摘要
合成了氨基功能化乙烯基咪唑离子液体(AIL),利用氨基固定金纳米粒子以及双键的聚合作用,获得了聚离子液体固载金纳米粒子的催化剂(GNPs-P-AIL).采用红外光谱、紫外-可见光谱和透射电子显微镜等方法对GNPs-P-AIL进行了表征.结果表明,AIL在固定金纳米粒子并聚合后仍然保持着离子液体的基本结构,金纳米粒子分布均匀,粒径为6～8 nm.GNPs-P-AIL催化剂对苯乙烯环氧化具有较好的催化活性,以双氧水为氧化剂,在60℃下反应6 h时,苯乙烯的转化率和环氧苯乙烷的选择性分别可达81.5%和88.3%.
An amino-functionalized ionic liquid of N-（3-aminopropyl）,N（3）-（vinyl）-imidazolium bromide（AIL） was synthesized and used to stabilize gold nanoparticles（GNPs）.Further polymerization of the resultant GNP-containing AIL led to a composite catalyst（GNPs-P-AIL） in which GNPs were supported by ionic copolymer.The composite catalyst was characterized by means of Fourier transform infrared spectroscopy,ultraviolet-visible spectroscopy,and transmission electron microscopy.It was found that the structure of ionic liquid moieties in GNPs-P-AIL remained intact after the GNP loading and successive polymerization processes and that the GNPs in the composite catalyst dispersed uniformly with the particle size of 6～8 nm.GNPs-P-AIL showed good catalytic performance in the epoxidation of styrene using H2O2 as the oxidant.The conversion of styrene and the selectivity for styrene oxide were as high as 81.5% and 88.3%,respectively,provided that the epoxidation reaction was performed at 60 ℃ for 6 h.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2010年第6期510-515,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(20803021)
关键词
氨基功能化离子液体
金纳米粒子
聚合
苯乙烯
环氧化
Amino-functionalized ionic liquid
Gold nanoparticles
Polymerization
Styrene
Epoxidation
