Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 7, 2018
Previous Article Next Article

Identification of the key factor promoting the enrichment of chiral polymorph A in zeolite beta and the synthesis of chiral polymorph A highly enriched zeolite beta

Author affiliations

Abstract

Chiral zeolites with intrinsically chiral frameworks are highly desired due to their potential applications in asymmetric catalysis and enantioseparation. Zeolite beta is an intergrowth of chiral polymorph A and achiral polymorph B in a ratio of ca. 44 : 56. The synthesis of chiral polymorph A of zeolite beta or chiral polymorph A-enriched zeolite beta is one of the biggest challenges. By performing a series of control experiments, we identified the key factor promoting the enrichment of chiral polymorph A in pure-silica zeolite beta, i.e. the acidity of the initial mixture. With this discovery, we developed a generalized non-hydrofluoric acid-assisted synthesis route to synthesize polymorph A-enriched pure-silica zeolite beta. Zeolite beta crystals containing more than 70% chiral polymorph A were obtained. This acid assisted method could not only significantly enrich polymorph A in the crystals of pure-silica zeolite beta but also provide a way for avoiding the utilization of highly toxic concentrated hydrofluoric acid.

Graphical abstract: Identification of the key factor promoting the enrichment of chiral polymorph A in zeolite beta and the synthesis of chiral polymorph A highly enriched zeolite beta

Back to tab navigation

Supplementary files

Article information


Submitted
26 Mar 2018
Accepted
03 May 2018
First published
04 May 2018

Inorg. Chem. Front., 2018,5, 1640-1645
Article type
Research Article

Identification of the key factor promoting the enrichment of chiral polymorph A in zeolite beta and the synthesis of chiral polymorph A highly enriched zeolite beta

T. Lu, L. Zhu, X. Wang, W. Yan, W. Shi and R. Xu, Inorg. Chem. Front., 2018, 5, 1640
DOI: 10.1039/C8QI00265G

Social activity

Search articles by author

Spotlight

Advertisements