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Synthesis of chiral polymorph A-enriched zeolite Beta with an extremely concentrated fluoride route.

ABSTRACT: Chiral zeolitic materials with intrinsically chiral frameworks are highly desired because they can combine both shape selectivity and enantioselectivity. In the field of zeolite, the synthesis of chiral polymorph A of zeolite Beta or chiral polymorph A-enriched zeolite Beta is one of the biggest challenges. We demonstrate here a generalized extremely concentrated fluoride route for the synthesis of chiral polymorph A-enriched zeolite Beta in the presence of five achiral organic structure-directing agents. The polymorph A-enriched Ti-Beta shows a higher enantioselectivity for the asymmetric epoxidation of alkenes than the normal Ti-Beta.


PROVIDER: S-EPMC4476144 | BioStudies | 2015-01-01T00:00:00Z

REPOSITORIES: biostudies

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