新型对称烷基咪唑醋酸盐离子液体的合成及其理化性质研究

Preparation and Physico-chemical Properties of Symmetrical 1,3-Dialkylimidazolium Acetate Ionic Liquid

设计合成了4种标题化合物,产物结构经IR、ESI-MS和1HNMR确认。测定了其密度、热稳定性、粘度、极性、表面张力等理化性质。结果表明,阳离子咪唑环1、3位氮上烷基碳链长短与同分异构之间的构型差异都会明显影响离子液体的性质。

Four novel symmetrical 1,3-dialkylimidazolium acetate ionic liquids were designed and synthesized. The structures were confirmed by IR,ESI-MS and1 HNMR. The physicochemical properties including density,thermal stability,polarity,viscosity and surface tension were determined. The results showed that the alkyl chain length at the 1-and 3-position of nitrogen of the imidazole cation,as well as the spatial configuration of isomers,would significantly affect the properties of ionic liquids.