四苯硼二烷基咪唑盐离子液体的合成及其电导性能

近十几年来，离子液体由于其显著的化学、物理特性以及作为一种环境友好的高效催化剂、良好的有机反应溶剂以及在分离及电化学等方面的应用，成为国内外学者研究的热点．在已报道的离子液体的组成中，阳离子主要是含有取代基团的咪唑、吡啶、喹啉、异喹啉等含氮有机杂环，

Synthesis and electrical conductivity of dialkylimidazolium tetraphenylborate

Owing to their unique chemical and physical properties, ionic liquids have caught attention for applications in diverse areas ranging from synthetic and catalytic chemistry to biotechnology, electrochemistry and material science. For fully using it in reaction, understanding of the physical and chemical properties of the ionic liquids is very important.The ionic liquid 1-butyl-3-methyl imidazolium tetraphenylborate (［BMIm］［BPh₄］) was synthesized in this study.Its structure and stability were determined by 1H NMR，UV and DSC. The melting point，solubilities and conductivities in different solvents and under different conditions were studied as well.The results showed that 1-butyl-3-methyl imidazolium tetraphenylborate was stable and was characterized as a strong electrolyte. The limiting molar conductivity values of the compound in acetone,acetonitrile,DMF, ethanol and ethyl acetate were 157.53, 171.38, 58.87, 42.04 and 15.02 S•cm²•mol^-1, respectively.［BMIm］［BPh₄］ had definite catalytic activity in the synthesis of isopentyl acetate.