Li, T., Zhang, W., Chen, W., Miras, H. N. and Song, Y.-F. (2018) Layered double hydroxide anchored ionic liquids as amphiphilic heterogeneous catalysts for the Knoevenagel condensation reaction. Dalton Transactions, 47(9), pp. 3059-3067. (doi: 10.1039/c7dt03665e) (PMID:29184948)
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Abstract
In recent years, great attention has been dedicated to the development of heterogeneous base catalysts providing a green and sustainable process in benign aqueous media. Herein, the ionic liquid modified layered double hydroxide (LDH) based catalysts of LDH-IL-Cn (n = 4, 8, 12) were prepared by adopting an exfoliation/assembly strategy, in which the ionic liquids (ILs) were covalently anchored onto the surface of LDH layers. The resulting LDH-IL-Cn were characterized by FT-IR, solid-state 13C NMR, 29Si CP/MAS NMR, 27Al-MAS NMR, XRD, TG-DTA, BET, XPS, SEM, CO2-TPD, contact angle experiments, etc. The catalytic performance of LDH-IL-C12 for the Knoevenagel condensation of a variety of aldehydes with ethyl cyanoacetate/malononitrile in H2O at room temperature showed excellent yields and selectivities. Moreover, the base catalyst of LDH-IL-C12 can be easily recycled and reused for at least 5 times without the decrease of its catalytic efficiency. The scaled-up experiments revealed that the catalyst retained its efficiency and robustness.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Moiras, Professor Haralampos |
Authors: | Li, T., Zhang, W., Chen, W., Miras, H. N., and Song, Y.-F. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Dalton Transactions |
Publisher: | Royal Society of Chemistry (RSC) |
ISSN: | 1477-9226 |
ISSN (Online): | 1477-9234 |
Published Online: | 15 November 2017 |
Copyright Holders: | Copyright © 2017 The Royal Society of Chemistry |
First Published: | First published in Dalton Transactions 47(9):3059-3067 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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