Imidazolium chloride immobilized fly ash as a heterogenized organocatalyst for esterification reaction under microwave irradiation heating

Document Type: Research Article

Authors

1 DEPARTMENT OF PURE & APPLIED CHEMISTRY, UNIVERSITY OF KOTA, KOTA

2 Department of Pure and Applied Chemistry, University of Kota, Kota, 324005, Rajasthan, India

Abstract

An efficient solventless one-pot procedure for the synthesis of imidazolium based ionic liquid under microwave irradiation is described in which 1-methylimidazole was modified by organosilane (3-chloropropyl triethoxysilane). This ionic liquid1-methyl-3-[(triethoxysilyl)propyl]imidazolium chloride (TMICl) is immobilized on mechanically activated fly ash (MFA) by co-condensation method to develop an active organocatalyst (TMICl/MFA). The mechanical activation has generated significant number of silanol groups suitable for immobilizing ionic liquids. For characterization of various materials, different techniques viz, XRD, FTIR, SEM-EDX, TGA, BET surface area, H1NMR are used. The prepared TMICl/MFA exhibited high catalytic activity for a series of microwave assisted esterification of aliphatic alcohols and salicylic acid for four successive reaction cycles under optimized conditions.

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