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We thank the National Natural Science Foundation of China (grant nos. 20476046, 20771059) and the “Qinglan” Project of Jiangsu Province for Young Researchers.
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Communication
Heteropolyanion-Based Ionic Liquids: Reaction-Induced Self-Separation Catalysts for Esterification†
Article first published online: 3 DEC 2008
DOI: 10.1002/anie.200803567
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Leng, Y., Wang, J., Zhu, D., Ren, X., Ge, H. and Shen, L. (2009), Heteropolyanion-Based Ionic Liquids: Reaction-Induced Self-Separation Catalysts for Esterification. Angewandte Chemie International Edition, 48: 168–171. doi: 10.1002/anie.200803567
- †
Publication History
- Issue published online: 18 DEC 2008
- Article first published online: 3 DEC 2008
- Manuscript Revised: 21 OCT 2008
- Manuscript Received: 22 JUL 2008
Funded by
- National Natural Science Foundation of China. Grant Numbers: 20476046, 20771059
- “Qinglan” Project of Jiangsu Province for Young Researchers
Keywords:
- biphasic catalysis;
- heterogeneous catalysis;
- homogeneous catalysis;
- ionic liquids;
- phase-transfer catalysis
Graphical Abstract
It comes out in the wash: In the esterification of citric acid with n-butanol, heteropolyanion-based ionic liquid (IL) catalysts show high catalytic activity, self-separation, and easy reuse. The good solubility in reactants, nonmiscibility with ester product, and high melting point of the IL catalysts enable the reaction-induced switching from homogeneous (b in the picture) to heterogeneous (c) with subsequent precipitation of the catalyst (d).