---
_id: '36077'
author:
- first_name: Thomas
full_name: Hoppe, Thomas
id: '22671'
last_name: Hoppe
- first_name: Jens
full_name: Müller, Jens
id: '1245'
last_name: Müller
- first_name: Katharina
full_name: Wittek, Katharina
id: '69169'
last_name: Wittek
- first_name: Arndt
full_name: Weinrich, Arndt
id: '72091'
last_name: Weinrich
orcid: 0000-0002-3983-0269
citation:
ama: Hoppe T, Müller J, Wittek K, Weinrich A. Eine ökonomische Einordnung des öffentlichen
Country-by-Country Reporting in der EU. iStR. Published online 2021.
apa: Hoppe, T., Müller, J., Wittek, K., & Weinrich, A. (2021). Eine ökonomische
Einordnung des öffentlichen Country-by-Country Reporting in der EU. IStR.
bibtex: '@article{Hoppe_Müller_Wittek_Weinrich_2021, title={Eine ökonomische Einordnung
des öffentlichen Country-by-Country Reporting in der EU}, journal={iStR}, author={Hoppe,
Thomas and Müller, Jens and Wittek, Katharina and Weinrich, Arndt}, year={2021}
}'
chicago: Hoppe, Thomas, Jens Müller, Katharina Wittek, and Arndt Weinrich. “Eine
Ökonomische Einordnung Des Öffentlichen Country-by-Country Reporting in Der EU.”
IStR, 2021.
ieee: T. Hoppe, J. Müller, K. Wittek, and A. Weinrich, “Eine ökonomische Einordnung
des öffentlichen Country-by-Country Reporting in der EU,” iStR, 2021.
mla: Hoppe, Thomas, et al. “Eine Ökonomische Einordnung Des Öffentlichen Country-by-Country
Reporting in Der EU.” IStR, 2021.
short: T. Hoppe, J. Müller, K. Wittek, A. Weinrich, IStR (2021).
date_created: 2023-01-11T12:07:19Z
date_updated: 2026-02-04T07:12:03Z
department:
- _id: '635'
- _id: '189'
language:
- iso: eng
publication: iStR
status: public
title: Eine ökonomische Einordnung des öffentlichen Country-by-Country Reporting in
der EU
type: journal_article
user_id: '83776'
year: '2021'
...
---
_id: '37533'
author:
- first_name: Fredericke
full_name: Dopheide, Fredericke
last_name: Dopheide
- first_name: Christine
full_name: Freitag, Christine
id: '20560'
last_name: Freitag
- first_name: Lea
full_name: Koch, Lea
last_name: Koch
- first_name: Caroline
full_name: Struchholz, Caroline
last_name: Struchholz
citation:
ama: 'Dopheide F, Freitag C, Koch L, Struchholz C. Gesellschaftliche Wirkprozesse
des Civic Engagement qualitativ erforschen. In: Gerholz K-H, https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf,
eds. Impulse zu Methoden in der deutschsprachigen Civic Engagement-Forschung.
; 2021:15-32.'
apa: Dopheide, F., Freitag, C., Koch, L., & Struchholz, C. (2021). Gesellschaftliche
Wirkprozesse des Civic Engagement qualitativ erforschen. In K.-H. Gerholz &
https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf
(Eds.), Impulse zu Methoden in der deutschsprachigen Civic Engagement-Forschung
(pp. 15–32).
bibtex: '@inbook{Dopheide_Freitag_Koch_Struchholz_2021, title={Gesellschaftliche
Wirkprozesse des Civic Engagement qualitativ erforschen}, booktitle={Impulse zu
Methoden in der deutschsprachigen Civic Engagement-Forschung}, author={Dopheide,
Fredericke and Freitag, Christine and Koch, Lea and Struchholz, Caroline}, editor={Gerholz,
Karl-Heinz and https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf},
year={2021}, pages={15–32} }'
chicago: Dopheide, Fredericke, Christine Freitag, Lea Koch, and Caroline Struchholz.
“Gesellschaftliche Wirkprozesse des Civic Engagement qualitativ erforschen.” In
Impulse zu Methoden in der deutschsprachigen Civic Engagement-Forschung,
edited by Karl-Heinz Gerholz and https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf,
15–32, 2021.
ieee: F. Dopheide, C. Freitag, L. Koch, and C. Struchholz, “Gesellschaftliche Wirkprozesse
des Civic Engagement qualitativ erforschen,” in Impulse zu Methoden in der
deutschsprachigen Civic Engagement-Forschung, K.-H. Gerholz and https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf,
Eds. 2021, pp. 15–32.
mla: Dopheide, Fredericke, et al. “Gesellschaftliche Wirkprozesse des Civic Engagement
qualitativ erforschen.” Impulse zu Methoden in der deutschsprachigen Civic
Engagement-Forschung, edited by Karl-Heinz Gerholz and https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf,
2021, pp. 15–32.
short: 'F. Dopheide, C. Freitag, L. Koch, C. Struchholz, in: K.-H. Gerholz, https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf
(Eds.), Impulse zu Methoden in der deutschsprachigen Civic Engagement-Forschung,
2021, pp. 15–32.'
corporate_editor:
- https://www.bildung-durch-verantwortung.de/wp-content/uploads/2021/03/Proceedings_AGForschung_ImpulseMethoden.pdf
date_created: 2023-01-19T09:52:50Z
date_updated: 2026-02-06T10:08:25Z
department:
- _id: '453'
editor:
- first_name: Karl-Heinz
full_name: Gerholz, Karl-Heinz
last_name: Gerholz
language:
- iso: ger
page: 15-32
publication: Impulse zu Methoden in der deutschsprachigen Civic Engagement-Forschung
publication_status: published
status: public
title: Gesellschaftliche Wirkprozesse des Civic Engagement qualitativ erforschen
type: book_chapter
user_id: '10831'
year: '2021'
...
---
_id: '64052'
abstract:
- lang: eng
text: Abstract Estuaries are key ecosystems with unique biodiversity and are of
high economic importance. Along the estuaries, variations in environmental parameters,
such as salinity and light penetration, can modify the characteristics of dissolved
organic matter (DOM). Nevertheless, there is still limited information about the
atomic-level transformations of DOM in this ecosystem. Solid-state NMR spectroscopy
provides unique insights into the nature of functional groups in DOM. A major
limitation of this technique is its lack of sensivity, which results in experimental
time of tens of hours for the acquisition of 13C NMR spectra and generally precludes
the observation of 15N nuclei for DOM. We show here how the sensitivity of solid-state
NMR experiments on DOM of Seine estuary can be enhanced using dynamic nuclear
polarization (DNP) under magic-angle spinning. This technique allows the acquisition
of 13C NMR spectra of these samples in few minutes, instead of hours for conventional
solid-state NMR. Both conventional and DNP-enhanced 13C NMR spectra indicate that
the 13C local environments in DOM are not strongly modified along the Seine estuary.
Furthermore, the sensitivity gain provided by the DNP allows the detection of
15N NMR signal of DOM, in spite of the low nitrogen content. These spectra reveal
that the majority of nitrogen is in the amide form in these DOM samples and show
an increased disorder around these amide groups near the mouth of the Seine.
author:
- first_name: Florian
full_name: Venel, Florian
last_name: Venel
- first_name: Hiroki
full_name: Nagashima, Hiroki
last_name: Nagashima
- first_name: Andrew G. M.
full_name: Rankin, Andrew G. M.
last_name: Rankin
- first_name: Christelle
full_name: Anquetil, Christelle
last_name: Anquetil
- first_name: Vytautas
full_name: Klimavicius, Vytautas
last_name: Klimavicius
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Sylvie
full_name: Derenne, Sylvie
last_name: Derenne
- first_name: Olivier
full_name: Lafon, Olivier
last_name: Lafon
- first_name: Arnaud
full_name: Huguet, Arnaud
last_name: Huguet
- first_name: Frédérique
full_name: Pourpoint, Frédérique
last_name: Pourpoint
citation:
ama: Venel F, Nagashima H, Rankin AGM, et al. Characterization of Functional Groups
in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State
NMR. Chemphyschem. 2021;22(18):1907–1913. doi:10.1002/cphc.202100334
apa: Venel, F., Nagashima, H., Rankin, A. G. M., Anquetil, C., Klimavicius, V.,
Gutmann, T., Buntkowsky, G., Derenne, S., Lafon, O., Huguet, A., & Pourpoint,
F. (2021). Characterization of Functional Groups in Estuarine Dissolved Organic
Matter by DNP-enhanced 15N and 13C Solid-State NMR. Chemphyschem, 22(18),
1907–1913. https://doi.org/10.1002/cphc.202100334
bibtex: '@article{Venel_Nagashima_Rankin_Anquetil_Klimavicius_Gutmann_Buntkowsky_Derenne_Lafon_Huguet_et
al._2021, title={Characterization of Functional Groups in Estuarine Dissolved
Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR}, volume={22}, DOI={10.1002/cphc.202100334}, number={18},
journal={Chemphyschem}, publisher={John Wiley & Sons, Ltd}, author={Venel,
Florian and Nagashima, Hiroki and Rankin, Andrew G. M. and Anquetil, Christelle
and Klimavicius, Vytautas and Gutmann, Torsten and Buntkowsky, Gerd and Derenne,
Sylvie and Lafon, Olivier and Huguet, Arnaud and et al.}, year={2021}, pages={1907–1913}
}'
chicago: 'Venel, Florian, Hiroki Nagashima, Andrew G. M. Rankin, Christelle Anquetil,
Vytautas Klimavicius, Torsten Gutmann, Gerd Buntkowsky, et al. “Characterization
of Functional Groups in Estuarine Dissolved Organic Matter by DNP-Enhanced 15N
and 13C Solid-State NMR.” Chemphyschem 22, no. 18 (2021): 1907–1913. https://doi.org/10.1002/cphc.202100334.'
ieee: 'F. Venel et al., “Characterization of Functional Groups in Estuarine
Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR,” Chemphyschem,
vol. 22, no. 18, pp. 1907–1913, 2021, doi: 10.1002/cphc.202100334.'
mla: Venel, Florian, et al. “Characterization of Functional Groups in Estuarine
Dissolved Organic Matter by DNP-Enhanced 15N and 13C Solid-State NMR.” Chemphyschem,
vol. 22, no. 18, John Wiley & Sons, Ltd, 2021, pp. 1907–1913, doi:10.1002/cphc.202100334.
short: F. Venel, H. Nagashima, A.G.M. Rankin, C. Anquetil, V. Klimavicius, T. Gutmann,
G. Buntkowsky, S. Derenne, O. Lafon, A. Huguet, F. Pourpoint, Chemphyschem 22
(2021) 1907–1913.
date_created: 2026-02-07T16:14:11Z
date_updated: 2026-02-17T16:12:56Z
doi: 10.1002/cphc.202100334
extern: '1'
intvolume: ' 22'
issue: '18'
keyword:
- dynamic nuclear polarization
- 13C
- 15N
- dissolved organic matter
- Seine estuary
language:
- iso: eng
page: 1907–1913
publication: Chemphyschem
publication_identifier:
issn:
- 1439-4235; 1439-7641
publisher: John Wiley & Sons, Ltd
status: public
title: Characterization of Functional Groups in Estuarine Dissolved Organic Matter
by DNP-enhanced 15N and 13C Solid-State NMR
type: journal_article
user_id: '100715'
volume: 22
year: '2021'
...
---
_id: '64051'
abstract:
- lang: eng
text: The efficiency of dynamic nuclear polarization (DNP) enhanced 19F MAS NMR
spectroscopy without 19F-containing solvents and matrices, which transport polarization
via 19F–19F spin diffusion, is demonstrated. By preventing solvent and matrix
signals respectively masking the corresponding resonances, this enables the detection
of fluorinated target molecules in nanomolar amounts. As model compound, 1,3,5-tris(2-fluoro-2-methylpropionylamino)benzene
(F-BTA) is investigated in a frozen 1,1,2,2-tetrachloroethane (TCE) solution and
incorporated into a matrix of isotactic polypropylene (i-PP). While the polarizing
agent is homogeneously dissolved within the frozen solution, for the i-PP/F-BTA
blend, it is distributed via the incipient wetness impregnation (IWI) technique.
For the frozen solutions with an F-BTA concentration of 187.5 mM an εon/off of
260 was obtained. For F-BTA concentrations of 10 and 2.5 mM the sensitivity trend
suggests even higher DNP gains. The substantial enhancements could be achieved
by direct polarization transfer over distances up to at least 20 Å, derived from
a simple geometric model assuming a homogeneous solution, engaging a large part
of the sample volume. Cross-polarization (CP) to 13C nuclei allowed selection
of the NMR spectroscopic resonances of the minority species in the i-PP/F-BTA
blend suppressing the otherwise dominating resonances of the IWI solvent and the
polymer matrix. The possibility of exciting 19F via DNP directly and of transferring
the polarization to other heteronuclei within close proximity enables spatial
spectral editing to clear up spectra otherwise crowded by matrix and solvent signals.
We thus expect direct polarization transfer techniques for DNP enhanced NMR spectroscopy
to become more important in the future.
author:
- first_name: Kasper P.
full_name: van der Zwan, Kasper P.
last_name: van der Zwan
- first_name: Wiebke
full_name: Riedel, Wiebke
last_name: Riedel
- first_name: Fabien
full_name: Aussenac, Fabien
last_name: Aussenac
- first_name: Christian
full_name: Reiter, Christian
last_name: Reiter
- first_name: Klaus
full_name: Kreger, Klaus
last_name: Kreger
- first_name: Hans-Werner
full_name: Schmidt, Hans-Werner
last_name: Schmidt
- first_name: Thomas
full_name: Risse, Thomas
last_name: Risse
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Jürgen
full_name: Senker, Jürgen
last_name: Senker
citation:
ama: 'van der Zwan KP, Riedel W, Aussenac F, et al. 19F MAS DNP for Probing Molecules
in Nanomolar Concentrations: Direct Polarization as Key for Solid-State NMR Spectra
without Solvent and Matrix Signals. Journal of Physical Chemistry C. 2021;125(13):7287–7296.
doi:10.1021/acs.jpcc.1c01167'
apa: 'van der Zwan, K. P., Riedel, W., Aussenac, F., Reiter, C., Kreger, K., Schmidt,
H.-W., Risse, T., Gutmann, T., & Senker, J. (2021). 19F MAS DNP for Probing
Molecules in Nanomolar Concentrations: Direct Polarization as Key for Solid-State
NMR Spectra without Solvent and Matrix Signals. Journal of Physical Chemistry
C, 125(13), 7287–7296. https://doi.org/10.1021/acs.jpcc.1c01167'
bibtex: '@article{van der Zwan_Riedel_Aussenac_Reiter_Kreger_Schmidt_Risse_Gutmann_Senker_2021,
title={19F MAS DNP for Probing Molecules in Nanomolar Concentrations: Direct Polarization
as Key for Solid-State NMR Spectra without Solvent and Matrix Signals}, volume={125},
DOI={10.1021/acs.jpcc.1c01167},
number={13}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={van der Zwan, Kasper P. and Riedel, Wiebke and Aussenac, Fabien
and Reiter, Christian and Kreger, Klaus and Schmidt, Hans-Werner and Risse, Thomas
and Gutmann, Torsten and Senker, Jürgen}, year={2021}, pages={7287–7296} }'
chicago: 'Zwan, Kasper P. van der, Wiebke Riedel, Fabien Aussenac, Christian Reiter,
Klaus Kreger, Hans-Werner Schmidt, Thomas Risse, Torsten Gutmann, and Jürgen Senker.
“19F MAS DNP for Probing Molecules in Nanomolar Concentrations: Direct Polarization
as Key for Solid-State NMR Spectra without Solvent and Matrix Signals.” Journal
of Physical Chemistry C 125, no. 13 (2021): 7287–7296. https://doi.org/10.1021/acs.jpcc.1c01167.'
ieee: 'K. P. van der Zwan et al., “19F MAS DNP for Probing Molecules in Nanomolar
Concentrations: Direct Polarization as Key for Solid-State NMR Spectra without
Solvent and Matrix Signals,” Journal of Physical Chemistry C, vol. 125,
no. 13, pp. 7287–7296, 2021, doi: 10.1021/acs.jpcc.1c01167.'
mla: 'van der Zwan, Kasper P., et al. “19F MAS DNP for Probing Molecules in Nanomolar
Concentrations: Direct Polarization as Key for Solid-State NMR Spectra without
Solvent and Matrix Signals.” Journal of Physical Chemistry C, vol. 125,
no. 13, American Chemical Society, 2021, pp. 7287–7296, doi:10.1021/acs.jpcc.1c01167.'
short: K.P. van der Zwan, W. Riedel, F. Aussenac, C. Reiter, K. Kreger, H.-W. Schmidt,
T. Risse, T. Gutmann, J. Senker, Journal of Physical Chemistry C 125 (2021) 7287–7296.
date_created: 2026-02-07T16:13:55Z
date_updated: 2026-02-17T16:12:59Z
doi: 10.1021/acs.jpcc.1c01167
extern: '1'
intvolume: ' 125'
issue: '13'
language:
- iso: eng
page: 7287–7296
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: '19F MAS DNP for Probing Molecules in Nanomolar Concentrations: Direct Polarization
as Key for Solid-State NMR Spectra without Solvent and Matrix Signals'
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '64046'
abstract:
- lang: eng
text: The synthesis of a novel immobilized Wilkinson’s catalyst [SiO2∼PvPy-Wilk]
is presented. The support material of this catalyst consists of silica particles
that are modified with polymer brushes carrying pyridyl moieties that enable the
coordination of Wilkinson’s catalyst. The synthesis of this catalyst is monitored
by 1D and 2D multinuclear solid-state NMR techniques to confirm the success of
the immobilization. The [SiO2∼PvPy-Wilk] catalyst is then tested in the hydrogenation
of styrene, and its reusability is inspected showing that significant structural
changes after several reaction cycles yield an activation of the catalyst. Finally,
the catalyst is tested in PHIP experiments giving rise to about 200-fold enhancement
of the signals of the hydrogenation product ethylbenzene.
author:
- first_name: Mohamad
full_name: Srour, Mohamad
last_name: Srour
- first_name: Sara
full_name: Hadjiali, Sara
last_name: Hadjiali
- first_name: Kai
full_name: Brunnengräber, Kai
last_name: Brunnengräber
- first_name: Heiko
full_name: Weidler, Heiko
last_name: Weidler
- first_name: Yeping
full_name: Xu, Yeping
last_name: Xu
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: 'Srour M, Hadjiali S, Brunnengräber K, et al. A Novel Wilkinson’s Type Silica
Supported Polymer Catalyst: Insights from Solid-State NMR and Hyperpolarization
Techniques. Journal of Physical Chemistry C. 2021;125(13):7178–7187. doi:10.1021/acs.jpcc.1c00112'
apa: 'Srour, M., Hadjiali, S., Brunnengräber, K., Weidler, H., Xu, Y., Breitzke,
H., Gutmann, T., & Buntkowsky, G. (2021). A Novel Wilkinson’s Type Silica
Supported Polymer Catalyst: Insights from Solid-State NMR and Hyperpolarization
Techniques. Journal of Physical Chemistry C, 125(13), 7178–7187.
https://doi.org/10.1021/acs.jpcc.1c00112'
bibtex: '@article{Srour_Hadjiali_Brunnengräber_Weidler_Xu_Breitzke_Gutmann_Buntkowsky_2021,
title={A Novel Wilkinson’s Type Silica Supported Polymer Catalyst: Insights from
Solid-State NMR and Hyperpolarization Techniques}, volume={125}, DOI={10.1021/acs.jpcc.1c00112},
number={13}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Srour, Mohamad and Hadjiali, Sara and Brunnengräber, Kai and
Weidler, Heiko and Xu, Yeping and Breitzke, Hergen and Gutmann, Torsten and Buntkowsky,
Gerd}, year={2021}, pages={7178–7187} }'
chicago: 'Srour, Mohamad, Sara Hadjiali, Kai Brunnengräber, Heiko Weidler, Yeping
Xu, Hergen Breitzke, Torsten Gutmann, and Gerd Buntkowsky. “A Novel Wilkinson’s
Type Silica Supported Polymer Catalyst: Insights from Solid-State NMR and Hyperpolarization
Techniques.” Journal of Physical Chemistry C 125, no. 13 (2021): 7178–7187.
https://doi.org/10.1021/acs.jpcc.1c00112.'
ieee: 'M. Srour et al., “A Novel Wilkinson’s Type Silica Supported Polymer
Catalyst: Insights from Solid-State NMR and Hyperpolarization Techniques,” Journal
of Physical Chemistry C, vol. 125, no. 13, pp. 7178–7187, 2021, doi: 10.1021/acs.jpcc.1c00112.'
mla: 'Srour, Mohamad, et al. “A Novel Wilkinson’s Type Silica Supported Polymer
Catalyst: Insights from Solid-State NMR and Hyperpolarization Techniques.” Journal
of Physical Chemistry C, vol. 125, no. 13, American Chemical Society, 2021,
pp. 7178–7187, doi:10.1021/acs.jpcc.1c00112.'
short: M. Srour, S. Hadjiali, K. Brunnengräber, H. Weidler, Y. Xu, H. Breitzke,
T. Gutmann, G. Buntkowsky, Journal of Physical Chemistry C 125 (2021) 7178–7187.
date_created: 2026-02-07T16:12:28Z
date_updated: 2026-02-17T16:13:08Z
doi: 10.1021/acs.jpcc.1c00112
extern: '1'
intvolume: ' 125'
issue: '13'
language:
- iso: eng
page: 7178–7187
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: 'A Novel Wilkinson’s Type Silica Supported Polymer Catalyst: Insights from
Solid-State NMR and Hyperpolarization Techniques'
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '64032'
abstract:
- lang: eng
text: Ruthenium nanoparticles (Ru NPs) stabilized by bis-diphenylphosphinobutane
(dppb) and surface-saturated with hydrogen have been exposed to gaseous 15NH3
and studied using solid-state 15N CP MAS NMR. Three signals have been observed
at 24.5, −12 and −42 ppm (reference external liquid ammonia) which are assigned
to chemisorbed ammonia species RuNHx. Sample exposure to vacuum or aging leads
to conversion of the 24.5 ppm species into the other ones, a process which is
reversed by re-exposure to hydrogen gas. Exposure to a mixture of 15NH3 and 13CO
leads to the formation of surface bound urea as demonstrated by 15N and 13C CP
MAS NMR. To understand the surface reactions of ammonia and the 15N NMR results,
quantum chemical calculations of the structures, energies and 15N chemical shifts
of ammonia species on Ru6 and Ru55 model clusters have been performed. The calculations
indicate that under the experimental conditions applied, the fractions of RuNH3
and RuNH2 species are similar, independent of the H2 pressure. No RuN and RuNH
species are formed which are calculated to resonate at a lower field than the
signals observed experimentally. However, the 15N chemical shifts of RuNH2 depend
on the number of neighboring surface hydrogens and hence on the H2 pressure. Thus,
the signal at 24.5 ppm is assigned to RuNH2 in a neighborhood rich in surface
hydrogens. RuNH2 depleted in neighboring surface hydrogens and RuNH3 resonated
both in a similar chemical shift range to which the signals at −12 and −42 belong.
A change of the hydrogen pressure then leads to interconversion of hydrogen-rich
and hydrogen-poor neighborhoods of RuNH2 but does not alter the fractions of RuNH3
and RuNH2 according to the calculated stability diagram. Nevertheless, dissociation
of RuNH3 into RuNH2 and surface hydrogen is expected to take place during the
initial ammonia adsorption process and at low H2 pressures and high temperatures.
Finally, some preliminary quantum chemical calculations suggest stepwise binding
of two NH2 groups to adsorbed CO leading to surface bound urea where the oxygen
is coordinated to Ru.
author:
- first_name: Niels
full_name: Rothermel, Niels
last_name: Rothermel
- first_name: Hans-Heinrich
full_name: Limbach, Hans-Heinrich
last_name: Limbach
- first_name: Iker
full_name: Del Rosal, Iker
last_name: Del Rosal
- first_name: Romuald
full_name: Poteau, Romuald
last_name: Poteau
- first_name: Gabriel
full_name: Mencia, Gabriel
last_name: Mencia
- first_name: Bruno
full_name: Chaudret, Bruno
last_name: Chaudret
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
citation:
ama: Rothermel N, Limbach H-H, Del Rosal I, et al. Surface reactions of ammonia
on ruthenium nanoparticles revealed by 15N and 13C solid-state NMR. Catalysis
Science & Technology. 2021;11(13):4509–4520. doi:10.1039/D0CY02476G
apa: Rothermel, N., Limbach, H.-H., Del Rosal, I., Poteau, R., Mencia, G., Chaudret,
B., Buntkowsky, G., & Gutmann, T. (2021). Surface reactions of ammonia on
ruthenium nanoparticles revealed by 15N and 13C solid-state NMR. Catalysis
Science & Technology, 11(13), 4509–4520. https://doi.org/10.1039/D0CY02476G
bibtex: '@article{Rothermel_Limbach_Del Rosal_Poteau_Mencia_Chaudret_Buntkowsky_Gutmann_2021,
title={Surface reactions of ammonia on ruthenium nanoparticles revealed by 15N
and 13C solid-state NMR}, volume={11}, DOI={10.1039/D0CY02476G},
number={13}, journal={Catalysis Science & Technology}, publisher={The Royal
Society of Chemistry}, author={Rothermel, Niels and Limbach, Hans-Heinrich and
Del Rosal, Iker and Poteau, Romuald and Mencia, Gabriel and Chaudret, Bruno and
Buntkowsky, Gerd and Gutmann, Torsten}, year={2021}, pages={4509–4520} }'
chicago: 'Rothermel, Niels, Hans-Heinrich Limbach, Iker Del Rosal, Romuald Poteau,
Gabriel Mencia, Bruno Chaudret, Gerd Buntkowsky, and Torsten Gutmann. “Surface
Reactions of Ammonia on Ruthenium Nanoparticles Revealed by 15N and 13C Solid-State
NMR.” Catalysis Science & Technology 11, no. 13 (2021): 4509–4520.
https://doi.org/10.1039/D0CY02476G.'
ieee: 'N. Rothermel et al., “Surface reactions of ammonia on ruthenium nanoparticles
revealed by 15N and 13C solid-state NMR,” Catalysis Science & Technology,
vol. 11, no. 13, pp. 4509–4520, 2021, doi: 10.1039/D0CY02476G.'
mla: Rothermel, Niels, et al. “Surface Reactions of Ammonia on Ruthenium Nanoparticles
Revealed by 15N and 13C Solid-State NMR.” Catalysis Science & Technology,
vol. 11, no. 13, The Royal Society of Chemistry, 2021, pp. 4509–4520, doi:10.1039/D0CY02476G.
short: N. Rothermel, H.-H. Limbach, I. Del Rosal, R. Poteau, G. Mencia, B. Chaudret,
G. Buntkowsky, T. Gutmann, Catalysis Science & Technology 11 (2021) 4509–4520.
date_created: 2026-02-07T16:06:48Z
date_updated: 2026-02-17T16:13:50Z
doi: 10.1039/D0CY02476G
extern: '1'
intvolume: ' 11'
issue: '13'
language:
- iso: eng
page: 4509–4520
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
publisher: The Royal Society of Chemistry
status: public
title: Surface reactions of ammonia on ruthenium nanoparticles revealed by 15N and
13C solid-state NMR
type: journal_article
user_id: '100715'
volume: 11
year: '2021'
...
---
_id: '64025'
abstract:
- lang: eng
text: Dirhodium(II) complexes such as [Rh2(TFA)4] bound to a functionalized mesoporous
SBA-15 carrier material have proven to be valuable candidates for heterogeneous
catalysis in the field of pharmaceutical synthesis. However, the mechanistic steps
of immobilization by linker molecules containing carboxyl or amine functionalities
remain the subject of discussion. Here we present a theoretical study of possible
mechanistic binding pathways for the [Rh2(TFA)4] complex through model representations
of synthetically investigated linkers, namely n-butylamine and n-butyric acid.
Experimentally proposed intermediates of the immobilization process are investigated
and analyzed by density functional theory calculations to gain insights into structural
properties and the influence of solvation. An evaluation of the thermodynamic
data for all identified intermediates allowed distinguishing between two possible
reaction pathways that are characterized by a first axial complexation of either
n-butyric acid or n-butylamine. In agreement with results from NMR spectroscopy,
singly or doubly n-butylamine-fixated complexes were found to present possible
immobilization products. Initial binding through a carboxy-functionalized linker
is proposed as the most favorable reaction pathway for the formation of the mixed
linker pattern [Rh2(TFA)3]·(n-butylamine)·(n-butyrate). The linkers n-butyric
acid and n-butyrate, respectively, are found to exhibit an unaltered binding affinity
to the dirhodium complex despite their protonation states, indicating invariance
to the acidic environment unlike an immobilization by n-butylamine. These results
present a theoretical framework for the rationalization of observed product distributions
while also providing inspiration and guidance for the preparation of functionalized
heterogeneous SBA-15/dirhodium catalyst systems.
author:
- first_name: Dennis S.
full_name: Pietruschka, Dennis S.
last_name: Pietruschka
- first_name: Bharti
full_name: Kumari, Bharti
last_name: Kumari
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Doreen
full_name: Mollenhauer, Doreen
last_name: Mollenhauer
citation:
ama: 'Pietruschka DS, Kumari B, Buntkowsky G, Gutmann T, Mollenhauer D. Mechanism
of Heterogenization of Dirhodium Catalysts: Insights from DFT Calculations. Inorganic
Chemistry. 2021;60(9):6239–6248. doi:10.1021/acs.inorgchem.0c03712'
apa: 'Pietruschka, D. S., Kumari, B., Buntkowsky, G., Gutmann, T., & Mollenhauer,
D. (2021). Mechanism of Heterogenization of Dirhodium Catalysts: Insights from
DFT Calculations. Inorganic Chemistry, 60(9), 6239–6248. https://doi.org/10.1021/acs.inorgchem.0c03712'
bibtex: '@article{Pietruschka_Kumari_Buntkowsky_Gutmann_Mollenhauer_2021, title={Mechanism
of Heterogenization of Dirhodium Catalysts: Insights from DFT Calculations}, volume={60},
DOI={10.1021/acs.inorgchem.0c03712},
number={9}, journal={Inorganic Chemistry}, publisher={American Chemical Society},
author={Pietruschka, Dennis S. and Kumari, Bharti and Buntkowsky, Gerd and Gutmann,
Torsten and Mollenhauer, Doreen}, year={2021}, pages={6239–6248} }'
chicago: 'Pietruschka, Dennis S., Bharti Kumari, Gerd Buntkowsky, Torsten Gutmann,
and Doreen Mollenhauer. “Mechanism of Heterogenization of Dirhodium Catalysts:
Insights from DFT Calculations.” Inorganic Chemistry 60, no. 9 (2021):
6239–6248. https://doi.org/10.1021/acs.inorgchem.0c03712.'
ieee: 'D. S. Pietruschka, B. Kumari, G. Buntkowsky, T. Gutmann, and D. Mollenhauer,
“Mechanism of Heterogenization of Dirhodium Catalysts: Insights from DFT Calculations,”
Inorganic Chemistry, vol. 60, no. 9, pp. 6239–6248, 2021, doi: 10.1021/acs.inorgchem.0c03712.'
mla: 'Pietruschka, Dennis S., et al. “Mechanism of Heterogenization of Dirhodium
Catalysts: Insights from DFT Calculations.” Inorganic Chemistry, vol. 60,
no. 9, American Chemical Society, 2021, pp. 6239–6248, doi:10.1021/acs.inorgchem.0c03712.'
short: D.S. Pietruschka, B. Kumari, G. Buntkowsky, T. Gutmann, D. Mollenhauer, Inorganic
Chemistry 60 (2021) 6239–6248.
date_created: 2026-02-07T16:04:53Z
date_updated: 2026-02-17T16:14:13Z
doi: 10.1021/acs.inorgchem.0c03712
extern: '1'
intvolume: ' 60'
issue: '9'
language:
- iso: eng
page: 6239–6248
publication: Inorganic Chemistry
publisher: American Chemical Society
status: public
title: 'Mechanism of Heterogenization of Dirhodium Catalysts: Insights from DFT Calculations'
type: journal_article
user_id: '100715'
volume: 60
year: '2021'
...
---
_id: '64027'
abstract:
- lang: eng
text: The biorelevant PyFALGEA oligopeptide ligand, which is selective towards the
epidermal growth factor receptor (EGFR), has been successfully employed as a substrate
in magnetic resonance signal amplification by reversible exchange (SABRE) experiments.
It is demonstrated that PyFALGEA and the iridium catalyst IMes form a PyFALGEA:IMes
molecular complex. The interaction between PyFALGEA:IMes and H-2 results in a
ternary SABRE complex. Selective 1D EXSY experiments reveal that this complex
is labile, which is an essential condition for successful hyperpolarization by
SABRE. Polarization transfer from parahydrogen to PyFALGEA is observed leading
to significant enhancement of the H-1 NMR signals of PyFALGEA. Different iridium
catalysts and peptides are inspected to discuss the influence of their molecular
structures on the efficiency of hyperpolarization. It is observed that PyFALGEA
oligopeptide hyperpolarization is more efficient when an iridium catalyst with
a sterically less demanding NHC ligand system such as IMesBn is employed. Experiments
with shorter analogues of PyFALGEA, that is, PyLGEA and PyEA, show that the bulky
phenylalanine from the PyFALGEA oligopeptide causes steric hindrance in the SABRE
complex, which hampers hyperpolarization with IMes. Finally, a single-scan H-1
NMR SABRE experiment of PyFALGEA with IMesBn revealed a unique pattern of NMR
lines in the hydride region, which can be treated as a fingerprint of this important
oligopeptide.
author:
- first_name: T.
full_name: Ratajczyk, T.
last_name: Ratajczyk
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: B.
full_name: Fedorczyk, B.
last_name: Fedorczyk
- first_name: A.
full_name: Mames, A.
last_name: Mames
- first_name: M.
full_name: Pietrzak, M.
last_name: Pietrzak
- first_name: Z.
full_name: Puzio, Z.
last_name: Puzio
- first_name: P. G.
full_name: Szkudlarek, P. G.
last_name: Szkudlarek
citation:
ama: Ratajczyk T, Buntkowsky G, Gutmann T, et al. Magnetic Resonance Signal Amplification
by Reversible Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal
Growth Factor Receptors. ChemBioChem. 2021;22(5):855–860. doi:10.1002/cbic.202000711
apa: Ratajczyk, T., Buntkowsky, G., Gutmann, T., Fedorczyk, B., Mames, A., Pietrzak,
M., Puzio, Z., & Szkudlarek, P. G. (2021). Magnetic Resonance Signal Amplification
by Reversible Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal
Growth Factor Receptors. ChemBioChem, 22(5), 855–860. https://doi.org/10.1002/cbic.202000711
bibtex: '@article{Ratajczyk_Buntkowsky_Gutmann_Fedorczyk_Mames_Pietrzak_Puzio_Szkudlarek_2021,
title={Magnetic Resonance Signal Amplification by Reversible Exchange of Selective
PyFALGEA Oligopeptide Ligands Towards Epidermal Growth Factor Receptors}, volume={22},
DOI={10.1002/cbic.202000711},
number={5}, journal={ChemBioChem}, author={Ratajczyk, T. and Buntkowsky, G. and
Gutmann, Torsten and Fedorczyk, B. and Mames, A. and Pietrzak, M. and Puzio, Z.
and Szkudlarek, P. G.}, year={2021}, pages={855–860} }'
chicago: 'Ratajczyk, T., G. Buntkowsky, Torsten Gutmann, B. Fedorczyk, A. Mames,
M. Pietrzak, Z. Puzio, and P. G. Szkudlarek. “Magnetic Resonance Signal Amplification
by Reversible Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal
Growth Factor Receptors.” ChemBioChem 22, no. 5 (2021): 855–860. https://doi.org/10.1002/cbic.202000711.'
ieee: 'T. Ratajczyk et al., “Magnetic Resonance Signal Amplification by Reversible
Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal Growth Factor
Receptors,” ChemBioChem, vol. 22, no. 5, pp. 855–860, 2021, doi: 10.1002/cbic.202000711.'
mla: Ratajczyk, T., et al. “Magnetic Resonance Signal Amplification by Reversible
Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal Growth Factor
Receptors.” ChemBioChem, vol. 22, no. 5, 2021, pp. 855–860, doi:10.1002/cbic.202000711.
short: T. Ratajczyk, G. Buntkowsky, T. Gutmann, B. Fedorczyk, A. Mames, M. Pietrzak,
Z. Puzio, P.G. Szkudlarek, ChemBioChem 22 (2021) 855–860.
date_created: 2026-02-07T16:05:21Z
date_updated: 2026-02-17T16:14:09Z
doi: 10.1002/cbic.202000711
extern: '1'
intvolume: ' 22'
issue: '5'
language:
- iso: eng
page: 855–860
publication: ChemBioChem
status: public
title: Magnetic Resonance Signal Amplification by Reversible Exchange of Selective
PyFALGEA Oligopeptide Ligands Towards Epidermal Growth Factor Receptors
type: journal_article
user_id: '100715'
volume: 22
year: '2021'
...
---
_id: '64022'
abstract:
- lang: eng
text: High-field dynamic nuclear polarization is a powerful tool for the structural
characterization of species on the surface of porous materials or nanoparticles.
For these studies the main source of polarization are radical-containing solutions
which are added by post-synthesis impregnation of the sample. Although this strategy
is very efficient for a wide variety of materials, the presence of the solvent
may influence the chemistry of functional species of interest. Here we address
the development of a comprehensive strategy for solvent-free DNP enhanced NMR
characterization of functional (target) species on the surface of mesoporous silica
(SBA-15). The strategy includes the partial functionalization of the silica surface
with Carboxy-Proxyl nitroxide radicals and target Fmoc-Glycine functional groups.
As a proof of principle, we have observed for the first time DNP signal enhancements,
using the solvent-free approach, for 13C1H CPMAS signals corresponding to organic
functionalities on the silica surface. DNP enhancements of up to 3.4 were observed
for 13C1H CPMAS, corresponding to an experimental time save of about 12 times.
This observation opens the possibility for the DNP-NMR study of surface functional
groups without the need of a solvent, allowing, for example, the characterization
of catalytic reactions occurring on the surface of mesoporous systems of interest.
For 29Si with direct polarization NMR, up to 8-fold DNP enhancements were obtained.
This 29Si signal enhancement is considerably higher than the obtained with similar
approaches reported in literature. Finally, from DNP enhancement profiles we conclude
that cross-effect is probably the dominant polarization transfer mechanism.
author:
- first_name: Marcos
full_name: Oliveira, Marcos
last_name: Oliveira
- first_name: Kevin
full_name: Herr, Kevin
last_name: Herr
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- first_name: Nadia B.
full_name: Haro-Mares, Nadia B.
last_name: Haro-Mares
- first_name: Till
full_name: Wissel, Till
last_name: Wissel
- first_name: Vytautas
full_name: Klimavicius, Vytautas
last_name: Klimavicius
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Oliveira M, Herr K, Brodrecht M, et al. Solvent-free dynamic nuclear polarization
enhancements in organically modified mesoporous silica. Physical Chemistry
Chemical Physics. 2021;23(22):12559–12568. doi:10.1039/D1CP00985K
apa: Oliveira, M., Herr, K., Brodrecht, M., Haro-Mares, N. B., Wissel, T., Klimavicius,
V., Breitzke, H., Gutmann, T., & Buntkowsky, G. (2021). Solvent-free dynamic
nuclear polarization enhancements in organically modified mesoporous silica. Physical
Chemistry Chemical Physics, 23(22), 12559–12568. https://doi.org/10.1039/D1CP00985K
bibtex: '@article{Oliveira_Herr_Brodrecht_Haro-Mares_Wissel_Klimavicius_Breitzke_Gutmann_Buntkowsky_2021,
title={Solvent-free dynamic nuclear polarization enhancements in organically modified
mesoporous silica}, volume={23}, DOI={10.1039/D1CP00985K},
number={22}, journal={Physical Chemistry Chemical Physics}, publisher={The Royal
Society of Chemistry}, author={Oliveira, Marcos and Herr, Kevin and Brodrecht,
Martin and Haro-Mares, Nadia B. and Wissel, Till and Klimavicius, Vytautas and
Breitzke, Hergen and Gutmann, Torsten and Buntkowsky, Gerd}, year={2021}, pages={12559–12568}
}'
chicago: 'Oliveira, Marcos, Kevin Herr, Martin Brodrecht, Nadia B. Haro-Mares, Till
Wissel, Vytautas Klimavicius, Hergen Breitzke, Torsten Gutmann, and Gerd Buntkowsky.
“Solvent-Free Dynamic Nuclear Polarization Enhancements in Organically Modified
Mesoporous Silica.” Physical Chemistry Chemical Physics 23, no. 22 (2021):
12559–12568. https://doi.org/10.1039/D1CP00985K.'
ieee: 'M. Oliveira et al., “Solvent-free dynamic nuclear polarization enhancements
in organically modified mesoporous silica,” Physical Chemistry Chemical Physics,
vol. 23, no. 22, pp. 12559–12568, 2021, doi: 10.1039/D1CP00985K.'
mla: Oliveira, Marcos, et al. “Solvent-Free Dynamic Nuclear Polarization Enhancements
in Organically Modified Mesoporous Silica.” Physical Chemistry Chemical Physics,
vol. 23, no. 22, The Royal Society of Chemistry, 2021, pp. 12559–12568, doi:10.1039/D1CP00985K.
short: M. Oliveira, K. Herr, M. Brodrecht, N.B. Haro-Mares, T. Wissel, V. Klimavicius,
H. Breitzke, T. Gutmann, G. Buntkowsky, Physical Chemistry Chemical Physics 23
(2021) 12559–12568.
date_created: 2026-02-07T16:03:58Z
date_updated: 2026-02-17T16:14:21Z
doi: 10.1039/D1CP00985K
extern: '1'
intvolume: ' 23'
issue: '22'
language:
- iso: eng
page: 12559–12568
publication: Physical Chemistry Chemical Physics
publisher: The Royal Society of Chemistry
status: public
title: Solvent-free dynamic nuclear polarization enhancements in organically modified
mesoporous silica
type: journal_article
user_id: '100715'
volume: 23
year: '2021'
...
---
_id: '64016'
abstract:
- lang: eng
text: Bacterial cellulose (BC) combined with organo-bridged porous silica nanoparticles
offers potential opportunities to develop smart hybrid materials such as advanced
drug delivery nanosystems. This work reports the preparation of bacterial cellulose
membrane (BCM) and their modification by in situ methodology with the organo-bridged
precursor 1,4-bis(triethoxysilyl)benzene (BTEB). BTEB was successfully incorporated
into the BCM, and spherical hybrid silica nanoparticles with heterogeneous particle
size (30–100 nm) and probably porous structure were formed and characterized by
scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier
transform infrared–attenuated total reflectance (FTIR-ATR), thermogravimetric
analysis (TGA), and solid state nuclear magnetic resonance (NMR). We further combined
solid-state NMR with dynamic nuclear polarization (DNP) to achieve sensitivity
enhancement and to selectively enhance the NMR signal of the hydrophobic BTEB
moieties on the BCM surface. This allowed us to get more detailed structural information
about the BTEB–BCM multicomponent material.
author:
- first_name: Andreia S.
full_name: Monteiro, Andreia S.
last_name: Monteiro
- first_name: Marcos
full_name: Oliveira, Marcos
last_name: Oliveira
- first_name: Silvia
full_name: Santagneli, Silvia
last_name: Santagneli
- first_name: Carole
full_name: Carcel, Carole
last_name: Carcel
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Michel Wong Chi
full_name: Man, Michel Wong Chi
last_name: Man
- first_name: Hernane S.
full_name: Barud, Hernane S.
last_name: Barud
- first_name: Sidney J. L.
full_name: Ribeiro, Sidney J. L.
last_name: Ribeiro
citation:
ama: 'Monteiro AS, Oliveira M, Santagneli S, et al. Modification of Bacterial Cellulose
Membrane with 1,4-Bis(triethoxysilyl)benzene: A Thorough Physical–Chemical Characterization
Study. Journal of Physical Chemistry C. 2021;125(8):4498–4508. doi:10.1021/acs.jpcc.0c09837'
apa: 'Monteiro, A. S., Oliveira, M., Santagneli, S., Carcel, C., Gutmann, T., Buntkowsky,
G., Man, M. W. C., Barud, H. S., & Ribeiro, S. J. L. (2021). Modification
of Bacterial Cellulose Membrane with 1,4-Bis(triethoxysilyl)benzene: A Thorough
Physical–Chemical Characterization Study. Journal of Physical Chemistry C,
125(8), 4498–4508. https://doi.org/10.1021/acs.jpcc.0c09837'
bibtex: '@article{Monteiro_Oliveira_Santagneli_Carcel_Gutmann_Buntkowsky_Man_Barud_Ribeiro_2021,
title={Modification of Bacterial Cellulose Membrane with 1,4-Bis(triethoxysilyl)benzene:
A Thorough Physical–Chemical Characterization Study}, volume={125}, DOI={10.1021/acs.jpcc.0c09837},
number={8}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Monteiro, Andreia S. and Oliveira, Marcos and Santagneli, Silvia
and Carcel, Carole and Gutmann, Torsten and Buntkowsky, Gerd and Man, Michel Wong
Chi and Barud, Hernane S. and Ribeiro, Sidney J. L.}, year={2021}, pages={4498–4508}
}'
chicago: 'Monteiro, Andreia S., Marcos Oliveira, Silvia Santagneli, Carole Carcel,
Torsten Gutmann, Gerd Buntkowsky, Michel Wong Chi Man, Hernane S. Barud, and Sidney
J. L. Ribeiro. “Modification of Bacterial Cellulose Membrane with 1,4-Bis(Triethoxysilyl)Benzene:
A Thorough Physical–Chemical Characterization Study.” Journal of Physical Chemistry
C 125, no. 8 (2021): 4498–4508. https://doi.org/10.1021/acs.jpcc.0c09837.'
ieee: 'A. S. Monteiro et al., “Modification of Bacterial Cellulose Membrane
with 1,4-Bis(triethoxysilyl)benzene: A Thorough Physical–Chemical Characterization
Study,” Journal of Physical Chemistry C, vol. 125, no. 8, pp. 4498–4508,
2021, doi: 10.1021/acs.jpcc.0c09837.'
mla: 'Monteiro, Andreia S., et al. “Modification of Bacterial Cellulose Membrane
with 1,4-Bis(Triethoxysilyl)Benzene: A Thorough Physical–Chemical Characterization
Study.” Journal of Physical Chemistry C, vol. 125, no. 8, American Chemical
Society, 2021, pp. 4498–4508, doi:10.1021/acs.jpcc.0c09837.'
short: A.S. Monteiro, M. Oliveira, S. Santagneli, C. Carcel, T. Gutmann, G. Buntkowsky,
M.W.C. Man, H.S. Barud, S.J.L. Ribeiro, Journal of Physical Chemistry C 125 (2021)
4498–4508.
date_created: 2026-02-07T16:01:29Z
date_updated: 2026-02-17T16:15:10Z
doi: 10.1021/acs.jpcc.0c09837
extern: '1'
intvolume: ' 125'
issue: '8'
language:
- iso: eng
page: 4498–4508
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: 'Modification of Bacterial Cellulose Membrane with 1,4-Bis(triethoxysilyl)benzene:
A Thorough Physical–Chemical Characterization Study'
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '64015'
abstract:
- lang: eng
text: Periodate oxidation reaction occurring directly on chitin has been neglected
in polysaccharide chemistry so far. Herein, we present the first direct alkaline
periodate oxidation of chitin, which demonstrates at the same time a novel approach
for the preparation of chitin nanocrystals (ChNCs). This oxidation is based on
an unprecedented selective reaction of non-ordered domains of chitin by the dimeric
orthoperiodate ions (H2I2O104−) as the major species in alkaline surroundings.
Nearly 50 wt% of non-ordered regions are dissolved after sequential accelerated
partial deacetylation, periodate oxidation and β-alkoxy fragmentation, which allows
the isolation of up to 50 wt% of uniform anisotropic zwitterionic ChNCs.
author:
- first_name: Peiwen
full_name: Liu, Peiwen
last_name: Liu
- first_name: Huan
full_name: Liu, Huan
last_name: Liu
- first_name: Timmy
full_name: Schäfer, Timmy
last_name: Schäfer
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Holger
full_name: Gibhardt, Holger
last_name: Gibhardt
- first_name: Houjuan
full_name: Qi, Houjuan
last_name: Qi
- first_name: Lin
full_name: Tian, Lin
last_name: Tian
- first_name: Xizhou Cecily
full_name: Zhang, Xizhou Cecily
last_name: Zhang
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Kai
full_name: Zhang, Kai
last_name: Zhang
citation:
ama: Liu P, Liu H, Schäfer T, et al. Unexpected selective alkaline periodate oxidation
of chitin for the isolation of chitin nanocrystals. Green Chemistry. 2021;23(2):745–751.
doi:10.1039/D0GC04054A
apa: Liu, P., Liu, H., Schäfer, T., Gutmann, T., Gibhardt, H., Qi, H., Tian, L.,
Zhang, X. C., Buntkowsky, G., & Zhang, K. (2021). Unexpected selective alkaline
periodate oxidation of chitin for the isolation of chitin nanocrystals. Green
Chemistry, 23(2), 745–751. https://doi.org/10.1039/D0GC04054A
bibtex: '@article{Liu_Liu_Schäfer_Gutmann_Gibhardt_Qi_Tian_Zhang_Buntkowsky_Zhang_2021,
title={Unexpected selective alkaline periodate oxidation of chitin for the isolation
of chitin nanocrystals}, volume={23}, DOI={10.1039/D0GC04054A},
number={2}, journal={Green Chemistry}, publisher={The Royal Society of Chemistry},
author={Liu, Peiwen and Liu, Huan and Schäfer, Timmy and Gutmann, Torsten and
Gibhardt, Holger and Qi, Houjuan and Tian, Lin and Zhang, Xizhou Cecily and Buntkowsky,
Gerd and Zhang, Kai}, year={2021}, pages={745–751} }'
chicago: 'Liu, Peiwen, Huan Liu, Timmy Schäfer, Torsten Gutmann, Holger Gibhardt,
Houjuan Qi, Lin Tian, Xizhou Cecily Zhang, Gerd Buntkowsky, and Kai Zhang. “Unexpected
Selective Alkaline Periodate Oxidation of Chitin for the Isolation of Chitin Nanocrystals.”
Green Chemistry 23, no. 2 (2021): 745–751. https://doi.org/10.1039/D0GC04054A.'
ieee: 'P. Liu et al., “Unexpected selective alkaline periodate oxidation
of chitin for the isolation of chitin nanocrystals,” Green Chemistry, vol.
23, no. 2, pp. 745–751, 2021, doi: 10.1039/D0GC04054A.'
mla: Liu, Peiwen, et al. “Unexpected Selective Alkaline Periodate Oxidation of Chitin
for the Isolation of Chitin Nanocrystals.” Green Chemistry, vol. 23, no.
2, The Royal Society of Chemistry, 2021, pp. 745–751, doi:10.1039/D0GC04054A.
short: P. Liu, H. Liu, T. Schäfer, T. Gutmann, H. Gibhardt, H. Qi, L. Tian, X.C.
Zhang, G. Buntkowsky, K. Zhang, Green Chemistry 23 (2021) 745–751.
date_created: 2026-02-07T16:01:08Z
date_updated: 2026-02-17T16:15:12Z
doi: 10.1039/D0GC04054A
extern: '1'
intvolume: ' 23'
issue: '2'
language:
- iso: eng
page: 745–751
publication: Green Chemistry
publisher: The Royal Society of Chemistry
status: public
title: Unexpected selective alkaline periodate oxidation of chitin for the isolation
of chitin nanocrystals
type: journal_article
user_id: '100715'
volume: 23
year: '2021'
...
---
_id: '64006'
abstract:
- lang: eng
text: Three chiral dirhodium coordination polymers Rh2–Ln (n = 1–3) have been synthesized
via ligand exchange between dirhodium trifluoroacetate Rh2(TFA)4 and differently
sized chiral dicarboxylic acids derived from l-tert-leucine. SEM images indicate
that the Rh2–Ln (n = 1–3) polymers have a lamellar structure. XPS data demonstrate
that the oxidation state of rhodium in the dirhodium nodes is maintained during
the synthesis of the polymers. The coordination polymers have been further characterized
by FTIR, 1H → 13C CP MAS NMR and 19F MAS NMR spectroscopy to prove the formation
of polymers via ligand exchange. Although the quantitative 19F MAS NMR spectra
reveal incomplete ligand substitution in the coordination polymers, these catalysts
show excellent activity and selectivity in the asymmetric cyclopropanation reaction
between styrene and diazooxindole. In particular, the enantioselectivity has been
significantly improved compared with previously designed dirhodium coordination
polymers, which were synthesized from aromatic dicarboxylic acids derived from
l-phenylalanine. Meanwhile, the dirhodium polymers can be easily recycled five
times without significant reduction in their catalytic efficiency.
author:
- first_name: Zhenzhong
full_name: Li, Zhenzhong
last_name: Li
- first_name: Lorenz
full_name: Rösler, Lorenz
last_name: Rösler
- first_name: Till
full_name: Wissel, Till
last_name: Wissel
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Kathrin
full_name: Hofmann, Kathrin
last_name: Hofmann
- first_name: Hans-Heinrich
full_name: Limbach, Hans-Heinrich
last_name: Limbach
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Li Z, Rösler L, Wissel T, et al. Design and characterization of novel dirhodium
coordination polymers – the impact of ligand size on selectivity in asymmetric
cyclopropanation. Catalysis Science & Technology. 2021;11(10):3481–3492.
doi:10.1039/D1CY00109D
apa: Li, Z., Rösler, L., Wissel, T., Breitzke, H., Hofmann, K., Limbach, H.-H.,
Gutmann, T., & Buntkowsky, G. (2021). Design and characterization of novel
dirhodium coordination polymers – the impact of ligand size on selectivity in
asymmetric cyclopropanation. Catalysis Science & Technology, 11(10),
3481–3492. https://doi.org/10.1039/D1CY00109D
bibtex: '@article{Li_Rösler_Wissel_Breitzke_Hofmann_Limbach_Gutmann_Buntkowsky_2021,
title={Design and characterization of novel dirhodium coordination polymers –
the impact of ligand size on selectivity in asymmetric cyclopropanation}, volume={11},
DOI={10.1039/D1CY00109D}, number={10},
journal={Catalysis Science & Technology}, publisher={The Royal Society of
Chemistry}, author={Li, Zhenzhong and Rösler, Lorenz and Wissel, Till and Breitzke,
Hergen and Hofmann, Kathrin and Limbach, Hans-Heinrich and Gutmann, Torsten and
Buntkowsky, Gerd}, year={2021}, pages={3481–3492} }'
chicago: 'Li, Zhenzhong, Lorenz Rösler, Till Wissel, Hergen Breitzke, Kathrin Hofmann,
Hans-Heinrich Limbach, Torsten Gutmann, and Gerd Buntkowsky. “Design and Characterization
of Novel Dirhodium Coordination Polymers – the Impact of Ligand Size on Selectivity
in Asymmetric Cyclopropanation.” Catalysis Science & Technology 11,
no. 10 (2021): 3481–3492. https://doi.org/10.1039/D1CY00109D.'
ieee: 'Z. Li et al., “Design and characterization of novel dirhodium coordination
polymers – the impact of ligand size on selectivity in asymmetric cyclopropanation,”
Catalysis Science & Technology, vol. 11, no. 10, pp. 3481–3492, 2021,
doi: 10.1039/D1CY00109D.'
mla: Li, Zhenzhong, et al. “Design and Characterization of Novel Dirhodium Coordination
Polymers – the Impact of Ligand Size on Selectivity in Asymmetric Cyclopropanation.”
Catalysis Science & Technology, vol. 11, no. 10, The Royal Society
of Chemistry, 2021, pp. 3481–3492, doi:10.1039/D1CY00109D.
short: Z. Li, L. Rösler, T. Wissel, H. Breitzke, K. Hofmann, H.-H. Limbach, T. Gutmann,
G. Buntkowsky, Catalysis Science & Technology 11 (2021) 3481–3492.
date_created: 2026-02-07T15:55:39Z
date_updated: 2026-02-17T16:15:33Z
doi: 10.1039/D1CY00109D
extern: '1'
intvolume: ' 11'
issue: '10'
language:
- iso: eng
page: 3481–3492
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
publisher: The Royal Society of Chemistry
status: public
title: Design and characterization of novel dirhodium coordination polymers – the
impact of ligand size on selectivity in asymmetric cyclopropanation
type: journal_article
user_id: '100715'
volume: 11
year: '2021'
...
---
_id: '64005'
abstract:
- lang: eng
text: A novel immobilized chiral dirhodium catalyst, Rh2(S-PTTL)3(S-PTTL-linker)∼SBA-15
(8), has been prepared via click reaction of azide-groups on functionalized SBA-15
with the dirhodium complex Rh2(S-PTTL)3(S-PTTL-alkyne) (6) containing an alkyne
moiety. During the synthesis of this complex, one chiral ligand of the parent
Rh2(S-PTTL)4 catalyst is exchanged with an analogous chiral ligand system containing
an alkyne moiety, which to a great extent maintains the intrinsic catalytic performance
of the catalyst. The heterogeneous dirhodium catalyst is characterized by FT-IR
and 13C solid-state NMR to validate the successful immobilization. The catalytic
performance of the heterogeneous catalyst 8 is investigated in the asymmetric
cyclopropanation of 3-diazooxindole with different aryl alkenes that form spiro-cyclopropyloxindoles
which serve as precursors for pharmaceuticals. The resulting heterogeneous catalyst
shows high catalytic activity and significant enantioselectivity. Importantly,
it can be readily recovered and reused at least four times without significant
loss of its catalytic performance.
author:
- first_name: Zhenzhong
full_name: Li, Zhenzhong
last_name: Li
- first_name: Lorenz
full_name: Rösler, Lorenz
last_name: Rösler
- first_name: Till
full_name: Wissel, Till
last_name: Wissel
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: 'Li Z, Rösler L, Wissel T, Breitzke H, Gutmann T, Buntkowsky G. Immobilization
of a chiral dirhodium catalyst on SBA-15 via click-chemistry: Application in the
asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes. Journal of
CO2 Utilization. 2021;52:101682. doi:10.1016/j.jcou.2021.101682'
apa: 'Li, Z., Rösler, L., Wissel, T., Breitzke, H., Gutmann, T., & Buntkowsky,
G. (2021). Immobilization of a chiral dirhodium catalyst on SBA-15 via click-chemistry:
Application in the asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes.
Journal of CO2 Utilization, 52, 101682. https://doi.org/10.1016/j.jcou.2021.101682'
bibtex: '@article{Li_Rösler_Wissel_Breitzke_Gutmann_Buntkowsky_2021, title={Immobilization
of a chiral dirhodium catalyst on SBA-15 via click-chemistry: Application in the
asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes}, volume={52},
DOI={10.1016/j.jcou.2021.101682},
journal={Journal of CO2 Utilization}, author={Li, Zhenzhong and Rösler, Lorenz
and Wissel, Till and Breitzke, Hergen and Gutmann, Torsten and Buntkowsky, Gerd},
year={2021}, pages={101682} }'
chicago: 'Li, Zhenzhong, Lorenz Rösler, Till Wissel, Hergen Breitzke, Torsten Gutmann,
and Gerd Buntkowsky. “Immobilization of a Chiral Dirhodium Catalyst on SBA-15
via Click-Chemistry: Application in the Asymmetric Cyclopropanation of 3-Diazooxindole
with Aryl Alkenes.” Journal of CO2 Utilization 52 (2021): 101682. https://doi.org/10.1016/j.jcou.2021.101682.'
ieee: 'Z. Li, L. Rösler, T. Wissel, H. Breitzke, T. Gutmann, and G. Buntkowsky,
“Immobilization of a chiral dirhodium catalyst on SBA-15 via click-chemistry:
Application in the asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes,”
Journal of CO2 Utilization, vol. 52, p. 101682, 2021, doi: 10.1016/j.jcou.2021.101682.'
mla: 'Li, Zhenzhong, et al. “Immobilization of a Chiral Dirhodium Catalyst on SBA-15
via Click-Chemistry: Application in the Asymmetric Cyclopropanation of 3-Diazooxindole
with Aryl Alkenes.” Journal of CO2 Utilization, vol. 52, 2021, p. 101682,
doi:10.1016/j.jcou.2021.101682.'
short: Z. Li, L. Rösler, T. Wissel, H. Breitzke, T. Gutmann, G. Buntkowsky, Journal
of CO2 Utilization 52 (2021) 101682.
date_created: 2026-02-07T15:55:18Z
date_updated: 2026-02-17T16:15:35Z
doi: 10.1016/j.jcou.2021.101682
extern: '1'
intvolume: ' 52'
keyword:
- immobilized catalyst
- asymmetric cyclopropanation
- Chiral dirhodium
language:
- iso: eng
page: '101682'
publication: Journal of CO2 Utilization
status: public
title: 'Immobilization of a chiral dirhodium catalyst on SBA-15 via click-chemistry:
Application in the asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes'
type: journal_article
user_id: '100715'
volume: 52
year: '2021'
...
---
_id: '63993'
abstract:
- lang: eng
text: A synthetic strategy to β-silylphospholes with three methoxy, ethoxy, chloro,
hydrido, or phenyl substituents at silicon has been developed, starting from trimethoxy,
triethoxy, or triphenyl silyl substituted phenyl phosphanides and 1,4-diphenyl-1,3-butadiyne.
These trifunctional silylphospholes were attached to the surface of uniform spheric
silica particles (15 μm) and, for comparison, to a polyhedral silsesquioxane (POSS)–trisilanol
as a molecular model to explore their luminescent properties in comparison with
the free phospholes. Density functional theory calculations were performed to
investigate any electronic perturbation of the phosphole system by the trifunctional
silyl anchoring unit. For the immobilized phospholes, cross-polarization magic-angle-spinning
NMR measurements (13C, 29Si, and 31P) were carried out to explore the bonding
situation to the silica surface. Thermogravimetric analysis and X-ray photoelectron
spectroscopy measurements were performed to approximate the amount of phospholes
covering the silica surface. Identity and purity of all novel phospholes have
been established with standard techniques (multinuclear NMR, mass spectrometry,
and elemental analysis) and X-ray diffraction for the POSS derivative.
author:
- first_name: Dieter
full_name: Klintuch, Dieter
last_name: Klintuch
- first_name: Mark V.
full_name: Höfler, Mark V.
last_name: Höfler
- first_name: Till
full_name: Wissel, Till
last_name: Wissel
- first_name: Clemens
full_name: Bruhn, Clemens
last_name: Bruhn
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Rudolf
full_name: Pietschnig, Rudolf
last_name: Pietschnig
citation:
ama: Klintuch D, Höfler MV, Wissel T, Bruhn C, Gutmann T, Pietschnig R. Trifunctional
Silyl Groups as Anchoring Units in the Preparation of Luminescent Phosphole–Silica
Hybrids. Inorganic Chemistry. 2021;60(18):14263–14274. doi:10.1021/acs.inorgchem.1c01775
apa: Klintuch, D., Höfler, M. V., Wissel, T., Bruhn, C., Gutmann, T., & Pietschnig,
R. (2021). Trifunctional Silyl Groups as Anchoring Units in the Preparation of
Luminescent Phosphole–Silica Hybrids. Inorganic Chemistry, 60(18),
14263–14274. https://doi.org/10.1021/acs.inorgchem.1c01775
bibtex: '@article{Klintuch_Höfler_Wissel_Bruhn_Gutmann_Pietschnig_2021, title={Trifunctional
Silyl Groups as Anchoring Units in the Preparation of Luminescent Phosphole–Silica
Hybrids}, volume={60}, DOI={10.1021/acs.inorgchem.1c01775},
number={18}, journal={Inorganic Chemistry}, publisher={American Chemical Society},
author={Klintuch, Dieter and Höfler, Mark V. and Wissel, Till and Bruhn, Clemens
and Gutmann, Torsten and Pietschnig, Rudolf}, year={2021}, pages={14263–14274}
}'
chicago: 'Klintuch, Dieter, Mark V. Höfler, Till Wissel, Clemens Bruhn, Torsten
Gutmann, and Rudolf Pietschnig. “Trifunctional Silyl Groups as Anchoring Units
in the Preparation of Luminescent Phosphole–Silica Hybrids.” Inorganic Chemistry
60, no. 18 (2021): 14263–14274. https://doi.org/10.1021/acs.inorgchem.1c01775.'
ieee: 'D. Klintuch, M. V. Höfler, T. Wissel, C. Bruhn, T. Gutmann, and R. Pietschnig,
“Trifunctional Silyl Groups as Anchoring Units in the Preparation of Luminescent
Phosphole–Silica Hybrids,” Inorganic Chemistry, vol. 60, no. 18, pp. 14263–14274,
2021, doi: 10.1021/acs.inorgchem.1c01775.'
mla: Klintuch, Dieter, et al. “Trifunctional Silyl Groups as Anchoring Units in
the Preparation of Luminescent Phosphole–Silica Hybrids.” Inorganic Chemistry,
vol. 60, no. 18, American Chemical Society, 2021, pp. 14263–14274, doi:10.1021/acs.inorgchem.1c01775.
short: D. Klintuch, M.V. Höfler, T. Wissel, C. Bruhn, T. Gutmann, R. Pietschnig,
Inorganic Chemistry 60 (2021) 14263–14274.
date_created: 2026-02-07T15:47:54Z
date_updated: 2026-02-17T16:16:17Z
doi: 10.1021/acs.inorgchem.1c01775
extern: '1'
intvolume: ' 60'
issue: '18'
language:
- iso: eng
page: 14263–14274
publication: Inorganic Chemistry
publisher: American Chemical Society
status: public
title: Trifunctional Silyl Groups as Anchoring Units in the Preparation of Luminescent
Phosphole–Silica Hybrids
type: journal_article
user_id: '100715'
volume: 60
year: '2021'
...
---
_id: '63992'
abstract:
- lang: eng
text: Solid-state NMR combined with dynamic nuclear polarization (DNP NMR) is used
to study hydration processes in tricalcium silicate (Ca3SiO5, abbreviated as C3S)
samples. The studied C3S samples have experienced early stage hydration (1–30
h) and slow aging (9 years) processes. The appearance of Q3 and Q4 lines in the
29Si MAS and 1H → 29Si CP MAS NMR spectra obtained for partly hydrated C3S samples
indicated the formation of amorphous silica which corresponds to their carbonation,
which was corroborated by complementary FTIR data. Significant DNP signal enhancements
obtained for the studied samples allowed to further investigate the C3S carbonation
process in detail employing the 1H → 29Si CP MAS FSLG HETCOR technique. Finally,
DNP enhanced 1H → 13C CP MAS and 1H → 13C CP MAS FSLG HETCOR techniques enabled
to directly observe the formation of carbonate moieties in partly hydrated C3S
samples.
author:
- first_name: Vytautas
full_name: Klimavicius, Vytautas
last_name: Klimavicius
- first_name: Harald
full_name: Hilbig, Harald
last_name: Hilbig
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Klimavicius V, Hilbig H, Gutmann T, Buntkowsky G. Direct Observation of Carbonate
Formation in Partly Hydrated Tricalcium Silicate by Dynamic Nuclear Polarization
Enhanced NMR Spectroscopy. Journal of Physical Chemistry C. 2021;125(13):7321–7328.
doi:10.1021/acs.jpcc.0c10382
apa: Klimavicius, V., Hilbig, H., Gutmann, T., & Buntkowsky, G. (2021). Direct
Observation of Carbonate Formation in Partly Hydrated Tricalcium Silicate by Dynamic
Nuclear Polarization Enhanced NMR Spectroscopy. Journal of Physical Chemistry
C, 125(13), 7321–7328. https://doi.org/10.1021/acs.jpcc.0c10382
bibtex: '@article{Klimavicius_Hilbig_Gutmann_Buntkowsky_2021, title={Direct Observation
of Carbonate Formation in Partly Hydrated Tricalcium Silicate by Dynamic Nuclear
Polarization Enhanced NMR Spectroscopy}, volume={125}, DOI={10.1021/acs.jpcc.0c10382},
number={13}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Klimavicius, Vytautas and Hilbig, Harald and Gutmann, Torsten
and Buntkowsky, Gerd}, year={2021}, pages={7321–7328} }'
chicago: 'Klimavicius, Vytautas, Harald Hilbig, Torsten Gutmann, and Gerd Buntkowsky.
“Direct Observation of Carbonate Formation in Partly Hydrated Tricalcium Silicate
by Dynamic Nuclear Polarization Enhanced NMR Spectroscopy.” Journal of Physical
Chemistry C 125, no. 13 (2021): 7321–7328. https://doi.org/10.1021/acs.jpcc.0c10382.'
ieee: 'V. Klimavicius, H. Hilbig, T. Gutmann, and G. Buntkowsky, “Direct Observation
of Carbonate Formation in Partly Hydrated Tricalcium Silicate by Dynamic Nuclear
Polarization Enhanced NMR Spectroscopy,” Journal of Physical Chemistry C,
vol. 125, no. 13, pp. 7321–7328, 2021, doi: 10.1021/acs.jpcc.0c10382.'
mla: Klimavicius, Vytautas, et al. “Direct Observation of Carbonate Formation in
Partly Hydrated Tricalcium Silicate by Dynamic Nuclear Polarization Enhanced NMR
Spectroscopy.” Journal of Physical Chemistry C, vol. 125, no. 13, American
Chemical Society, 2021, pp. 7321–7328, doi:10.1021/acs.jpcc.0c10382.
short: V. Klimavicius, H. Hilbig, T. Gutmann, G. Buntkowsky, Journal of Physical
Chemistry C 125 (2021) 7321–7328.
date_created: 2026-02-07T15:47:39Z
date_updated: 2026-02-17T16:16:25Z
doi: 10.1021/acs.jpcc.0c10382
extern: '1'
intvolume: ' 125'
issue: '13'
language:
- iso: eng
page: 7321–7328
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: Direct Observation of Carbonate Formation in Partly Hydrated Tricalcium Silicate
by Dynamic Nuclear Polarization Enhanced NMR Spectroscopy
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '63982'
abstract:
- lang: eng
text: Polyethylene glycol (PEG) is gaining interest as an alternative green solvent
in chemical synthesis and processing. This report presents density and viscosity
data from 293.15 K to 358.15 K as well as self-diffusion coefficient data from
298.15 K to 358.15 K for oligomers of PEG from di- to nonaethylene glycol. The
results were obtained by extrapolation from measurement series where water, the
most common impurity in PEGs, was intentionally added in several increments. The
obtained results are carefully compared to literature data, which are widely available
only for density and viscosity, and only for the lower oligomers. Densities are
found to be linearly dependent on temperatures for all studied oligomers. The
temperature dependence of viscosity and self-diffusion coefficients show only
slight deviations from the Arrhenius equation over the investigated temperature
range. The activation energies obtained from the viscosity data agree well with
the activation energies from the self-diffusion coefficient data and appear to
be linearly dependent with respect to the number of ethylene oxide repeat units
in the PEG oligomer. This linearity combined with the observation that the pre-exponential
factor appears to be the same for all studied oligomers may serve as a tool to
estimate viscosities and self-diffusion coefficients for higher oligomers within
the investigated temperature range. The densities of the oligomers all fall within
a rather narrow range without a clear trend in homologous series.
author:
- first_name: Markus M.
full_name: Hoffmann, Markus M.
last_name: Hoffmann
- first_name: Rachel H.
full_name: Horowitz, Rachel H.
last_name: Horowitz
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Hoffmann MM, Horowitz RH, Gutmann T, Buntkowsky G. Densities, Viscosities,
and Self-Diffusion Coefficients of Ethylene Glycol Oligomers. Journal of Chemical
and Engineering Data. 2021;66(6):2480–2500. doi:10.1021/acs.jced.1c00101
apa: Hoffmann, M. M., Horowitz, R. H., Gutmann, T., & Buntkowsky, G. (2021).
Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers.
Journal of Chemical and Engineering Data, 66(6), 2480–2500. https://doi.org/10.1021/acs.jced.1c00101
bibtex: '@article{Hoffmann_Horowitz_Gutmann_Buntkowsky_2021, title={Densities, Viscosities,
and Self-Diffusion Coefficients of Ethylene Glycol Oligomers}, volume={66}, DOI={10.1021/acs.jced.1c00101},
number={6}, journal={Journal of Chemical and Engineering Data}, publisher={American
Chemical Society}, author={Hoffmann, Markus M. and Horowitz, Rachel H. and Gutmann,
Torsten and Buntkowsky, Gerd}, year={2021}, pages={2480–2500} }'
chicago: 'Hoffmann, Markus M., Rachel H. Horowitz, Torsten Gutmann, and Gerd Buntkowsky.
“Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers.”
Journal of Chemical and Engineering Data 66, no. 6 (2021): 2480–2500. https://doi.org/10.1021/acs.jced.1c00101.'
ieee: 'M. M. Hoffmann, R. H. Horowitz, T. Gutmann, and G. Buntkowsky, “Densities,
Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers,” Journal
of Chemical and Engineering Data, vol. 66, no. 6, pp. 2480–2500, 2021, doi:
10.1021/acs.jced.1c00101.'
mla: Hoffmann, Markus M., et al. “Densities, Viscosities, and Self-Diffusion Coefficients
of Ethylene Glycol Oligomers.” Journal of Chemical and Engineering Data,
vol. 66, no. 6, American Chemical Society, 2021, pp. 2480–2500, doi:10.1021/acs.jced.1c00101.
short: M.M. Hoffmann, R.H. Horowitz, T. Gutmann, G. Buntkowsky, Journal of Chemical
and Engineering Data 66 (2021) 2480–2500.
date_created: 2026-02-07T15:44:34Z
date_updated: 2026-02-17T16:16:55Z
doi: 10.1021/acs.jced.1c00101
extern: '1'
intvolume: ' 66'
issue: '6'
language:
- iso: eng
page: 2480–2500
publication: Journal of Chemical and Engineering Data
publisher: American Chemical Society
status: public
title: Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol
Oligomers
type: journal_article
user_id: '100715'
volume: 66
year: '2021'
...
---
_id: '63986'
abstract:
- lang: eng
text: 13C and 15N solid-state nuclear magnetic resonance (NMR) combined with dynamic
nuclear polarization (DNP) is used to investigate the structure of dye-doped biopolymer-based
materials that can be used in amplified spontaneous emission (ASE) experiments.
By comparing calligraphic paper prepared from cellulose and scaffolds prepared
from chitosan as substrates, differences in the interactions of the carrier material
with the dye molecule Calcofluor White are obtained. These are most probably induced
by structural changes of the carrier material due to its interaction with water
forming hydrogen bonds. Such structural differences may explain the obtained variation
of the emission wavelength of Calcofluor White doped on these substrates in ASE
experiments.
author:
- first_name: Mark V.
full_name: Höfler, Mark V.
last_name: Höfler
- first_name: Nicolai
full_name: Hoinka, Nicolai
last_name: Hoinka
- first_name: Timmy
full_name: Schäfer, Timmy
last_name: Schäfer
- first_name: Marilia
full_name: Horn, Marilia
last_name: Horn
- first_name: Fabien
full_name: Aussenac, Fabien
last_name: Aussenac
- first_name: Thomas
full_name: Fuhrmann-Lieker, Thomas
last_name: Fuhrmann-Lieker
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
citation:
ama: Höfler MV, Hoinka N, Schäfer T, et al. Light Amplification Materials Based
on Biopolymers Doped with Dye Molecules—Structural Insights from 15N and 13C Solid-State
Dynamic Nuclear Polarization. Journal of Physical Chemistry C. 2021;125(39):21550–21558.
doi:10.1021/acs.jpcc.1c06737
apa: Höfler, M. V., Hoinka, N., Schäfer, T., Horn, M., Aussenac, F., Fuhrmann-Lieker,
T., & Gutmann, T. (2021). Light Amplification Materials Based on Biopolymers
Doped with Dye Molecules—Structural Insights from 15N and 13C Solid-State Dynamic
Nuclear Polarization. Journal of Physical Chemistry C, 125(39),
21550–21558. https://doi.org/10.1021/acs.jpcc.1c06737
bibtex: '@article{Höfler_Hoinka_Schäfer_Horn_Aussenac_Fuhrmann-Lieker_Gutmann_2021,
title={Light Amplification Materials Based on Biopolymers Doped with Dye Molecules—Structural
Insights from 15N and 13C Solid-State Dynamic Nuclear Polarization}, volume={125},
DOI={10.1021/acs.jpcc.1c06737},
number={39}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Höfler, Mark V. and Hoinka, Nicolai and Schäfer, Timmy and Horn,
Marilia and Aussenac, Fabien and Fuhrmann-Lieker, Thomas and Gutmann, Torsten},
year={2021}, pages={21550–21558} }'
chicago: 'Höfler, Mark V., Nicolai Hoinka, Timmy Schäfer, Marilia Horn, Fabien Aussenac,
Thomas Fuhrmann-Lieker, and Torsten Gutmann. “Light Amplification Materials Based
on Biopolymers Doped with Dye Molecules—Structural Insights from 15N and 13C Solid-State
Dynamic Nuclear Polarization.” Journal of Physical Chemistry C 125, no.
39 (2021): 21550–21558. https://doi.org/10.1021/acs.jpcc.1c06737.'
ieee: 'M. V. Höfler et al., “Light Amplification Materials Based on Biopolymers
Doped with Dye Molecules—Structural Insights from 15N and 13C Solid-State Dynamic
Nuclear Polarization,” Journal of Physical Chemistry C, vol. 125, no. 39,
pp. 21550–21558, 2021, doi: 10.1021/acs.jpcc.1c06737.'
mla: Höfler, Mark V., et al. “Light Amplification Materials Based on Biopolymers
Doped with Dye Molecules—Structural Insights from 15N and 13C Solid-State Dynamic
Nuclear Polarization.” Journal of Physical Chemistry C, vol. 125, no. 39,
American Chemical Society, 2021, pp. 21550–21558, doi:10.1021/acs.jpcc.1c06737.
short: M.V. Höfler, N. Hoinka, T. Schäfer, M. Horn, F. Aussenac, T. Fuhrmann-Lieker,
T. Gutmann, Journal of Physical Chemistry C 125 (2021) 21550–21558.
date_created: 2026-02-07T15:45:54Z
date_updated: 2026-02-17T16:16:48Z
doi: 10.1021/acs.jpcc.1c06737
extern: '1'
intvolume: ' 125'
issue: '39'
language:
- iso: eng
page: 21550–21558
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: Light Amplification Materials Based on Biopolymers Doped with Dye Molecules—Structural
Insights from 15N and 13C Solid-State Dynamic Nuclear Polarization
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '63973'
abstract:
- lang: eng
text: A novel specific spin-labeling strategy for bioactive molecules is presented
for eptifibatide (integrilin) an antiplatelet aggregation inhibitor, which derives
from the venom of certain rattlesnakes. By specifically labeling the disulfide
bridge this molecule becomes accessible for analytical techniques such as Electron
Paramagnetic Resonance (EPR) and solid state Dynamic Nuclear Polarization (DNP).
The necessary spin-label was synthesized and inserted into the disulfide bridge
of eptifibatide via reductive followed by insertion by a double Michael addition
under physiological conditions. This procedure is universally applicable for disulfide
containing biomolecules and is expected to preserve their tertiary structure with
minimal change due to the small size of the label and restoring of the previous
disulfide connection. HPLC and MS analysis show the successful introduction of
the spin label and EPR spectroscopy confirms its activity. DNP-enhanced solid
state NMR experiments show signal enhancement factors of up to 19 in 13C CP MAS
experiments which corresponds to time saving factors of up to 361. This clearly
shows the high potential of our new spin labeling strategy for the introduction
of site selective radical spin labels into biomolecules and biosolids without
compromising its conformational integrity for structural investigations employing
solid-state DNP or advanced EPR techniques.
author:
- first_name: Kevin
full_name: Herr, Kevin
last_name: Herr
- first_name: Max
full_name: Fleckenstein, Max
last_name: Fleckenstein
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- first_name: Mark V.
full_name: Höfler, Mark V.
last_name: Höfler
- first_name: Henrike
full_name: Heise, Henrike
last_name: Heise
- first_name: Fabien
full_name: Aussenac, Fabien
last_name: Aussenac
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Michael
full_name: Reggelin, Michael
last_name: Reggelin
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Herr K, Fleckenstein M, Brodrecht M, et al. A novel strategy for site selective
spin-labeling to investigate bioactive entities by DNP and EPR spectroscopy. Scientific
Reports. 2021;11(1):13714. doi:10.1038/s41598-021-92975-6
apa: Herr, K., Fleckenstein, M., Brodrecht, M., Höfler, M. V., Heise, H., Aussenac,
F., Gutmann, T., Reggelin, M., & Buntkowsky, G. (2021). A novel strategy for
site selective spin-labeling to investigate bioactive entities by DNP and EPR
spectroscopy. Scientific Reports, 11(1), 13714. https://doi.org/10.1038/s41598-021-92975-6
bibtex: '@article{Herr_Fleckenstein_Brodrecht_Höfler_Heise_Aussenac_Gutmann_Reggelin_Buntkowsky_2021,
title={A novel strategy for site selective spin-labeling to investigate bioactive
entities by DNP and EPR spectroscopy}, volume={11}, DOI={10.1038/s41598-021-92975-6},
number={1}, journal={Scientific Reports}, author={Herr, Kevin and Fleckenstein,
Max and Brodrecht, Martin and Höfler, Mark V. and Heise, Henrike and Aussenac,
Fabien and Gutmann, Torsten and Reggelin, Michael and Buntkowsky, Gerd}, year={2021},
pages={13714} }'
chicago: 'Herr, Kevin, Max Fleckenstein, Martin Brodrecht, Mark V. Höfler, Henrike
Heise, Fabien Aussenac, Torsten Gutmann, Michael Reggelin, and Gerd Buntkowsky.
“A Novel Strategy for Site Selective Spin-Labeling to Investigate Bioactive Entities
by DNP and EPR Spectroscopy.” Scientific Reports 11, no. 1 (2021): 13714.
https://doi.org/10.1038/s41598-021-92975-6.'
ieee: 'K. Herr et al., “A novel strategy for site selective spin-labeling
to investigate bioactive entities by DNP and EPR spectroscopy,” Scientific
Reports, vol. 11, no. 1, p. 13714, 2021, doi: 10.1038/s41598-021-92975-6.'
mla: Herr, Kevin, et al. “A Novel Strategy for Site Selective Spin-Labeling to Investigate
Bioactive Entities by DNP and EPR Spectroscopy.” Scientific Reports, vol.
11, no. 1, 2021, p. 13714, doi:10.1038/s41598-021-92975-6.
short: K. Herr, M. Fleckenstein, M. Brodrecht, M.V. Höfler, H. Heise, F. Aussenac,
T. Gutmann, M. Reggelin, G. Buntkowsky, Scientific Reports 11 (2021) 13714.
date_created: 2026-02-07T15:41:36Z
date_updated: 2026-02-17T16:17:24Z
doi: 10.1038/s41598-021-92975-6
extern: '1'
intvolume: ' 11'
issue: '1'
language:
- iso: eng
page: '13714'
publication: Scientific Reports
status: public
title: A novel strategy for site selective spin-labeling to investigate bioactive
entities by DNP and EPR spectroscopy
type: journal_article
user_id: '100715'
volume: 11
year: '2021'
...
---
_id: '63947'
abstract:
- lang: eng
text: The interactions of molecules such as surfactants with solid interfaces are
not sufficiently understood since their study is challenging with standard spectroscopic
methods. In this work, octanol-d17 as a model system confined in the mesopores
of SBA-15 is studied by variable temperature deuterium solid-state NMR, and the
findings are compared to those of bulk octanol-d17. The magic angle spinning (MAS)
as well as the static, nonspinning case, are investigated, showing that the described
observations are independent of the applied NMR method. The 2H NMR spectra of
both the bulk and the confined octanol-d17 show a large and a small quadrupolar
Pake pattern below the melting point, suggesting a rigid conformation of the observed
molecules with a 3-fold jump motion of the terminal CD3-group. Apart from the
melting of the solid, no other phase transition is observed for either sample.
The confined octanol-d17 forms a pore solid, exhibiting a melting point 38 K lower
than bulk octanol-d17. The interactions of the molecule with the mesoporous SBA-15
bring about a distribution of activation energies for the melting process, resulting
in a gradual melting process.
author:
- first_name: Sonja C.
full_name: Döller, Sonja C.
last_name: Döller
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- first_name: Nadia B.
full_name: Haro Mares, Nadia B.
last_name: Haro Mares
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Markus
full_name: Hoffmann, Markus
last_name: Hoffmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Döller SC, Brodrecht M, Haro Mares NB, et al. Deuterium NMR Studies of the
Solid–Liquid Phase Transition of Octanol-d17 Confined in SBA-15. Journal of
Physical Chemistry C. 2021;125(45):25155–25164. doi:10.1021/acs.jpcc.1c05873
apa: Döller, S. C., Brodrecht, M., Haro Mares, N. B., Breitzke, H., Gutmann, T.,
Hoffmann, M., & Buntkowsky, G. (2021). Deuterium NMR Studies of the Solid–Liquid
Phase Transition of Octanol-d17 Confined in SBA-15. Journal of Physical Chemistry
C, 125(45), 25155–25164. https://doi.org/10.1021/acs.jpcc.1c05873
bibtex: '@article{Döller_Brodrecht_Haro Mares_Breitzke_Gutmann_Hoffmann_Buntkowsky_2021,
title={Deuterium NMR Studies of the Solid–Liquid Phase Transition of Octanol-d17
Confined in SBA-15}, volume={125}, DOI={10.1021/acs.jpcc.1c05873},
number={45}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Döller, Sonja C. and Brodrecht, Martin and Haro Mares, Nadia
B. and Breitzke, Hergen and Gutmann, Torsten and Hoffmann, Markus and Buntkowsky,
Gerd}, year={2021}, pages={25155–25164} }'
chicago: 'Döller, Sonja C., Martin Brodrecht, Nadia B. Haro Mares, Hergen Breitzke,
Torsten Gutmann, Markus Hoffmann, and Gerd Buntkowsky. “Deuterium NMR Studies
of the Solid–Liquid Phase Transition of Octanol-D17 Confined in SBA-15.” Journal
of Physical Chemistry C 125, no. 45 (2021): 25155–25164. https://doi.org/10.1021/acs.jpcc.1c05873.'
ieee: 'S. C. Döller et al., “Deuterium NMR Studies of the Solid–Liquid Phase
Transition of Octanol-d17 Confined in SBA-15,” Journal of Physical Chemistry
C, vol. 125, no. 45, pp. 25155–25164, 2021, doi: 10.1021/acs.jpcc.1c05873.'
mla: Döller, Sonja C., et al. “Deuterium NMR Studies of the Solid–Liquid Phase Transition
of Octanol-D17 Confined in SBA-15.” Journal of Physical Chemistry C, vol.
125, no. 45, American Chemical Society, 2021, pp. 25155–25164, doi:10.1021/acs.jpcc.1c05873.
short: S.C. Döller, M. Brodrecht, N.B. Haro Mares, H. Breitzke, T. Gutmann, M. Hoffmann,
G. Buntkowsky, Journal of Physical Chemistry C 125 (2021) 25155–25164.
date_created: 2026-02-07T09:12:35Z
date_updated: 2026-02-17T16:18:28Z
doi: 10.1021/acs.jpcc.1c05873
extern: '1'
intvolume: ' 125'
issue: '45'
language:
- iso: eng
page: 25155–25164
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: Deuterium NMR Studies of the Solid–Liquid Phase Transition of Octanol-d17 Confined
in SBA-15
type: journal_article
user_id: '100715'
volume: 125
year: '2021'
...
---
_id: '64275'
abstract:
- lang: eng
text: "Abstract\r\n We explain by
elementary means why the existence of a discrete series representation\r\nof a
real reductive group G implies the existence of a compact
Cartan subgroup of G. The presented approach has the
potential to generalize to real spherical spaces."
author:
- first_name: Bernhard
full_name: Krötz, Bernhard
last_name: Krötz
- first_name: Job J.
full_name: Kuit, Job J.
last_name: Kuit
- first_name: Eric M.
full_name: Opdam, Eric M.
last_name: Opdam
- first_name: Henrik
full_name: Schlichtkrull, Henrik
last_name: Schlichtkrull
citation:
ama: Krötz B, Kuit JJ, Opdam EM, Schlichtkrull H. Ellipticity and discrete series.
Journal für die reine und angewandte Mathematik (Crelles Journal). 2021;2022(782):109-119.
doi:10.1515/crelle-2021-0063
apa: Krötz, B., Kuit, J. J., Opdam, E. M., & Schlichtkrull, H. (2021). Ellipticity
and discrete series. Journal Für Die Reine Und Angewandte Mathematik (Crelles
Journal), 2022(782), 109–119. https://doi.org/10.1515/crelle-2021-0063
bibtex: '@article{Krötz_Kuit_Opdam_Schlichtkrull_2021, title={Ellipticity and discrete
series}, volume={2022}, DOI={10.1515/crelle-2021-0063},
number={782}, journal={Journal für die reine und angewandte Mathematik (Crelles
Journal)}, publisher={Walter de Gruyter GmbH}, author={Krötz, Bernhard and Kuit,
Job J. and Opdam, Eric M. and Schlichtkrull, Henrik}, year={2021}, pages={109–119}
}'
chicago: 'Krötz, Bernhard, Job J. Kuit, Eric M. Opdam, and Henrik Schlichtkrull.
“Ellipticity and Discrete Series.” Journal Für Die Reine Und Angewandte Mathematik
(Crelles Journal) 2022, no. 782 (2021): 109–19. https://doi.org/10.1515/crelle-2021-0063.'
ieee: 'B. Krötz, J. J. Kuit, E. M. Opdam, and H. Schlichtkrull, “Ellipticity and
discrete series,” Journal für die reine und angewandte Mathematik (Crelles
Journal), vol. 2022, no. 782, pp. 109–119, 2021, doi: 10.1515/crelle-2021-0063.'
mla: Krötz, Bernhard, et al. “Ellipticity and Discrete Series.” Journal Für Die
Reine Und Angewandte Mathematik (Crelles Journal), vol. 2022, no. 782, Walter
de Gruyter GmbH, 2021, pp. 109–19, doi:10.1515/crelle-2021-0063.
short: B. Krötz, J.J. Kuit, E.M. Opdam, H. Schlichtkrull, Journal Für Die Reine
Und Angewandte Mathematik (Crelles Journal) 2022 (2021) 109–119.
date_created: 2026-02-19T13:27:22Z
date_updated: 2026-02-19T13:27:34Z
doi: 10.1515/crelle-2021-0063
intvolume: ' 2022'
issue: '782'
language:
- iso: eng
page: 109-119
publication: Journal für die reine und angewandte Mathematik (Crelles Journal)
publication_identifier:
issn:
- 0075-4102
- 1435-5345
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Ellipticity and discrete series
type: journal_article
user_id: '52730'
volume: 2022
year: '2021'
...