---
_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: '64037'
abstract:
- lang: eng
text: Cross-linked thermosets are investigated by C-13 solid-state nuclear magnetic
resonance (NMR) spectroscopy to determine their structure and to distinguish important
epoxy resins and hardening agents. In addition to the epoxy resin and hardening
agent, the identification of phosphorus-containing flame retardants is demonstrated
by P-31 solid-state NMR. These studies provide a spectral database for routine
use, which is finally applied to analyze commercial products containing an unknown
multicomponent system.
author:
- first_name: T.
full_name: Schäfer, T.
last_name: Schäfer
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
citation:
ama: Schäfer T, Buntkowsky G, Gutmann T. Solid-State Nuclear Magnetic Resonance
as a Versatile Tool To Identify the Main Chemical Components of Epoxy-Based Thermosets.
ACS Omega. 2020;5(10):5412–5420. doi:10.1021/acsomega.9b04482
apa: Schäfer, T., Buntkowsky, G., & Gutmann, T. (2020). Solid-State Nuclear
Magnetic Resonance as a Versatile Tool To Identify the Main Chemical Components
of Epoxy-Based Thermosets. ACS Omega, 5(10), 5412–5420. https://doi.org/10.1021/acsomega.9b04482
bibtex: '@article{Schäfer_Buntkowsky_Gutmann_2020, title={Solid-State Nuclear Magnetic
Resonance as a Versatile Tool To Identify the Main Chemical Components of Epoxy-Based
Thermosets}, volume={5}, DOI={10.1021/acsomega.9b04482},
number={10}, journal={ACS Omega}, author={Schäfer, T. and Buntkowsky, G. and Gutmann,
Torsten}, year={2020}, pages={5412–5420} }'
chicago: 'Schäfer, T., G. Buntkowsky, and Torsten Gutmann. “Solid-State Nuclear
Magnetic Resonance as a Versatile Tool To Identify the Main Chemical Components
of Epoxy-Based Thermosets.” ACS Omega 5, no. 10 (2020): 5412–5420. https://doi.org/10.1021/acsomega.9b04482.'
ieee: 'T. Schäfer, G. Buntkowsky, and T. Gutmann, “Solid-State Nuclear Magnetic
Resonance as a Versatile Tool To Identify the Main Chemical Components of Epoxy-Based
Thermosets,” ACS Omega, vol. 5, no. 10, pp. 5412–5420, 2020, doi: 10.1021/acsomega.9b04482.'
mla: Schäfer, T., et al. “Solid-State Nuclear Magnetic Resonance as a Versatile
Tool To Identify the Main Chemical Components of Epoxy-Based Thermosets.” ACS
Omega, vol. 5, no. 10, 2020, pp. 5412–5420, doi:10.1021/acsomega.9b04482.
short: T. Schäfer, G. Buntkowsky, T. Gutmann, ACS Omega 5 (2020) 5412–5420.
date_created: 2026-02-07T16:08:30Z
date_updated: 2026-02-17T16:13:36Z
doi: 10.1021/acsomega.9b04482
extern: '1'
intvolume: ' 5'
issue: '10'
language:
- iso: eng
page: 5412–5420
publication: ACS Omega
status: public
title: Solid-State Nuclear Magnetic Resonance as a Versatile Tool To Identify the
Main Chemical Components of Epoxy-Based Thermosets
type: journal_article
user_id: '100715'
volume: 5
year: '2020'
...
---
_id: '64004'
abstract:
- lang: eng
text: Abstract A facile approach is reported for the preparation of dirhodium coordination
polymers [Rh2(L1)2]n (Rh2-L1) and [Rh2(L2)2]n (Rh2-L2; L1=N,N’-(pyromellitoyl)-bis-L-phenylalanine
diacid anion, L2=bis-N,N’-(L-phenylalanyl) naphthalene-1,4,5,8-tetracarboxylate
diimide) from chiral dicarboxylic acids by ligand exchange. Multiple techniques
including FTIR, XPS, and 1H→13C CP MAS NMR spectroscopy reveal the formation of
the coordination polymers. 19F MAS NMR was utilized to investigate the remaining
TFA groups in the obtained coordination polymers, and demonstrated near-quantitative
ligand exchange. DR-UV-vis and XPS confirm the oxidation state of the Rh center
and that the Rh-single bond in the dirhodium node is maintained in the synthesis
of Rh2-L1 and Rh2-L2. Both coordination polymers exhibit excellent catalytic performance
in the asymmetric cyclopropanation reaction between styrene and diazooxindole.
The catalysts can be easily recycled and reused 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: Kevin
full_name: Herr, Kevin
last_name: Herr
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- 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, Herr K, et al. Dirhodium Coordination Polymers for Asymmetric
Cyclopropanation of Diazooxindoles with Olefins: Synthesis and Spectroscopic Analysis.
ChemPlusChem. 2020;85(8):1737–1746. doi:10.1002/cplu.202000421'
apa: 'Li, Z., Rösler, L., Herr, K., Brodrecht, M., Breitzke, H., Hofmann, K., Limbach,
H.-H., Gutmann, T., & Buntkowsky, G. (2020). Dirhodium Coordination Polymers
for Asymmetric Cyclopropanation of Diazooxindoles with Olefins: Synthesis and
Spectroscopic Analysis. ChemPlusChem, 85(8), 1737–1746. https://doi.org/10.1002/cplu.202000421'
bibtex: '@article{Li_Rösler_Herr_Brodrecht_Breitzke_Hofmann_Limbach_Gutmann_Buntkowsky_2020,
title={Dirhodium Coordination Polymers for Asymmetric Cyclopropanation of Diazooxindoles
with Olefins: Synthesis and Spectroscopic Analysis}, volume={85}, DOI={10.1002/cplu.202000421},
number={8}, journal={ChemPlusChem}, author={Li, Zhenzhong and Rösler, Lorenz and
Herr, Kevin and Brodrecht, Martin and Breitzke, Hergen and Hofmann, Kathrin and
Limbach, Hans-Heinrich and Gutmann, Torsten and Buntkowsky, Gerd}, year={2020},
pages={1737–1746} }'
chicago: 'Li, Zhenzhong, Lorenz Rösler, Kevin Herr, Martin Brodrecht, Hergen Breitzke,
Kathrin Hofmann, Hans-Heinrich Limbach, Torsten Gutmann, and Gerd Buntkowsky.
“Dirhodium Coordination Polymers for Asymmetric Cyclopropanation of Diazooxindoles
with Olefins: Synthesis and Spectroscopic Analysis.” ChemPlusChem 85, no.
8 (2020): 1737–1746. https://doi.org/10.1002/cplu.202000421.'
ieee: 'Z. Li et al., “Dirhodium Coordination Polymers for Asymmetric Cyclopropanation
of Diazooxindoles with Olefins: Synthesis and Spectroscopic Analysis,” ChemPlusChem,
vol. 85, no. 8, pp. 1737–1746, 2020, doi: 10.1002/cplu.202000421.'
mla: 'Li, Zhenzhong, et al. “Dirhodium Coordination Polymers for Asymmetric Cyclopropanation
of Diazooxindoles with Olefins: Synthesis and Spectroscopic Analysis.” ChemPlusChem,
vol. 85, no. 8, 2020, pp. 1737–1746, doi:10.1002/cplu.202000421.'
short: Z. Li, L. Rösler, K. Herr, M. Brodrecht, H. Breitzke, K. Hofmann, H.-H. Limbach,
T. Gutmann, G. Buntkowsky, ChemPlusChem 85 (2020) 1737–1746.
date_created: 2026-02-07T15:54:32Z
date_updated: 2026-02-17T16:15:37Z
doi: 10.1002/cplu.202000421
extern: '1'
intvolume: ' 85'
issue: '8'
language:
- iso: eng
page: 1737–1746
publication: ChemPlusChem
publication_identifier:
issn:
- 2192-6506
status: public
title: 'Dirhodium Coordination Polymers for Asymmetric Cyclopropanation of Diazooxindoles
with Olefins: Synthesis and Spectroscopic Analysis'
type: journal_article
user_id: '100715'
volume: 85
year: '2020'
...
---
_id: '63985'
abstract:
- lang: eng
text: An experimental study is presented for the reverse micellar system of 15%
by mass polydisperse hexaethylene glycol monodecylether (C10E6) in cyclohexane
with varying amounts of added water up to 4% by mass. Measurements of viscosity
and self-diffusion coefficients were taken as a function of temperature between
10 and 45 °C at varying sample water loads but fixed C10E6/cyclohexane composition.
The results were used to inspect the validity of the Stokes–Einstein equation
for this system. Unreasonably small reverse average micelle radii and aggregation
numbers were obtained with the Stokes–Einstein equation, but reasonable values
for these quantities were obtained using the ratio of surfactant-to-cyclohexane
self-diffusion coefficients. While bulk viscosity increased with increasing water
load, a concurrent expected decrease of self-diffusion coefficient was only observed
for the surfactant and water but not for cyclohexane, which showed independence
of water load. Moreover, a spread of self-diffusion coefficients was observed
for the protons associated with the ethylene oxide repeat unit in samples with
polydisperse C10E6 but not in a sample with monodisperse C10E6. These findings
were interpreted by the presence of reverse micelle to reverse micelle hopping
motions that with higher water load become increasingly selective toward C10E6
molecules with short ethylene oxide repeat units, while those with long ethylene
oxide repeat units remain trapped within the reverse micelle because of the increased
hydrogen bonding interactions with the water inside the growing core of the reverse
micelle. Despite the observed breakdown of the Stokes–Einstein equation, the temperature
dependence of the viscosities and self-diffusion coefficients was found to follow
Arrhenius behavior over the investigated range of temperatures.
author:
- first_name: Markus M.
full_name: Hoffmann, Markus M.
last_name: Hoffmann
- first_name: Matthew D.
full_name: Too, Matthew D.
last_name: Too
- first_name: Michael
full_name: Vogel, Michael
last_name: Vogel
- 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, Too MD, Vogel M, Gutmann T, Buntkowsky G. Breakdown of the Stokes–Einstein
Equation for Solutions of Water in Oil Reverse Micelles. Journal of Physical
Chemistry B. 2020;124(41):9115–9125. doi:10.1021/acs.jpcb.0c06124
apa: Hoffmann, M. M., Too, M. D., Vogel, M., Gutmann, T., & Buntkowsky, G. (2020).
Breakdown of the Stokes–Einstein Equation for Solutions of Water in Oil Reverse
Micelles. Journal of Physical Chemistry B, 124(41), 9115–9125. https://doi.org/10.1021/acs.jpcb.0c06124
bibtex: '@article{Hoffmann_Too_Vogel_Gutmann_Buntkowsky_2020, title={Breakdown of
the Stokes–Einstein Equation for Solutions of Water in Oil Reverse Micelles},
volume={124}, DOI={10.1021/acs.jpcb.0c06124},
number={41}, journal={Journal of Physical Chemistry B}, publisher={American Chemical
Society}, author={Hoffmann, Markus M. and Too, Matthew D. and Vogel, Michael and
Gutmann, Torsten and Buntkowsky, Gerd}, year={2020}, pages={9115–9125} }'
chicago: 'Hoffmann, Markus M., Matthew D. Too, Michael Vogel, Torsten Gutmann, and
Gerd Buntkowsky. “Breakdown of the Stokes–Einstein Equation for Solutions of Water
in Oil Reverse Micelles.” Journal of Physical Chemistry B 124, no. 41 (2020):
9115–9125. https://doi.org/10.1021/acs.jpcb.0c06124.'
ieee: 'M. M. Hoffmann, M. D. Too, M. Vogel, T. Gutmann, and G. Buntkowsky, “Breakdown
of the Stokes–Einstein Equation for Solutions of Water in Oil Reverse Micelles,”
Journal of Physical Chemistry B, vol. 124, no. 41, pp. 9115–9125, 2020,
doi: 10.1021/acs.jpcb.0c06124.'
mla: Hoffmann, Markus M., et al. “Breakdown of the Stokes–Einstein Equation for
Solutions of Water in Oil Reverse Micelles.” Journal of Physical Chemistry
B, vol. 124, no. 41, American Chemical Society, 2020, pp. 9115–9125, doi:10.1021/acs.jpcb.0c06124.
short: M.M. Hoffmann, M.D. Too, M. Vogel, T. Gutmann, G. Buntkowsky, Journal of
Physical Chemistry B 124 (2020) 9115–9125.
date_created: 2026-02-07T15:45:38Z
date_updated: 2026-02-17T16:16:50Z
doi: 10.1021/acs.jpcb.0c06124
extern: '1'
intvolume: ' 124'
issue: '41'
language:
- iso: eng
page: 9115–9125
publication: Journal of Physical Chemistry B
publisher: American Chemical Society
status: public
title: Breakdown of the Stokes–Einstein Equation for Solutions of Water in Oil Reverse
Micelles
type: journal_article
user_id: '100715'
volume: 124
year: '2020'
...
---
_id: '63976'
abstract:
- lang: eng
text: Mesoporous silica materials (SBA-15) with surfaces modified with aminopropyltriethoxysilane
(APTES) of two different surface coverages were synthesized, and their structural
pore characteristics were analyzed. These two mesoporous silica materials were
impregnated with various solutions of radicals in a nonionic surfactant solvent.
Differential scanning calorimetry (DSC) analysis of the impregnated mesoporous
silica materials confirmed that the surfactant solutions were confined into the
pores. Dynamic nuclear polarization (DNP)-enhanced solid-state 13C magic-angle
spinning (MAS) NMR spectra recorded for these impregnated mesoporous silica materials
showed the presence of superimposed spectra from direct and indirect channel polarization
transfer processes not only for the confined surfactant solvent but also for the
APTES surface modification. The observation of the indirect channel resonances
implies that the surfactant solvents as well as the APTES exhibit molecular motions
with correlation times on the order of or faster than the inverse Larmor frequency.
Such motions are unexpected at the experimental temperature conditions of ∼120
K in particular for the immobilized APTES. Spectral line widths and intensities
of the observed 13C MAS NMR spectra were sensitive to the specific combination
of the radical, surfactant solvent, and APTES surface coverage. One particular
combination showed identical widths and intensities for the direct and the oppositely
phased indirect channel resonances, resulting in a blank spectrum. The differences
in line widths and intensities are discussed with respect to the structural organization
of the polarizing agent and surfactant within the pores and the complex interplay
of intermolecular interactions between these constituents.
author:
- first_name: Markus M.
full_name: Hoffmann, Markus M.
last_name: Hoffmann
- first_name: Sarah
full_name: Bothe, Sarah
last_name: Bothe
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- first_name: Vytautas
full_name: Klimavicius, Vytautas
last_name: Klimavicius
- first_name: Nadia B.
full_name: Haro-Mares, Nadia B.
last_name: Haro-Mares
- 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, Bothe S, Brodrecht M, et al. Direct and Indirect Dynamic Nuclear
Polarization Transfer Observed in Mesoporous Materials Impregnated with Nonionic
Surfactant Solutions of Polar Polarizing Agents. Journal of Physical Chemistry
C. 2020;124(9):5145–5156. doi:10.1021/acs.jpcc.9b10504
apa: Hoffmann, M. M., Bothe, S., Brodrecht, M., Klimavicius, V., Haro-Mares, N.
B., Gutmann, T., & Buntkowsky, G. (2020). Direct and Indirect Dynamic Nuclear
Polarization Transfer Observed in Mesoporous Materials Impregnated with Nonionic
Surfactant Solutions of Polar Polarizing Agents. Journal of Physical Chemistry
C, 124(9), 5145–5156. https://doi.org/10.1021/acs.jpcc.9b10504
bibtex: '@article{Hoffmann_Bothe_Brodrecht_Klimavicius_Haro-Mares_Gutmann_Buntkowsky_2020,
title={Direct and Indirect Dynamic Nuclear Polarization Transfer Observed in Mesoporous
Materials Impregnated with Nonionic Surfactant Solutions of Polar Polarizing Agents},
volume={124}, DOI={10.1021/acs.jpcc.9b10504},
number={9}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Hoffmann, Markus M. and Bothe, Sarah and Brodrecht, Martin and
Klimavicius, Vytautas and Haro-Mares, Nadia B. and Gutmann, Torsten and Buntkowsky,
Gerd}, year={2020}, pages={5145–5156} }'
chicago: 'Hoffmann, Markus M., Sarah Bothe, Martin Brodrecht, Vytautas Klimavicius,
Nadia B. Haro-Mares, Torsten Gutmann, and Gerd Buntkowsky. “Direct and Indirect
Dynamic Nuclear Polarization Transfer Observed in Mesoporous Materials Impregnated
with Nonionic Surfactant Solutions of Polar Polarizing Agents.” Journal of
Physical Chemistry C 124, no. 9 (2020): 5145–5156. https://doi.org/10.1021/acs.jpcc.9b10504.'
ieee: 'M. M. Hoffmann et al., “Direct and Indirect Dynamic Nuclear Polarization
Transfer Observed in Mesoporous Materials Impregnated with Nonionic Surfactant
Solutions of Polar Polarizing Agents,” Journal of Physical Chemistry C,
vol. 124, no. 9, pp. 5145–5156, 2020, doi: 10.1021/acs.jpcc.9b10504.'
mla: Hoffmann, Markus M., et al. “Direct and Indirect Dynamic Nuclear Polarization
Transfer Observed in Mesoporous Materials Impregnated with Nonionic Surfactant
Solutions of Polar Polarizing Agents.” Journal of Physical Chemistry C,
vol. 124, no. 9, American Chemical Society, 2020, pp. 5145–5156, doi:10.1021/acs.jpcc.9b10504.
short: M.M. Hoffmann, S. Bothe, M. Brodrecht, V. Klimavicius, N.B. Haro-Mares, T.
Gutmann, G. Buntkowsky, Journal of Physical Chemistry C 124 (2020) 5145–5156.
date_created: 2026-02-07T15:42:36Z
date_updated: 2026-02-17T16:17:17Z
doi: 10.1021/acs.jpcc.9b10504
extern: '1'
intvolume: ' 124'
issue: '9'
language:
- iso: eng
page: 5145–5156
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: Direct and Indirect Dynamic Nuclear Polarization Transfer Observed in Mesoporous
Materials Impregnated with Nonionic Surfactant Solutions of Polar Polarizing Agents
type: journal_article
user_id: '100715'
volume: 124
year: '2020'
...
---
_id: '63954'
abstract:
- lang: eng
text: We propose a mild and versatile synthesis protocol based on N-hydroxysuccinimide-activated
esters for the introduction of new functionalities to cellulose, using as starting
point established protocols for the tosylation of cellulose and its subsequent
reaction with a diamine linker. As a proof of concept, we describe the functionalization
of microcrystalline cellulose with a N-hydroxysuccinimide-activated ester of benzophenone,
a photoreactive functional group. Irradiation of the final product with UV light
yields a self-standing polymer film and is expected to result in cross-linking
among cellulose chains. To monitor structural changes at the molecular level,
each functionalization step is characterized by a multinuclear solid-state NMR
approach. DNP-enhanced 15N CP MAS NMR experiments reveal the formation of the
amide bond to the photoreactive linker and deliver further information about the
binding situation of nitrogen-containing groups in these materials. The flexible
synthesis protocol described here can be easily extended to a broad range of other
functionalities of interest, both for the cellulose and macromolecular research.
author:
- first_name: Pedro B.
full_name: Groszewicz, Pedro B.
last_name: Groszewicz
- first_name: Pedro
full_name: Mendes, Pedro
last_name: Mendes
- first_name: Bharti
full_name: Kumari, Bharti
last_name: Kumari
- first_name: Jonas
full_name: Lins, Jonas
last_name: Lins
- first_name: Markus
full_name: Biesalski, Markus
last_name: Biesalski
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: 'Groszewicz PB, Mendes P, Kumari B, et al. N-Hydroxysuccinimide-activated esters
as a functionalization agent for amino cellulose: synthesis and solid-state NMR
characterization. Cellulose. 2020;27:1239–1254. doi:10.1007/s10570-019-02864-5'
apa: 'Groszewicz, P. B., Mendes, P., Kumari, B., Lins, J., Biesalski, M., Gutmann,
T., & Buntkowsky, G. (2020). N-Hydroxysuccinimide-activated esters as a functionalization
agent for amino cellulose: synthesis and solid-state NMR characterization. Cellulose,
27, 1239–1254. https://doi.org/10.1007/s10570-019-02864-5'
bibtex: '@article{Groszewicz_Mendes_Kumari_Lins_Biesalski_Gutmann_Buntkowsky_2020,
title={N-Hydroxysuccinimide-activated esters as a functionalization agent for
amino cellulose: synthesis and solid-state NMR characterization}, volume={27},
DOI={10.1007/s10570-019-02864-5},
journal={Cellulose}, author={Groszewicz, Pedro B. and Mendes, Pedro and Kumari,
Bharti and Lins, Jonas and Biesalski, Markus and Gutmann, Torsten and Buntkowsky,
Gerd}, year={2020}, pages={1239–1254} }'
chicago: 'Groszewicz, Pedro B., Pedro Mendes, Bharti Kumari, Jonas Lins, Markus
Biesalski, Torsten Gutmann, and Gerd Buntkowsky. “N-Hydroxysuccinimide-Activated
Esters as a Functionalization Agent for Amino Cellulose: Synthesis and Solid-State
NMR Characterization.” Cellulose 27 (2020): 1239–1254. https://doi.org/10.1007/s10570-019-02864-5.'
ieee: 'P. B. Groszewicz et al., “N-Hydroxysuccinimide-activated esters as
a functionalization agent for amino cellulose: synthesis and solid-state NMR characterization,”
Cellulose, vol. 27, pp. 1239–1254, 2020, doi: 10.1007/s10570-019-02864-5.'
mla: 'Groszewicz, Pedro B., et al. “N-Hydroxysuccinimide-Activated Esters as a Functionalization
Agent for Amino Cellulose: Synthesis and Solid-State NMR Characterization.” Cellulose,
vol. 27, 2020, pp. 1239–1254, doi:10.1007/s10570-019-02864-5.'
short: P.B. Groszewicz, P. Mendes, B. Kumari, J. Lins, M. Biesalski, T. Gutmann,
G. Buntkowsky, Cellulose 27 (2020) 1239–1254.
date_created: 2026-02-07T15:35:03Z
date_updated: 2026-02-17T16:18:08Z
doi: 10.1007/s10570-019-02864-5
extern: '1'
intvolume: ' 27'
language:
- iso: eng
page: 1239–1254
publication: Cellulose
publication_identifier:
issn:
- 0969-0239
status: public
title: 'N-Hydroxysuccinimide-activated esters as a functionalization agent for amino
cellulose: synthesis and solid-state NMR characterization'
type: journal_article
user_id: '100715'
volume: 27
year: '2020'
...
---
_id: '63953'
abstract:
- lang: eng
text: Most porous polymers are notoriously hard to characterize due to their amorphous
and completely insoluble nature. On the other hand, they are an interesting class
of materials for sorption, catalytic, and electrode applications, thus they warrant
in-depth studies. In this contribution, we elaborate on the possibilities that
dynamic nuclear polarization offers towards the investigation of the structure
of porous polymers. We discuss the advantages and disadvantages of this technique
in the investigation of model polymers.
author:
- first_name: Sven
full_name: Grätz, Sven
last_name: Grätz
- first_name: Marcos
full_name: Olivera Junior, Marcos
last_name: Olivera Junior
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Lars
full_name: Borchardt, Lars
last_name: Borchardt
citation:
ama: Grätz S, Olivera Junior M, Gutmann T, Borchardt L. A comprehensive approach
for the characterization of porous polymers using 13C and 15N dynamic nuclear
polarization NMR spectroscopy. Physical Chemistry Chemical Physics. 2020;22(40):23307–23314.
doi:10.1039/D0CP04010J
apa: Grätz, S., Olivera Junior, M., Gutmann, T., & Borchardt, L. (2020). A comprehensive
approach for the characterization of porous polymers using 13C and 15N dynamic
nuclear polarization NMR spectroscopy. Physical Chemistry Chemical Physics,
22(40), 23307–23314. https://doi.org/10.1039/D0CP04010J
bibtex: '@article{Grätz_Olivera Junior_Gutmann_Borchardt_2020, title={A comprehensive
approach for the characterization of porous polymers using 13C and 15N dynamic
nuclear polarization NMR spectroscopy}, volume={22}, DOI={10.1039/D0CP04010J},
number={40}, journal={Physical Chemistry Chemical Physics}, publisher={The Royal
Society of Chemistry}, author={Grätz, Sven and Olivera Junior, Marcos and Gutmann,
Torsten and Borchardt, Lars}, year={2020}, pages={23307–23314} }'
chicago: 'Grätz, Sven, Marcos Olivera Junior, Torsten Gutmann, and Lars Borchardt.
“A Comprehensive Approach for the Characterization of Porous Polymers Using 13C
and 15N Dynamic Nuclear Polarization NMR Spectroscopy.” Physical Chemistry
Chemical Physics 22, no. 40 (2020): 23307–23314. https://doi.org/10.1039/D0CP04010J.'
ieee: 'S. Grätz, M. Olivera Junior, T. Gutmann, and L. Borchardt, “A comprehensive
approach for the characterization of porous polymers using 13C and 15N dynamic
nuclear polarization NMR spectroscopy,” Physical Chemistry Chemical Physics,
vol. 22, no. 40, pp. 23307–23314, 2020, doi: 10.1039/D0CP04010J.'
mla: Grätz, Sven, et al. “A Comprehensive Approach for the Characterization of Porous
Polymers Using 13C and 15N Dynamic Nuclear Polarization NMR Spectroscopy.” Physical
Chemistry Chemical Physics, vol. 22, no. 40, The Royal Society of Chemistry,
2020, pp. 23307–23314, doi:10.1039/D0CP04010J.
short: S. Grätz, M. Olivera Junior, T. Gutmann, L. Borchardt, Physical Chemistry
Chemical Physics 22 (2020) 23307–23314.
date_created: 2026-02-07T15:34:42Z
date_updated: 2026-02-17T16:18:14Z
doi: 10.1039/D0CP04010J
extern: '1'
intvolume: ' 22'
issue: '40'
language:
- iso: eng
page: 23307–23314
publication: Physical Chemistry Chemical Physics
publisher: The Royal Society of Chemistry
status: public
title: A comprehensive approach for the characterization of porous polymers using
13C and 15N dynamic nuclear polarization NMR spectroscopy
type: journal_article
user_id: '100715'
volume: 22
year: '2020'
...
---
_id: '64035'
abstract:
- lang: eng
text: Trityl and nitroxide radicals are connected by pi-topologically controlled
aryl linkers, generating genuinely g-engineered biradicals. They serve as a typical
model for biradicals in which the exchange (J) and hyperfine interactions compete
with the g-difference electronic Zeeman interactions. The magnetic properties
underlying the biradical spin Hamiltonian for solution, including J’s, have been
determined by multifrequency CW-ESR and H-1 ENDOR spectroscopy and compared with
those obtained by quantum chemical calculations. The experimental J values were
in good agreement with the quantum chemical calculations. The g-engineered biradicals
have been tested as a prototype for AWG (Arbitrary Wave Generator)-based spin
manipulation techniques, which enable GRAPE (GRAdient Pulse Engineering) microwave
control of spins in molecular magnetic resonance spectroscopy for use in molecular
spin quantum computers, demonstrating efficient signal enhancement of specific
weakened hyperfine signals. Dynamic nuclear polarization (DNP) effects of the
biradicals for 400 MHz nuclear magnetic resonance signal enhancement have been
examined, giving efficiency factors of 30 for H-1 and 27.8 for C-13 nuclei. The
marked DNP results show the feasibility of these biradicals for hyperpolarization.
author:
- first_name: K.
full_name: Sato, K.
last_name: Sato
- first_name: R.
full_name: Hirao, R.
last_name: Hirao
- first_name: I.
full_name: Timofeev, I.
last_name: Timofeev
- first_name: O.
full_name: Krumkacheva, O.
last_name: Krumkacheva
- first_name: E.
full_name: Zaytseva, E.
last_name: Zaytseva
- first_name: O.
full_name: Rogozhnikova, O.
last_name: Rogozhnikova
- first_name: V. M.
full_name: Tormyshev, V. M.
last_name: Tormyshev
- first_name: D.
full_name: Trukhin, D.
last_name: Trukhin
- first_name: E.
full_name: Bagryanskaya, E.
last_name: Bagryanskaya
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: C.
full_name: Klimavicius, C.
last_name: Klimavicius
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
- first_name: K.
full_name: Sugisaki, K.
last_name: Sugisaki
- first_name: S.
full_name: Nakazawa, S.
last_name: Nakazawa
- first_name: H.
full_name: Matsuoka, H.
last_name: Matsuoka
- first_name: K.
full_name: Toyota, K.
last_name: Toyota
- first_name: D.
full_name: Shiomi, D.
last_name: Shiomi
- first_name: T.
full_name: Takui, T.
last_name: Takui
citation:
ama: Sato K, Hirao R, Timofeev I, et al. Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered
Biradicals, As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR,
Arbitrary Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical
Calculations. Journal of Physical Chemistry A. 2019;123(34):7507–7517.
doi:10.1021/acs.jpca.9b07169
apa: Sato, K., Hirao, R., Timofeev, I., Krumkacheva, O., Zaytseva, E., Rogozhnikova,
O., Tormyshev, V. M., Trukhin, D., Bagryanskaya, E., Gutmann, T., Klimavicius,
C., Buntkowsky, G., Sugisaki, K., Nakazawa, S., Matsuoka, H., Toyota, K., Shiomi,
D., & Takui, T. (2019). Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered
Biradicals, As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR,
Arbitrary Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical
Calculations. Journal of Physical Chemistry A, 123(34), 7507–7517.
https://doi.org/10.1021/acs.jpca.9b07169
bibtex: '@article{Sato_Hirao_Timofeev_Krumkacheva_Zaytseva_Rogozhnikova_Tormyshev_Trukhin_Bagryanskaya_Gutmann_et
al._2019, title={Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered Biradicals,
As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR, Arbitrary
Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical Calculations},
volume={123}, DOI={10.1021/acs.jpca.9b07169},
number={34}, journal={Journal of Physical Chemistry A}, author={Sato, K. and Hirao,
R. and Timofeev, I. and Krumkacheva, O. and Zaytseva, E. and Rogozhnikova, O.
and Tormyshev, V. M. and Trukhin, D. and Bagryanskaya, E. and Gutmann, Torsten
and et al.}, year={2019}, pages={7507–7517} }'
chicago: 'Sato, K., R. Hirao, I. Timofeev, O. Krumkacheva, E. Zaytseva, O. Rogozhnikova,
V. M. Tormyshev, et al. “Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered Biradicals,
As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR, Arbitrary
Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical Calculations.”
Journal of Physical Chemistry A 123, no. 34 (2019): 7507–7517. https://doi.org/10.1021/acs.jpca.9b07169.'
ieee: 'K. Sato et al., “Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered
Biradicals, As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR,
Arbitrary Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical
Calculations,” Journal of Physical Chemistry A, vol. 123, no. 34, pp. 7507–7517,
2019, doi: 10.1021/acs.jpca.9b07169.'
mla: Sato, K., et al. “Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered Biradicals,
As Studied by Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR, Arbitrary
Wave Generator Pulse Microwave Waveform Spectroscopy, and Quantum Chemical Calculations.”
Journal of Physical Chemistry A, vol. 123, no. 34, 2019, pp. 7507–7517,
doi:10.1021/acs.jpca.9b07169.
short: K. Sato, R. Hirao, I. Timofeev, O. Krumkacheva, E. Zaytseva, O. Rogozhnikova,
V.M. Tormyshev, D. Trukhin, E. Bagryanskaya, T. Gutmann, C. Klimavicius, G. Buntkowsky,
K. Sugisaki, S. Nakazawa, H. Matsuoka, K. Toyota, D. Shiomi, T. Takui, Journal
of Physical Chemistry A 123 (2019) 7507–7517.
date_created: 2026-02-07T16:07:58Z
date_updated: 2026-02-17T16:13:42Z
doi: 10.1021/acs.jpca.9b07169
extern: '1'
intvolume: ' 123'
issue: '34'
language:
- iso: eng
page: 7507–7517
publication: Journal of Physical Chemistry A
status: public
title: Trityl-Aryl-Nitroxide-Based Genuinely g-Engineered Biradicals, As Studied by
Dynamic Nuclear Polarization, Multifrequency ESR/ENDOR, Arbitrary Wave Generator
Pulse Microwave Waveform Spectroscopy, and Quantum Chemical Calculations
type: journal_article
user_id: '100715'
volume: 123
year: '2019'
...
---
_id: '64038'
abstract:
- lang: eng
text: An efficient approach for the characterization of core–shell polymer hybrid
nanoparticles is presented. Selective signal amplification by dynamic nuclear
polarization (DNP) is employed to shed more light on the molecular structure of
surface sites and shell of the particles. DNP-enhanced 29Si solid-state NMR is
used to clearly prove the core–shell structure of the nanoparticles as well as
the success of their functionalization with low amounts of trimethylsiloxy groups.
By combination of DNP-enhanced 1H → 29Si and 1H → 13C cross-polarization magic-angle-spinning
experiments, differently substituted alkoxysilane moieties, namely, methacryloxypropyltriethoxysilane,
3-methacryloxypropyltriisopropoxysilane, and 3-methacryloxypropyltris(methoxyethoxy)silane,
are investigated, revealing various cross-linking capabilities of the particle
shell. This knowledge about efficiency of surface functionalization and cross-linking
sites strongly influences the application and properties of the core–shell polymer
hybrid particles, for instance, as materials for photonic crystals, particle film
formation, and coatings. This is of high importance for the design of tailor-made
core–shell particle architectures.
author:
- first_name: Timmy
full_name: Schäfer, Timmy
last_name: Schäfer
- first_name: Steffen
full_name: Vowinkel, Steffen
last_name: Vowinkel
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Markus
full_name: Gallei, Markus
last_name: Gallei
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
citation:
ama: Schäfer T, Vowinkel S, Breitzke H, Gallei M, Gutmann T. Selective DNP Signal
Amplification To Probe Structures of Core–Shell Polymer Hybrid Nanoparticles.
Journal of Physical Chemistry C. 2019;123(1):644–652. doi:10.1021/acs.jpcc.8b07969
apa: Schäfer, T., Vowinkel, S., Breitzke, H., Gallei, M., & Gutmann, T. (2019).
Selective DNP Signal Amplification To Probe Structures of Core–Shell Polymer Hybrid
Nanoparticles. Journal of Physical Chemistry C, 123(1), 644–652.
https://doi.org/10.1021/acs.jpcc.8b07969
bibtex: '@article{Schäfer_Vowinkel_Breitzke_Gallei_Gutmann_2019, title={Selective
DNP Signal Amplification To Probe Structures of Core–Shell Polymer Hybrid Nanoparticles},
volume={123}, DOI={10.1021/acs.jpcc.8b07969},
number={1}, journal={Journal of Physical Chemistry C}, publisher={American Chemical
Society}, author={Schäfer, Timmy and Vowinkel, Steffen and Breitzke, Hergen and
Gallei, Markus and Gutmann, Torsten}, year={2019}, pages={644–652} }'
chicago: 'Schäfer, Timmy, Steffen Vowinkel, Hergen Breitzke, Markus Gallei, and
Torsten Gutmann. “Selective DNP Signal Amplification To Probe Structures of Core–Shell
Polymer Hybrid Nanoparticles.” Journal of Physical Chemistry C 123, no.
1 (2019): 644–652. https://doi.org/10.1021/acs.jpcc.8b07969.'
ieee: 'T. Schäfer, S. Vowinkel, H. Breitzke, M. Gallei, and T. Gutmann, “Selective
DNP Signal Amplification To Probe Structures of Core–Shell Polymer Hybrid Nanoparticles,”
Journal of Physical Chemistry C, vol. 123, no. 1, pp. 644–652, 2019, doi:
10.1021/acs.jpcc.8b07969.'
mla: Schäfer, Timmy, et al. “Selective DNP Signal Amplification To Probe Structures
of Core–Shell Polymer Hybrid Nanoparticles.” Journal of Physical Chemistry
C, vol. 123, no. 1, American Chemical Society, 2019, pp. 644–652, doi:10.1021/acs.jpcc.8b07969.
short: T. Schäfer, S. Vowinkel, H. Breitzke, M. Gallei, T. Gutmann, Journal of Physical
Chemistry C 123 (2019) 644–652.
date_created: 2026-02-07T16:08:48Z
date_updated: 2026-02-17T16:13:34Z
doi: 10.1021/acs.jpcc.8b07969
extern: '1'
intvolume: ' 123'
issue: '1'
language:
- iso: eng
page: 644–652
publication: Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
publisher: American Chemical Society
status: public
title: Selective DNP Signal Amplification To Probe Structures of Core–Shell Polymer
Hybrid Nanoparticles
type: journal_article
user_id: '100715'
volume: 123
year: '2019'
...
---
_id: '64033'
abstract:
- lang: eng
text: Abstract The reactions of three metal nanoparticle (MNP) systems Ru/dppb,
RuPt/dppb, Pt/dppb (dppb=1,4-bis(diphenylphosphino)butane) with gaseous D2 at
room temperature and different gas pressures have been studied using 1H gas phase
NMR, GC-MS and solid state 13C and 31P MAS NMR. The main product is gaseous HD
arising from the reaction of D2 with surface hydrogen sites created during the
synthesis of the nanoparticles. In a side reaction, some of the dppb ligands are
decomposed producing surface phosphorus species and gaseous partially deuterated
butane and cyclohexane. These findings are fundamental for detailed studies of
the reaction kinetics of these particles towards H2 or D2 gas.
author:
- first_name: Niels
full_name: Rothermel, Niels
last_name: Rothermel
- first_name: Tobias
full_name: Röther, Tobias
last_name: Röther
- first_name: Tuğçe
full_name: Ayvalı, Tuğçe
last_name: Ayvalı
- first_name: Luis M.
full_name: Martínez-Prieto, Luis M.
last_name: Martínez-Prieto
- first_name: Karine
full_name: Philippot, Karine
last_name: Philippot
- first_name: Hans-Heinrich
full_name: Limbach, Hans-Heinrich
last_name: Limbach
- first_name: Bruno
full_name: Chaudret, Bruno
last_name: Chaudret
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Rothermel N, Röther T, Ayvalı T, et al. Reactions of D2 with 1,4-Bis(diphenylphosphino)
butane-Stabilized Metal Nanoparticles-A Combined Gas-phase NMR, GC-MS and Solid-state
NMR Study. ChemCatChem. 2019;11(5):1465–1471. doi:10.1002/cctc.201801981
apa: Rothermel, N., Röther, T., Ayvalı, T., Martínez-Prieto, L. M., Philippot, K.,
Limbach, H.-H., Chaudret, B., Gutmann, T., & Buntkowsky, G. (2019). Reactions
of D2 with 1,4-Bis(diphenylphosphino) butane-Stabilized Metal Nanoparticles-A
Combined Gas-phase NMR, GC-MS and Solid-state NMR Study. ChemCatChem, 11(5),
1465–1471. https://doi.org/10.1002/cctc.201801981
bibtex: '@article{Rothermel_Röther_Ayvalı_Martínez-Prieto_Philippot_Limbach_Chaudret_Gutmann_Buntkowsky_2019,
title={Reactions of D2 with 1,4-Bis(diphenylphosphino) butane-Stabilized Metal
Nanoparticles-A Combined Gas-phase NMR, GC-MS and Solid-state NMR Study}, volume={11},
DOI={10.1002/cctc.201801981},
number={5}, journal={ChemCatChem}, author={Rothermel, Niels and Röther, Tobias
and Ayvalı, Tuğçe and Martínez-Prieto, Luis M. and Philippot, Karine and Limbach,
Hans-Heinrich and Chaudret, Bruno and Gutmann, Torsten and Buntkowsky, Gerd},
year={2019}, pages={1465–1471} }'
chicago: 'Rothermel, Niels, Tobias Röther, Tuğçe Ayvalı, Luis M. Martínez-Prieto,
Karine Philippot, Hans-Heinrich Limbach, Bruno Chaudret, Torsten Gutmann, and
Gerd Buntkowsky. “Reactions of D2 with 1,4-Bis(Diphenylphosphino) Butane-Stabilized
Metal Nanoparticles-A Combined Gas-Phase NMR, GC-MS and Solid-State NMR Study.”
ChemCatChem 11, no. 5 (2019): 1465–1471. https://doi.org/10.1002/cctc.201801981.'
ieee: 'N. Rothermel et al., “Reactions of D2 with 1,4-Bis(diphenylphosphino)
butane-Stabilized Metal Nanoparticles-A Combined Gas-phase NMR, GC-MS and Solid-state
NMR Study,” ChemCatChem, vol. 11, no. 5, pp. 1465–1471, 2019, doi: 10.1002/cctc.201801981.'
mla: Rothermel, Niels, et al. “Reactions of D2 with 1,4-Bis(Diphenylphosphino) Butane-Stabilized
Metal Nanoparticles-A Combined Gas-Phase NMR, GC-MS and Solid-State NMR Study.”
ChemCatChem, vol. 11, no. 5, 2019, pp. 1465–1471, doi:10.1002/cctc.201801981.
short: N. Rothermel, T. Röther, T. Ayvalı, L.M. Martínez-Prieto, K. Philippot, H.-H.
Limbach, B. Chaudret, T. Gutmann, G. Buntkowsky, ChemCatChem 11 (2019) 1465–1471.
date_created: 2026-02-07T16:07:05Z
date_updated: 2026-02-17T16:13:47Z
doi: 10.1002/cctc.201801981
extern: '1'
intvolume: ' 11'
issue: '5'
language:
- iso: eng
page: 1465–1471
publication: ChemCatChem
status: public
title: Reactions of D2 with 1,4-Bis(diphenylphosphino) butane-Stabilized Metal Nanoparticles-A
Combined Gas-phase NMR, GC-MS and Solid-state NMR Study
type: journal_article
user_id: '100715'
volume: 11
year: '2019'
...
---
_id: '64018'
abstract:
- lang: eng
text: CO oxidation is an extensively studied reaction in heterogeneous catalysis
due to its seeming simplicity and its great importance for emission control. However,
the role of particle size and more specifically structure sensitivity in this
reaction is still controversial. In the present study, colloidal “surfactant-free”
Pt nanoparticles (NPs) in a size regime of 1–4 nm with narrow size distribution
and control over particle size were synthesized and subsequently supported on
Al2O3 to prepare model catalysts. CO oxidation was performed using Pt NPs catalysts
with particles sizes of 1, 2, 3, and 4 nm at different reaction temperatures.
It is shown that the reaction exhibits a particle size effect that depends strongly
on the reaction conditions. At 170 °C, the reaction seems to proceed within the
same kinetic regime for all particle sizes, but the surface normalized activity
depends strongly on the particle size, with maximum activity for nanoparticles
2 nm in diameter. A temperature increase to 200 °C leads to a change of the kinetic
regime that depends on the particle size. For Pt NPs 1 nm in diameter a reaction
order of 1 for O2 was observed, indicating that O2 adsorbs molecularly and dissociates
in a following step, which represents the generally accepted mechanism on Pt surfaces.
The reaction order of −1 for CO demonstrates that the surface is saturated with
CO under reaction conditions. With increasing particle size, the reaction orders
of O2 and CO change. For particles 2 nm in size, an increase in temperature also
results in reaction orders of 1 for O2 and −1 for CO; NPs of 3 and 4 nm, even
at higher temperatures, show no clear kinetic behavior that can be explained by
a single reaction mechanism. Instead, the Boudouard reaction between two adjacent
adsorbed CO molecules was identified as an important additional reaction pathway
that occurs preferentially on large particles and causes more complex kinetics.
author:
- first_name: Sarah
full_name: Neumann, Sarah
last_name: Neumann
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Stephen
full_name: Paul, Stephen
last_name: Paul
- first_name: Greg
full_name: Thiele, Greg
last_name: Thiele
- first_name: Heiko
full_name: Sievers, Heiko
last_name: Sievers
- first_name: Marcus
full_name: Bäumer, Marcus
last_name: Bäumer
- first_name: Sebastian
full_name: Kunz, Sebastian
last_name: Kunz
citation:
ama: Neumann S, Gutmann T, Buntkowsky G, et al. Insights into the reaction mechanism
and particle size effects of CO oxidation over supported Pt nanoparticle catalysts.
Journal of Catalysis. 2019;377:662–672. doi:10.1016/j.jcat.2019.07.049
apa: Neumann, S., Gutmann, T., Buntkowsky, G., Paul, S., Thiele, G., Sievers, H.,
Bäumer, M., & Kunz, S. (2019). Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts. Journal
of Catalysis, 377, 662–672. https://doi.org/10.1016/j.jcat.2019.07.049
bibtex: '@article{Neumann_Gutmann_Buntkowsky_Paul_Thiele_Sievers_Bäumer_Kunz_2019,
title={Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts}, volume={377}, DOI={10.1016/j.jcat.2019.07.049},
journal={Journal of Catalysis}, author={Neumann, Sarah and Gutmann, Torsten and
Buntkowsky, Gerd and Paul, Stephen and Thiele, Greg and Sievers, Heiko and Bäumer,
Marcus and Kunz, Sebastian}, year={2019}, pages={662–672} }'
chicago: 'Neumann, Sarah, Torsten Gutmann, Gerd Buntkowsky, Stephen Paul, Greg Thiele,
Heiko Sievers, Marcus Bäumer, and Sebastian Kunz. “Insights into the Reaction
Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle
Catalysts.” Journal of Catalysis 377 (2019): 662–672. https://doi.org/10.1016/j.jcat.2019.07.049.'
ieee: 'S. Neumann et al., “Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts,” Journal
of Catalysis, vol. 377, pp. 662–672, 2019, doi: 10.1016/j.jcat.2019.07.049.'
mla: Neumann, Sarah, et al. “Insights into the Reaction Mechanism and Particle Size
Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” Journal
of Catalysis, vol. 377, 2019, pp. 662–672, doi:10.1016/j.jcat.2019.07.049.
short: S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M.
Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 662–672.
date_created: 2026-02-07T16:02:06Z
date_updated: 2026-02-17T16:14:45Z
doi: 10.1016/j.jcat.2019.07.049
extern: '1'
intvolume: ' 377'
keyword:
- Solid state NMR
- “Surfactant-free” platinum nanoparticles
- CO oxidation
- Particle size effect
- Structure sensitivity
language:
- iso: eng
page: 662–672
publication: Journal of Catalysis
status: public
title: Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts
type: journal_article
user_id: '100715'
volume: 377
year: '2019'
...
---
_id: '64019'
abstract:
- lang: eng
text: A chiral zirconium-based catalyst, DUT-67-Pro containing 8-connected Zr6-clusters
is obtained by post synthetic functionalization of Zr6O6(OH)2(TDC)4(HCOO)2 (DUT-67,
TDC = 2,5-thiophenedicarboxylate) with the chiral monocarboxylic acid, L-proline.
13C and 15N solid state MAS and DNP NMR studies of DUT-67-Pro confirm the integration
of L-proline into the porous framework. The chiral MOF catalyst exhibits an excellent
catalytic activity at low temperature (298 K) with an unprecedented syn-(S,S)-product
selectivity in an asymmetric aldol addition reaction of cyclohexanone to 4-nitrobenzaldehyde
(yield = 95%, ee = 96%). Comparative catalytic studies using a molecular Zr6-cluster
model compound indicate the Zr6-moiety to be responsible for this inverse diastereoselectivity
compared to well-established L-proline organocatalysis and a mechanism is proposed
to explain the Zr6-cluster-mediated syn-selectivity. Masking residual acidic active
sites in the cluster of the framework was found to be a key prerequisite to achieve
the high enantioselectivity. The purely heterogeneous catalytic system based on
DUT-67-Pro is highly stable and can be recycled several times.
author:
- first_name: Khoa D.
full_name: Nguyen, Khoa D.
last_name: Nguyen
- first_name: Christel
full_name: Kutzscher, Christel
last_name: Kutzscher
- first_name: Sebastian
full_name: Ehrling, Sebastian
last_name: Ehrling
- first_name: Irena
full_name: Senkovska, Irena
last_name: Senkovska
- first_name: Volodymyr
full_name: Bon, Volodymyr
last_name: Bon
- first_name: Marcos
full_name: Oliveira, Marcos
last_name: Oliveira
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Stefan
full_name: Kaskel, Stefan
last_name: Kaskel
citation:
ama: Nguyen KD, Kutzscher C, Ehrling S, et al. Insights into the role of zirconium
in proline functionalized metal-organic frameworks attaining high enantio- and
diastereoselectivity. Journal of Catalysis. 2019;377:41–50. doi:10.1016/j.jcat.2019.07.003
apa: Nguyen, K. D., Kutzscher, C., Ehrling, S., Senkovska, I., Bon, V., Oliveira,
M., Gutmann, T., Buntkowsky, G., & Kaskel, S. (2019). Insights into the role
of zirconium in proline functionalized metal-organic frameworks attaining high
enantio- and diastereoselectivity. Journal of Catalysis, 377, 41–50.
https://doi.org/10.1016/j.jcat.2019.07.003
bibtex: '@article{Nguyen_Kutzscher_Ehrling_Senkovska_Bon_Oliveira_Gutmann_Buntkowsky_Kaskel_2019,
title={Insights into the role of zirconium in proline functionalized metal-organic
frameworks attaining high enantio- and diastereoselectivity}, volume={377}, DOI={10.1016/j.jcat.2019.07.003},
journal={Journal of Catalysis}, author={Nguyen, Khoa D. and Kutzscher, Christel
and Ehrling, Sebastian and Senkovska, Irena and Bon, Volodymyr and Oliveira, Marcos
and Gutmann, Torsten and Buntkowsky, Gerd and Kaskel, Stefan}, year={2019}, pages={41–50}
}'
chicago: 'Nguyen, Khoa D., Christel Kutzscher, Sebastian Ehrling, Irena Senkovska,
Volodymyr Bon, Marcos Oliveira, Torsten Gutmann, Gerd Buntkowsky, and Stefan Kaskel.
“Insights into the Role of Zirconium in Proline Functionalized Metal-Organic Frameworks
Attaining High Enantio- and Diastereoselectivity.” Journal of Catalysis
377 (2019): 41–50. https://doi.org/10.1016/j.jcat.2019.07.003.'
ieee: 'K. D. Nguyen et al., “Insights into the role of zirconium in proline
functionalized metal-organic frameworks attaining high enantio- and diastereoselectivity,”
Journal of Catalysis, vol. 377, pp. 41–50, 2019, doi: 10.1016/j.jcat.2019.07.003.'
mla: Nguyen, Khoa D., et al. “Insights into the Role of Zirconium in Proline Functionalized
Metal-Organic Frameworks Attaining High Enantio- and Diastereoselectivity.” Journal
of Catalysis, vol. 377, 2019, pp. 41–50, doi:10.1016/j.jcat.2019.07.003.
short: K.D. Nguyen, C. Kutzscher, S. Ehrling, I. Senkovska, V. Bon, M. Oliveira,
T. Gutmann, G. Buntkowsky, S. Kaskel, Journal of Catalysis 377 (2019) 41–50.
date_created: 2026-02-07T16:02:33Z
date_updated: 2026-02-17T16:14:42Z
doi: 10.1016/j.jcat.2019.07.003
extern: '1'
intvolume: ' 377'
keyword:
- -proline
- -selective aldol reaction
- Chirality
- Metal-organic framework
- Zirconium
language:
- iso: eng
page: 41–50
publication: Journal of Catalysis
status: public
title: Insights into the role of zirconium in proline functionalized metal-organic
frameworks attaining high enantio- and diastereoselectivity
type: journal_article
user_id: '100715'
volume: 377
year: '2019'
...
---
_id: '64023'
abstract:
- lang: eng
text: The structure of vanadium oxide (VOx) species in vanadium containing MCM-41
catalysts prepared by co-condensation or grafting, respectively, was investigated
by a combination of Raman scattering, UV-vis diffuse reflectance, ATR-IR, and
magic angle spinning (MAS) 51V as well as 29Si NMR spectroscopy techniques. Simulations
of the 51V MAS NMR spectra allowed the determination of chemical shift and quadrupole
tensor parameters, which give valuable information about the nature of the VOx
units. Structural transformations of the supported vanadium oxide species for
the catalyst in the dehydrated state and hydrated state were investigated to examine
the effect of water molecules on the VOx structures. The results reveal the presence
of different VOx structures for the hydrated samples, including dimeric species,
oligomeric chains and isolated trigonal pyramid units. Upon dehydration, the predominance
of oligomeric and/or dimeric units for the sample prepared by grafting was observed,
while a considerable amount of isolated units was additionally detected for the
sample prepared by co-condensation.
author:
- first_name: Marcos
full_name: Oliveira, Marcos
last_name: Oliveira
- first_name: Dominik
full_name: Seeburg, Dominik
last_name: Seeburg
- first_name: Jana
full_name: Weiß, Jana
last_name: Weiß
- first_name: Sebastian
full_name: Wohlrab, Sebastian
last_name: Wohlrab
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Ursula
full_name: Bentrup, Ursula
last_name: Bentrup
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
citation:
ama: Oliveira M, Seeburg D, Weiß J, et al. Structural characterization of vanadium
environments in MCM-41 molecular sieve catalysts by solid state 51V NMR. Catalysis
Science & Technology. 2019;9(21):6180–6190. doi:10.1039/C9CY01410A
apa: Oliveira, M., Seeburg, D., Weiß, J., Wohlrab, S., Buntkowsky, G., Bentrup,
U., & Gutmann, T. (2019). Structural characterization of vanadium environments
in MCM-41 molecular sieve catalysts by solid state 51V NMR. Catalysis Science
& Technology, 9(21), 6180–6190. https://doi.org/10.1039/C9CY01410A
bibtex: '@article{Oliveira_Seeburg_Weiß_Wohlrab_Buntkowsky_Bentrup_Gutmann_2019,
title={Structural characterization of vanadium environments in MCM-41 molecular
sieve catalysts by solid state 51V NMR}, volume={9}, DOI={10.1039/C9CY01410A},
number={21}, journal={Catalysis Science & Technology}, publisher={The Royal
Society of Chemistry}, author={Oliveira, Marcos and Seeburg, Dominik and Weiß,
Jana and Wohlrab, Sebastian and Buntkowsky, Gerd and Bentrup, Ursula and Gutmann,
Torsten}, year={2019}, pages={6180–6190} }'
chicago: 'Oliveira, Marcos, Dominik Seeburg, Jana Weiß, Sebastian Wohlrab, Gerd
Buntkowsky, Ursula Bentrup, and Torsten Gutmann. “Structural Characterization
of Vanadium Environments in MCM-41 Molecular Sieve Catalysts by Solid State 51V
NMR.” Catalysis Science & Technology 9, no. 21 (2019): 6180–6190. https://doi.org/10.1039/C9CY01410A.'
ieee: 'M. Oliveira et al., “Structural characterization of vanadium environments
in MCM-41 molecular sieve catalysts by solid state 51V NMR,” Catalysis Science
& Technology, vol. 9, no. 21, pp. 6180–6190, 2019, doi: 10.1039/C9CY01410A.'
mla: Oliveira, Marcos, et al. “Structural Characterization of Vanadium Environments
in MCM-41 Molecular Sieve Catalysts by Solid State 51V NMR.” Catalysis Science
& Technology, vol. 9, no. 21, The Royal Society of Chemistry, 2019, pp.
6180–6190, doi:10.1039/C9CY01410A.
short: M. Oliveira, D. Seeburg, J. Weiß, S. Wohlrab, G. Buntkowsky, U. Bentrup,
T. Gutmann, Catalysis Science & Technology 9 (2019) 6180–6190.
date_created: 2026-02-07T16:04:18Z
date_updated: 2026-02-17T16:14:18Z
doi: 10.1039/C9CY01410A
extern: '1'
intvolume: ' 9'
issue: '21'
language:
- iso: eng
page: 6180–6190
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
publisher: The Royal Society of Chemistry
status: public
title: Structural characterization of vanadium environments in MCM-41 molecular sieve
catalysts by solid state 51V NMR
type: journal_article
user_id: '100715'
volume: 9
year: '2019'
...
---
_id: '64001'
abstract:
- lang: eng
text: FSLG CPMAS HETCOR is a 2D solid-state NMR experiment which provides structural
information and conformational correlation between a 1H and an X-nucleus. However,
practical application of the experiment suffers from the chemical shift referencing
problem on the indirect 1H dimension. In our paper, we present a novel 1H–1H MAS
FSLG-based approach and its application to reference the FSLG CPMAS HETCOR which
overcomes the 1H referencing in the 2D 1H-X HETCOR experiment. This approach works
excellently irrespective of the sample type over a wide range of temperature.
author:
- first_name: Bharti
full_name: Kumari, Bharti
last_name: Kumari
- first_name: Martin
full_name: Brodrecht, Martin
last_name: Brodrecht
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Kumari B, Brodrecht M, Gutmann T, Breitzke H, Buntkowsky G. Efficient Referencing
of FSLG CPMAS HETCOR Spectra Using 2D 1H–1H MAS FSLG. Applied Magnetic Resonance.
2019;50(12):1399–1407. doi:10.1007/s00723-019-01156-2
apa: Kumari, B., Brodrecht, M., Gutmann, T., Breitzke, H., & Buntkowsky, G.
(2019). Efficient Referencing of FSLG CPMAS HETCOR Spectra Using 2D 1H–1H MAS
FSLG. Applied Magnetic Resonance, 50(12), 1399–1407. https://doi.org/10.1007/s00723-019-01156-2
bibtex: '@article{Kumari_Brodrecht_Gutmann_Breitzke_Buntkowsky_2019, title={Efficient
Referencing of FSLG CPMAS HETCOR Spectra Using 2D 1H–1H MAS FSLG}, volume={50},
DOI={10.1007/s00723-019-01156-2},
number={12}, journal={Applied Magnetic Resonance}, author={Kumari, Bharti and
Brodrecht, Martin and Gutmann, Torsten and Breitzke, Hergen and Buntkowsky, Gerd},
year={2019}, pages={1399–1407} }'
chicago: 'Kumari, Bharti, Martin Brodrecht, Torsten Gutmann, Hergen Breitzke, and
Gerd Buntkowsky. “Efficient Referencing of FSLG CPMAS HETCOR Spectra Using 2D
1H–1H MAS FSLG.” Applied Magnetic Resonance 50, no. 12 (2019): 1399–1407.
https://doi.org/10.1007/s00723-019-01156-2.'
ieee: 'B. Kumari, M. Brodrecht, T. Gutmann, H. Breitzke, and G. Buntkowsky, “Efficient
Referencing of FSLG CPMAS HETCOR Spectra Using 2D 1H–1H MAS FSLG,” Applied
Magnetic Resonance, vol. 50, no. 12, pp. 1399–1407, 2019, doi: 10.1007/s00723-019-01156-2.'
mla: Kumari, Bharti, et al. “Efficient Referencing of FSLG CPMAS HETCOR Spectra
Using 2D 1H–1H MAS FSLG.” Applied Magnetic Resonance, vol. 50, no. 12,
2019, pp. 1399–1407, doi:10.1007/s00723-019-01156-2.
short: B. Kumari, M. Brodrecht, T. Gutmann, H. Breitzke, G. Buntkowsky, Applied
Magnetic Resonance 50 (2019) 1399–1407.
date_created: 2026-02-07T15:53:21Z
date_updated: 2026-02-17T16:15:43Z
doi: 10.1007/s00723-019-01156-2
extern: '1'
intvolume: ' 50'
issue: '12'
language:
- iso: eng
page: 1399–1407
publication: Applied Magnetic Resonance
publication_identifier:
issn:
- 1613-7507
status: public
title: Efficient Referencing of FSLG CPMAS HETCOR Spectra Using 2D 1H–1H MAS FSLG
type: journal_article
user_id: '100715'
volume: 50
year: '2019'
...
---
_id: '63991'
abstract:
- lang: eng
text: A series of 1 and 2 nm sized platinum nanoparticles (Pt-NPs) deposited on
different support materials, namely, gamma-alumina (gamma-Al2O3), titanium dioxide
(TiO2), silicon dioxide (SiO2) and fumed silica are investigated by solid-state
NMR and dynamic nuclear polarization enhanced NMR spectroscopy (DNP). DNP signal
enhancement factors up to 170 enable gaining deeper insight into the surface chemistry
of Pt-NPs. Carbon monoxide is used as a probe molecule to analyze the adsorption
process and the surface chemistry on the supported Pt-NPs. The studied systems
show significant catalytic activity in carbon monoxide oxidation on their surface
at room temperature. The underlying catalytic mechanism is the water-gas shift
reaction. In the case of alumina as the support the produced CO2 reacts with the
surface to form carbonate, which is revealed by solid-state NMR. A similar carbonate
formation is also observed when physical mixtures of neat alumina with silica,
fumed silica and titania supported Pt-NPs are studied.
author:
- first_name: V.
full_name: Klimavicius, V.
last_name: Klimavicius
- first_name: S.
full_name: Neumann, S.
last_name: Neumann
- first_name: S.
full_name: Kunz, S.
last_name: Kunz
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
citation:
ama: Klimavicius V, Neumann S, Kunz S, Gutmann T, Buntkowsky G. Room temperature
CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state NMR
and DNP spectroscopy. Catalysis Science & Technology. 2019;9(14):3743–3752.
doi:10.1039/c9cy00684b
apa: Klimavicius, V., Neumann, S., Kunz, S., Gutmann, T., & Buntkowsky, G. (2019).
Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy. Catalysis Science & Technology,
9(14), 3743–3752. https://doi.org/10.1039/c9cy00684b
bibtex: '@article{Klimavicius_Neumann_Kunz_Gutmann_Buntkowsky_2019, title={Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy}, volume={9}, DOI={10.1039/c9cy00684b},
number={14}, journal={Catalysis Science & Technology}, author={Klimavicius,
V. and Neumann, S. and Kunz, S. and Gutmann, Torsten and Buntkowsky, G.}, year={2019},
pages={3743–3752} }'
chicago: 'Klimavicius, V., S. Neumann, S. Kunz, Torsten Gutmann, and G. Buntkowsky.
“Room Temperature CO Oxidation Catalysed by Supported Pt Nanoparticles Revealed
by Solid-State NMR and DNP Spectroscopy.” Catalysis Science & Technology
9, no. 14 (2019): 3743–3752. https://doi.org/10.1039/c9cy00684b.'
ieee: 'V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, and G. Buntkowsky, “Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy,” Catalysis Science & Technology, vol. 9,
no. 14, pp. 3743–3752, 2019, doi: 10.1039/c9cy00684b.'
mla: Klimavicius, V., et al. “Room Temperature CO Oxidation Catalysed by Supported
Pt Nanoparticles Revealed by Solid-State NMR and DNP Spectroscopy.” Catalysis
Science & Technology, vol. 9, no. 14, 2019, pp. 3743–3752, doi:10.1039/c9cy00684b.
short: V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, G. Buntkowsky, Catalysis
Science & Technology 9 (2019) 3743–3752.
date_created: 2026-02-07T15:47:21Z
date_updated: 2026-02-17T16:16:33Z
doi: 10.1039/c9cy00684b
extern: '1'
intvolume: ' 9'
issue: '14'
keyword:
- Chemistry
- gamma-alumina
- hydrogenation
- silica
- c-13
- interactions
- metal-catalysts
- particle-size
- platinum nanoparticles
- sites
- surface
- water-gas shift
language:
- iso: eng
page: 3743–3752
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
status: public
title: Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy
type: journal_article
user_id: '100715'
volume: 9
year: '2019'
...
---
_id: '63969'
abstract:
- lang: eng
text: A number of Ir-N-heterocyclic carbene (Ir-NHC) complexes with asymmetric N-heterocyclic
carbene (NHC) ligands have been prepared and examined for signal amplification
by reversible exchange (SABRE). Pyridine was chosen as model compound for hyperpolarization
experiments. This substrate was examined in a solvent mixture using several Ir-NHC
complexes, which differ in their NHC ligands. The SABRE polarization was created
at 6mT and the H-1 nuclear magnetic resonancesignals were detected at 7T. We show
that asymmetric NHC ligands, because of their favorable chemistry, can adapt the
SABREactive complexes to different chemical scenarios.
author:
- first_name: S.
full_name: Hadjiali, S.
last_name: Hadjiali
- first_name: R.
full_name: Savka, R.
last_name: Savka
- first_name: M.
full_name: Plaumann, M.
last_name: Plaumann
- first_name: U.
full_name: Bommerich, U.
last_name: Bommerich
- first_name: S.
full_name: Bothe, S.
last_name: Bothe
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: T.
full_name: Ratajczyk, T.
last_name: Ratajczyk
- first_name: J.
full_name: Bernarding, J.
last_name: Bernarding
- first_name: H. H.
full_name: Limbach, H. H.
last_name: Limbach
- first_name: H.
full_name: Plenio, H.
last_name: Plenio
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
citation:
ama: Hadjiali S, Savka R, Plaumann M, et al. Substituent Influences on the NMR Signal
Amplification of Ir Complexes with Heterocyclic Carbene Ligands. Applied Magnetic
Resonance. 2019;50(7):895–902. doi:10.1007/s00723-019-01115-x
apa: Hadjiali, S., Savka, R., Plaumann, M., Bommerich, U., Bothe, S., Gutmann, T.,
Ratajczyk, T., Bernarding, J., Limbach, H. H., Plenio, H., & Buntkowsky, G.
(2019). Substituent Influences on the NMR Signal Amplification of Ir Complexes
with Heterocyclic Carbene Ligands. Applied Magnetic Resonance, 50(7),
895–902. https://doi.org/10.1007/s00723-019-01115-x
bibtex: '@article{Hadjiali_Savka_Plaumann_Bommerich_Bothe_Gutmann_Ratajczyk_Bernarding_Limbach_Plenio_et
al._2019, title={Substituent Influences on the NMR Signal Amplification of Ir
Complexes with Heterocyclic Carbene Ligands}, volume={50}, DOI={10.1007/s00723-019-01115-x},
number={7}, journal={Applied Magnetic Resonance}, author={Hadjiali, S. and Savka,
R. and Plaumann, M. and Bommerich, U. and Bothe, S. and Gutmann, Torsten and Ratajczyk,
T. and Bernarding, J. and Limbach, H. H. and Plenio, H. and et al.}, year={2019},
pages={895–902} }'
chicago: 'Hadjiali, S., R. Savka, M. Plaumann, U. Bommerich, S. Bothe, Torsten Gutmann,
T. Ratajczyk, et al. “Substituent Influences on the NMR Signal Amplification of
Ir Complexes with Heterocyclic Carbene Ligands.” Applied Magnetic Resonance
50, no. 7 (2019): 895–902. https://doi.org/10.1007/s00723-019-01115-x.'
ieee: 'S. Hadjiali et al., “Substituent Influences on the NMR Signal Amplification
of Ir Complexes with Heterocyclic Carbene Ligands,” Applied Magnetic Resonance,
vol. 50, no. 7, pp. 895–902, 2019, doi: 10.1007/s00723-019-01115-x.'
mla: Hadjiali, S., et al. “Substituent Influences on the NMR Signal Amplification
of Ir Complexes with Heterocyclic Carbene Ligands.” Applied Magnetic Resonance,
vol. 50, no. 7, 2019, pp. 895–902, doi:10.1007/s00723-019-01115-x.
short: S. Hadjiali, R. Savka, M. Plaumann, U. Bommerich, S. Bothe, T. Gutmann, T.
Ratajczyk, J. Bernarding, H.H. Limbach, H. Plenio, G. Buntkowsky, Applied Magnetic
Resonance 50 (2019) 895–902.
date_created: 2026-02-07T15:40:18Z
date_updated: 2026-02-17T16:17:34Z
doi: 10.1007/s00723-019-01115-x
extern: '1'
intvolume: ' 50'
issue: '7'
keyword:
- dynamic nuclear-polarization
- hyperpolarization
- enhancement
- hydrogen induced polarization
- olefin-metathesis catalysts
- parahydrogen-induced polarization
- peptides
- Physics
- sabre
- spectroscopy
language:
- iso: eng
page: 895–902
publication: Applied Magnetic Resonance
publication_identifier:
issn:
- 1613-7507
status: public
title: Substituent Influences on the NMR Signal Amplification of Ir Complexes with
Heterocyclic Carbene Ligands
type: journal_article
user_id: '100715'
volume: 50
year: '2019'
...