TU Darmstadt / ULB / TUbiblio

Revealing Structure Reactivity Relationships in Heterogenized Dirhodium Catalysts by Solid-State NMR Techniques

Liu, Jiquan and Groszewicz, Pedro B. and Wen, Qingbo and Thankamony, Aany Sofia Lilly and Zhang, Bin and Kunz, Ulrike and Sauer, Grit and Xu, Yeping and Gutmann, Torsten and Buntkowsky, Gerd (2017):
Revealing Structure Reactivity Relationships in Heterogenized Dirhodium Catalysts by Solid-State NMR Techniques.
In: The Journal of Physical Chemistry C, ACS Publications, pp. 17409-17416, 121, (32), ISSN 1932-7447,
DOI: 10.1021/acs.jpcc.7b06807,
[Online-Edition: https://doi.org/10.1021/acs.jpcc.7b06807],
[Article]

Abstract

Heterogenized dirhodium catalysts were prepared by anchoring the rhodium(II) trifluoroacetate dimer (Rh2(TFA)4) (TFA = trifluoroacetate) on the surface of the SBA-15 material bearing either amine or amine and carboxyl groups. After basic characterizations, the binding geometries of the catalysts were analyzed by 13C CP MAS and 15N CP MAS DNP NMR. 19F MAS NMR measurements were employed to quantify active catalyst sites in the heterogenized catalysts, which enables one to understand their catalytic performance in the cyclopropanation model between styrene and ethyl diazoacetate (EDA). The heterogeneous nature of the catalysts was confirmed by leaching and recyclability tests.

Item Type: Article
Erschienen: 2017
Creators: Liu, Jiquan and Groszewicz, Pedro B. and Wen, Qingbo and Thankamony, Aany Sofia Lilly and Zhang, Bin and Kunz, Ulrike and Sauer, Grit and Xu, Yeping and Gutmann, Torsten and Buntkowsky, Gerd
Title: Revealing Structure Reactivity Relationships in Heterogenized Dirhodium Catalysts by Solid-State NMR Techniques
Language: English
Abstract:

Heterogenized dirhodium catalysts were prepared by anchoring the rhodium(II) trifluoroacetate dimer (Rh2(TFA)4) (TFA = trifluoroacetate) on the surface of the SBA-15 material bearing either amine or amine and carboxyl groups. After basic characterizations, the binding geometries of the catalysts were analyzed by 13C CP MAS and 15N CP MAS DNP NMR. 19F MAS NMR measurements were employed to quantify active catalyst sites in the heterogenized catalysts, which enables one to understand their catalytic performance in the cyclopropanation model between styrene and ethyl diazoacetate (EDA). The heterogeneous nature of the catalysts was confirmed by leaching and recyclability tests.

Journal or Publication Title: The Journal of Physical Chemistry C
Volume: 121
Number: 32
Publisher: ACS Publications
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Anorganische Chemie
Date Deposited: 15 Jan 2018 09:51
DOI: 10.1021/acs.jpcc.7b06807
Official URL: https://doi.org/10.1021/acs.jpcc.7b06807
Funders: Financial support by the Deutsche Forschungsgemeinschaft (DFG) under contracts Bu-911-20-1 (DNP spectrometer) and Bu-911-26-1 is gratefully acknowledged.
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item