金属配位(螯合)型离子液体在二氧化碳吸收和转化中的研究进展  

The research progress on CO_(2) absorption and conversion by metal coordination-based(chelate-based) ionic liquids

作　　者：许映杰[1] 舒荷刚 刘佳佳 付雪 Yingjie Xu;Hegang Shu;Jiajia Liu;Xue Fu(College of Chemistry and Chemical Engineering,Shaoxing University,Shaoxing 312000,China)

机构地区：[1]绍兴文理学院化学化工学院,绍兴312000

出　　处：《科学通报》2021年第7期728-738,共11页Chinese Science Bulletin

基　　金：国家自然科学基金(21978172);浙江省自然科学基金(Y18B060014,LY14B060002)资助。

摘　　要：金属配位型离子液体(ionic liquids, ILs)是一类由金属离子与有机或无机配体通过配位作用形成的低温熔盐.其中,当金属离子与配体具有多齿配位点时,将其称为金属螯合型ILs.目前,金属配位(螯合)型ILs已经被广泛用于气体吸收和有机催化等领域,显示出了优异的性能.本文首先对近年来金属阴离子配位型ILs和金属阳离子螯合型ILs在二氧化碳(CO_(2))吸收中的应用进行综述,重点讨论了金属离子、配体和阴离子种类对CO_(2)吸收性能的影响;其次,总结了金属阴离子配位型ILs、金属阳离子配位型ILs、金属阴阳离子配位型ILs和金属阳离子螯合型ILs催化CO_(2)化学转化的研究进展,分析比较了不同类型金属配位(螯合)型ILs催化CO_(2)与环氧、末端炔烃、炔丙醇等底物的反应性能与机理;最后,阐述了金属配位(螯合)型ILs应用于CO_(2)吸收与化学转化时存在的问题与面临的挑战与机遇.Metal coordination-based ionic liquids(ILs) are a type of low-temperature molten salts formed by the coordination of metal ions and organic or inorganic ligands. Among them, when the metal ion and the ligand have a multidentate coordination site, it is called metal chelate-based ILs. At present, metal coordination-based(chelate-based) ILs have been widely used in gas absorption and organic catalysis, showing excellent performance. In this paper, the research progresses on CO2 absorption and conversion by metal coordination-based(chelate-based) ILs in recent years have been reviewed, focusing on the effects of metal ions and ligand types on CO_(2) absorption and chemical conversion performance. Generally, the metal anion-coordination-based ILs absorb CO2 through physical interaction, while the metal cation-chelate-based ILs with alcohol amine or amine ligand can react with CO_(2) through chemical interaction. Therefore, the CO_(2) absorption capacity of the former is lower than that of the latter. The stronger the chelation interaction between the central metal ion and the ligand, the greater the CO_(2) absorption capacity of the metal cation-chelate-based ILs. The chelation interaction between the ligand and the central metal ion can be adjusted by changing the type of the central metal ion and the number of ligand coordination atoms. Increasing the central metal ion empty orbital and the number of ligand coordination atoms will enhance the chelation interaction of the metal cation-chelate-based ILs. In addition, the introduction of functionalized anion groups such as [Im]-, [Pyr]-, [Pro]-, [PhO]-, etc. is beneficial to improve the carbon capture ability of the metal cation-chelate-based ILs. In this way, the anion and cation of the metal cation-chelate-based ILs can react with CO_(2),thereby increasing the CO_(2) absorption capacity. Although the high viscosity of the metal cation-chelate-based ILs will affect its absorption performance, the mixed system obtained by mixing the metal cation-chelate-based ILs with

关 键 词：离子液体 金属配位型离子液体 金属螯合型离子液体 二氧化碳 吸收 转化 

分 类 号：TQ028.17[化学工程] X701[环境科学与工程—环境工程] O641.4[理学—物理化学]