Preparation and Catalytic Performance of Gold Nanoparticles Stabilized by Thioether-Functionalized Ionic Liquid

Abstract

Abstract: A novel thioether-functionalized ionic liquid (TFIL) was synthesized and applied as a stabilizer for the preparation of gold nanoparticles (GNP) in the ionic liquid of 1-n-butyl-3-methylimidazolium hexafluorophosphate. GNP stabilized by TFIL (GNP-TFIL) were characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and transmission electron microscopy. GNP-TFIL remained the structure of TFIL after GNP was stabilized by TFIL. GNP-TFIL displayed an interface resonance absorption appearing around 526 nm, which suggests the formation of GNP. GNP stabilized by TFIL could be dispersed uniformly with the particle size of2.0-3.6nm. GNP exhibited high catalytic activity in the epoxidation of styrene and could be reused. The conversion of styrene and the selectivity for styrene oxide were as high as 100% and 88.5%, respectively, when the reaction was performed at 45 ℃ for6 husing 3-chloroperoxybenzoic acid as the oxidant.

Key words: thioether-functionalized ionic liquid, gold nanoparticle, styrene, epoxidation, styrene oxide

LI Biaomo;YU Ningya*;WANG Pingjun;JIN Yong;YIN Donghong;*. Preparation and Catalytic Performance of Gold Nanoparticles Stabilized by Thioether-Functionalized Ionic Liquid[J]. Chinese Journal of Catalysis, 2007, 28(10): 875-879.

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Preparation and Catalytic Performance of Gold Nanoparticles Stabilized by Thioether-Functionalized Ionic Liquid

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