An effective strategy for creating asymmetric MOFs for chirality induction: a chiral Zr-based MOF for enantioselective epoxidation

Autor:	Kayhaneh Berijani, Ali Morsali, Joseph T. Hupp
Rok vydání:	2019
Předmět:	010405 organic chemistry Ligand Enantioselective synthesis Epoxide 010402 general chemistry 01 natural sciences Combinatorial chemistry Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Lewis acids and bases Selectivity Chirality (chemistry) Enantiomeric excess
Zdroj:	Catalysis Science & Technology. 9:3388-3397
ISSN:	2044-4761 2044-4753
DOI:	10.1039/c9cy00565j
Popis:	Recently the construction of chiral MOFs (CMOFs) has been very challenging and complex. For the first time, we synthesized a chiral Zr-based MOF with L-tartaric acid by solvent-assisted ligand incorporation (SALI). We show that a CMOF can be postsynthetically generated by a simple method: incorporating chiral carboxylic groups on the achiral NU-1000. The post-synthesized chiral NU-1000 was used as an asymmetric support for producing a chiral catalyst with molybdenum catalytic active centers as Lewis acid sites. Enantioselective epoxidation of various prochiral alkens to epoxids by using [C-NU-1000-Mo] is comparable to that using other asymmetric homogeneous and heterogeneous catalysts, along with high enantiomeric excess and selectivity to epoxide (up to 100%). The CMOF could be reused in the styrene oxidation after five cycles without substantial deterioration in the CMOF crystallinity or catalytic performance.
Databáze:	OpenAIRE
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