期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 41, 页码 18179-18183出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006844
关键词
asymmetric catalysis; chirality; enantioselectivity; intermetallic compounds; scanning probe microscopy
资金
- Swiss National Science Foundation under SNSF project [159690]
- NSF-Platform for the Accelerated Realization, Analysis and Discovery of Interface Materials (PARADIM) [DMR-1539918]
Enantioselectivity in heterogeneous catalysis strongly depends on the chirality transfer between catalyst surface and all reactants, intermediates, and the product along the reaction pathway. Herein we report the first enantioselective on-surface synthesis of molecular structures from an initial racemic mixture and without the need of enantiopure modifier molecules. The reaction consists of a trimerization via an unidentified bonding motif of prochiral 9-ethynylphenanthrene (9-EP) upon annealing to 500 K on the chiral Pd-3-terminated PdGa{111} surfaces into essentially enantiopure, homochiral 9-EP propellers. The observed behavior strongly contrasts the reaction of 9-EP on the chiral Pd-1-terminated PdGa{111} surfaces, where 9-EP monomers that are in nearly enantiopure configuration, dimerize without enantiomeric excess. Our findings demonstrate strong chiral recognition and a significant ensemble effect in the PdGa system, hence highlighting the huge potential of chiral intermetallic compounds for enantioselective synthesis and underlining the importance to control the catalytically active sites at the atomic level.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据