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Molecules 2014, 19(7), 8840-8884; doi:10.3390/molecules19078840

The Use of Supported Acidic Ionic Liquids in Organic Synthesis

University of Pannonia, Institute of Chemistry, Department of Organic Chemistry, P. O. Box 158, Veszprém H-8201, Hungary
Received: 30 April 2014 / Revised: 30 May 2014 / Accepted: 16 June 2014 / Published: 26 June 2014
(This article belongs to the Special Issue Heterogeneous Acid Catalysts)

Abstract

Catalysts obtained by the immobilisation of acidic ionic liquids (ILs) on solid supports offer several advantages compared to the use of catalytically active ILs themselves. Immobilisation may result in an increase in the number of accessible active sites of the catalyst and a reduction of the amount of the IL required. The ionic liquid films on the carrier surfaces provide a homogeneous environment for catalytic reactions but the catalyst appears macroscopically as a dry solid, so it can simply be separated from the reaction mixture. As another advantage, it can easily be applied in a continuous fixed bed reactor. In the present review the main synthetic strategies towards the preparation of supported Lewis acidic and Brønsted acidic ILs are summarised. The most important characterisation methods and structural features of the supported ionic liquids are presented. Their efficiency in catalytic reactions is discussed with special emphasis on their recyclability. View Full-Text
Keywords: ionic liquid; Lewis acidity; Brønsted acidity; supported; impregnation; grafting; sol-gel; acidic catalyst; recycling ionic liquid; Lewis acidity; Brønsted acidity; supported; impregnation; grafting; sol-gel; acidic catalyst; recycling
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Skoda-Földes, R. The Use of Supported Acidic Ionic Liquids in Organic Synthesis. Molecules 2014, 19, 8840-8884.

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