Journal
CHEMICAL COMMUNICATIONS
Volume 58, Issue 94, Pages 13111-13114Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc05149d
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Funding
- National Natural Science Foundation of China [22104145]
- Natural Science Foundation of Gansu Province [21JR7RA078]
- Light of West China'' Program from Chinese Academy of Science
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By synthesizing UiO-66-NH2@SiO2 with post-synthetic modification and utilizing the micropore structure of included metal organic frameworks, enhanced stereoselectivity for small enantiomers was achieved, leading to successful separation of alpha-amino acid and small alkaline enantiomers.
Herein, to overcome the challenges of enantiomerically separating small chiral molecules, UiO-66-NH2@SiO2 was synthesized and samples of it were functionalized using a simple post-synthetic modification strategy with (+)-diacetyl-l-tartaric anhydride (DATA) and dibenzoyl-(+)-tartaric acid (DBTA), respectively. Then, based on the domain-limiting effect from the regular micropore structure of the included metal organic frameworks, the obtained UiO-66-DATA@SiO2 and UiO-66-DBTA@SiO2 each exhibited enhanced stereoselectivity for small enantiomers and successfully achieved the separation of alpha-amino acid and small alkaline enantiomers. This study has provided a new concept for the design and synthesis of chiral materials for separating small-molecule enantiomers.
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