双盐离子液体的离子微环境调控及对环氧丙烷开环反应的影响  

The Ionic Microenvironment Regulation of Double Salt Ionic Liquids and Its Effect on the Ring-Opening Reaction of Propylene Oxide

作　　者：陈圣新 黄昭晖 陈平 李鑫钢[1] CHEN Shengxin;HUANG Zhaohui;CHEN Ping;LI Xin′gang(College of Chemical Engineering and Technology,Tianjin University,National Engineering Research Center of Distillation Technology,Tianjin 300072,China;Fine Chemicals Room,Sinopec Ningbo Institute of New Materials,Ningbo 315200,China)

机构地区：[1]天津大学化学工程与技术学院,精馏技术国家工程研究中心,天津300072 [2]中石化宁波新材料研究院精细化工室,浙江宁波315200

出　　处：《河南化工》2024年第11期19-24,共6页Henan Chemical Industry

摘　　要：合成了具有不同阳离子1-乙基-3-甲基咪唑、胆碱、四乙基铵,但具有相同阴离子醋酸根的双盐离子液体(DSILs)。随着不同阳离子混合和比例的调整,DSILs的氢键离子微环境和电子密度通过递减密度梯度和核磁共振光谱进行分析,揭示了其非理想型变化的原因。当DSILs催化剂被放入甲醇溶剂中时,离子液体之间的相互作用被屏蔽,进一步对甲醇的溶剂性能造成影响。在环氧丙烷与甲醇的开环加成反应中,DSILs催化剂通过不同阳离子组合和比例的调整,增强了单一离子液体的催化性能。Double salt ionic liquids(DSILs)with different cations 1-ethyl-3-methylimidazole,choline and tetraethylammonium but the same anion acetate are synthesized.With the mixing and proportion adjustment of different cations,the hydrogen bond ion microenvironment and electron density of DSILs are analyzed by decreasing density gradient and nuclear magnetic resonance spectroscopy,revealing the reasons for the non-ideal changes.When the DSILs catalyst is put into the methanol solvent,the interaction between the ionic liquids is shielded,which further affects the solvent performance of methanol.In the ring-opening addition reaction of propylene oxide and methanol,the DSILs catalyst enhances the catalytic performance of the single ionic liquid by adjusting the combination and proportion of different cations.

关 键 词：双盐离子液体 离子微环境 环氧化物开环反应 催化 

分 类 号：TQ203.9[化学工程—有机化工]