---
_id: '64062'
abstract:
- lang: eng
  text: Abstract Novel SBA-15-supported heterogeneous catalysts are synthesized and
    applied in the Mizoroki?Heck and the Suzuki?Miyaura cross-coupling reactions in
    green solvents like PEG or water. The structural properties of the products after
    each synthesis step are monitored by different analytics. The amount of amine/carboxyl
    groups and vanillin/histidine methyl ester and thermal stability are determined
    by TGA and elemental analysis, while ICP-OES delivered the amount of palladium
    of the catalysts. The morphology is investigated by SEM and XPS and confirms the
    presence of coordinated palladium in the zero-oxidation state. Gas adsorption
    analysis is conducted, which indicates the presence of palladium clusters in one
    of the two catalysts, which is underlined by BSE images combined with EDX. A detailed
    13C ssNMR and DNP-enhanced 15N ssNMR spectral analysis is presented, which provides
    ultimate proof of the successful syntheses of the catalysts. The coordination
    of the palladium onto the carrier material is shown by combining the NMR spectral
    results with the results of the other analytics. First catalytic tests show for
    the Mizoroki?Heck reaction yields up to nearly 100% and for the Suzuki-Miyaura
    up to 88% in the presence of PEG and water, respectively.
author:
- first_name: Till
  full_name: Wissel, Till
  last_name: Wissel
- first_name: Lorenz
  full_name: Rösler, Lorenz
  last_name: Rösler
- first_name: Martin
  full_name: Brodrecht, Martin
  last_name: Brodrecht
- first_name: Mark V.
  full_name: Höfler, Mark V.
  last_name: Höfler
- first_name: Kevin
  full_name: Herr, Kevin
  last_name: Herr
- first_name: Marcos
  full_name: Oliveira Jr., Marcos
  last_name: Oliveira Jr.
- first_name: Vytautas
  full_name: Klimavicius, Vytautas
  last_name: Klimavicius
- first_name: Martin
  full_name: Ebert, Martin
  last_name: Ebert
- first_name: Hergen
  full_name: Breitzke, Hergen
  last_name: Breitzke
- first_name: Markus
  full_name: Hoffmann, Markus
  last_name: Hoffmann
- first_name: Gerd
  full_name: Buntkowsky, Gerd
  last_name: Buntkowsky
- first_name: Torsten
  full_name: Gutmann, Torsten
  id: '118165'
  last_name: Gutmann
citation:
  ama: 'Wissel T, Rösler L, Brodrecht M, et al. Novel Heterogeneous Pd Catalysts for
    Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State
    NMR Techniques. <i>ChemCatChem</i>. 2024;17:e202401511. doi:<a href="https://doi.org/10.1002/cctc.202401511">10.1002/cctc.202401511</a>'
  apa: 'Wissel, T., Rösler, L., Brodrecht, M., Höfler, M. V., Herr, K., Oliveira Jr.,
    M., Klimavicius, V., Ebert, M., Breitzke, H., Hoffmann, M., Buntkowsky, G., &#38;
    Gutmann, T. (2024). Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions
    in Biocompatible Media: Structural Insights from Solid-State NMR Techniques. <i>ChemCatChem</i>,
    <i>17</i>, e202401511. <a href="https://doi.org/10.1002/cctc.202401511">https://doi.org/10.1002/cctc.202401511</a>'
  bibtex: '@article{Wissel_Rösler_Brodrecht_Höfler_Herr_Oliveira Jr._Klimavicius_Ebert_Breitzke_Hoffmann_et
    al._2024, title={Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions
    in Biocompatible Media: Structural Insights from Solid-State NMR Techniques},
    volume={17}, DOI={<a href="https://doi.org/10.1002/cctc.202401511">10.1002/cctc.202401511</a>},
    journal={ChemCatChem}, publisher={John Wiley &#38; Sons, Ltd}, author={Wissel,
    Till and Rösler, Lorenz and Brodrecht, Martin and Höfler, Mark V. and Herr, Kevin
    and Oliveira Jr., Marcos and Klimavicius, Vytautas and Ebert, Martin and Breitzke,
    Hergen and Hoffmann, Markus and et al.}, year={2024}, pages={e202401511} }'
  chicago: 'Wissel, Till, Lorenz Rösler, Martin Brodrecht, Mark V. Höfler, Kevin Herr,
    Marcos Oliveira Jr., Vytautas Klimavicius, et al. “Novel Heterogeneous Pd Catalysts
    for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from
    Solid-State NMR Techniques.” <i>ChemCatChem</i> 17 (2024): e202401511. <a href="https://doi.org/10.1002/cctc.202401511">https://doi.org/10.1002/cctc.202401511</a>.'
  ieee: 'T. Wissel <i>et al.</i>, “Novel Heterogeneous Pd Catalysts for Cross-Coupling
    Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques,”
    <i>ChemCatChem</i>, vol. 17, p. e202401511, 2024, doi: <a href="https://doi.org/10.1002/cctc.202401511">10.1002/cctc.202401511</a>.'
  mla: 'Wissel, Till, et al. “Novel Heterogeneous Pd Catalysts for Cross-Coupling
    Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques.”
    <i>ChemCatChem</i>, vol. 17, John Wiley &#38; Sons, Ltd, 2024, p. e202401511,
    doi:<a href="https://doi.org/10.1002/cctc.202401511">10.1002/cctc.202401511</a>.'
  short: T. Wissel, L. Rösler, M. Brodrecht, M.V. Höfler, K. Herr, M. Oliveira Jr.,
    V. Klimavicius, M. Ebert, H. Breitzke, M. Hoffmann, G. Buntkowsky, T. Gutmann,
    ChemCatChem 17 (2024) e202401511.
date_created: 2026-02-07T16:18:53Z
date_updated: 2026-02-17T16:12:41Z
doi: 10.1002/cctc.202401511
extern: '1'
intvolume: '        17'
keyword:
- SBA-15
- Heterogeneous catalyst
- Pd cross-coupling
- Polyethylene glycol
- Solid-state DNP NMR
language:
- iso: eng
page: e202401511
publication: ChemCatChem
publication_identifier:
  issn:
  - 1867-3880
publisher: John Wiley & Sons, Ltd
status: public
title: 'Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible
  Media: Structural Insights from Solid-State NMR Techniques'
type: journal_article
user_id: '100715'
volume: 17
year: '2024'
...
---
_id: '63948'
abstract:
- lang: eng
  text: In this work, the behavior of four different commercially available polarizing
    agents is investigated employing the non-ionic model surfactant 1-octanol as analyte.
    A relative method for the comparison of the proportion of the direct and indirect
    polarization transfer pathways is established, allowing a direct comparison of
    the polarization efficacy for different radicals and different parts of the 1-octanol
    molecule despite differences in radical concentration or sample amount. With this
    approach, it could be demonstrated that the hydrophilicity is a key factor in
    the way polarization is transferred from the polarizing agent to the analyte.
    These findings are confirmed by the determination of buildup times Tb, illustrating
    that the choice of polarizing agent plays an essential role in ensuring an optimal
    polarization transfer and therefore the maximum amount of enhancement possible
    for DNP enhanced NMR measurements.
author:
- first_name: Sonja C.
  full_name: Döller, Sonja C.
  last_name: Döller
- 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, Gutmann T, Hoffmann M, Buntkowsky G. A case study on the influence
    of hydrophilicity on the signal enhancement by dynamic nuclear polarization. <i>Solid
    State Nuclear Magnetic Resonance</i>. 2022;122:101829.
  apa: Döller, S. C., Gutmann, T., Hoffmann, M., &#38; Buntkowsky, G. (2022). A case
    study on the influence of hydrophilicity on the signal enhancement by dynamic
    nuclear polarization. <i>Solid State Nuclear Magnetic Resonance</i>, <i>122</i>,
    101829.
  bibtex: '@article{Döller_Gutmann_Hoffmann_Buntkowsky_2022, title={A case study on
    the influence of hydrophilicity on the signal enhancement by dynamic nuclear polarization},
    volume={122}, journal={Solid State Nuclear Magnetic Resonance}, author={Döller,
    Sonja C. and Gutmann, Torsten and Hoffmann, Markus and Buntkowsky, Gerd}, year={2022},
    pages={101829} }'
  chicago: 'Döller, Sonja C., Torsten Gutmann, Markus Hoffmann, and Gerd Buntkowsky.
    “A Case Study on the Influence of Hydrophilicity on the Signal Enhancement by
    Dynamic Nuclear Polarization.” <i>Solid State Nuclear Magnetic Resonance</i> 122
    (2022): 101829.'
  ieee: S. C. Döller, T. Gutmann, M. Hoffmann, and G. Buntkowsky, “A case study on
    the influence of hydrophilicity on the signal enhancement by dynamic nuclear polarization,”
    <i>Solid State Nuclear Magnetic Resonance</i>, vol. 122, p. 101829, 2022.
  mla: Döller, Sonja C., et al. “A Case Study on the Influence of Hydrophilicity on
    the Signal Enhancement by Dynamic Nuclear Polarization.” <i>Solid State Nuclear
    Magnetic Resonance</i>, vol. 122, 2022, p. 101829.
  short: S.C. Döller, T. Gutmann, M. Hoffmann, G. Buntkowsky, Solid State Nuclear
    Magnetic Resonance 122 (2022) 101829.
date_created: 2026-02-07T09:13:08Z
date_updated: 2026-02-17T16:18:26Z
extern: '1'
intvolume: '       122'
keyword:
- DNP NMR
- Dynamics
- Low temperature NMR
- Octanol
- Solid state NMR
- Surfactants
language:
- iso: eng
page: '101829'
publication: Solid State Nuclear Magnetic Resonance
status: public
title: A case study on the influence of hydrophilicity on the signal enhancement by
  dynamic nuclear polarization
type: journal_article
user_id: '100715'
volume: 122
year: '2022'
...