单模聚焦微波辅助合成1-乙基-3-羧甲基咪唑四氟硼酸盐离子液体

以1-乙基咪唑为原料,采用discover环形单模聚焦微波合成仪合成了1-乙基-3-羧甲基咪唑四氟硼酸盐离子液体,对产品结构进行了表征及热性分析,并测定了粘度、密度、表面张力、电化学窗口等物化性能,同时考察了合成离子液体对淀粉的溶解性能.结果表明,单模聚焦微波辐射合成具有速度快、时间短、反应条件温和等优点,产品产率为88.23％,其密度、粘度、表面张力与温度均呈线性关系,且随温度升高而减小.与水溶剂相比,合成的离子液体对可溶性淀粉具有较高的溶解度,为淀粉及其衍生物的均相衍生化反应提供了理论基础.

Microwave-assisted Synthesis of 1-Ethyl-3-carboxymethylimidazolium Tetra-fluoroborate Ionic Liquid by Focused Signal-mode Microwave Irradiation

The ionic liquid,1-ethyl-3-carboxymethylimidazolium tetrafluoroborate was synthesized with 1-ethylimidazole based on the single-mode microwave synthesizer.The structure of the product was characterized,and underwent a thermal analysis.Its properties such as viscosity,density,surface tension and electrochemical window were also measured.Meanwhile,the solubility of starch in ionic liquid was investigated.The results showed that the microwave irradiation has the advantages of fastness,short reaction time and mild reaction condition.The yield of the product is 88.23％.Its properties of density,viscosity and surface tension have linear relationships with temperature,respectively.Compared with water,the ionic liquid has a higher solubility for starch soluble,which provides a theoretical basis for the homogeneous derivatization reaction of starch and its derivatives.