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通过紫外光谱研究了EMIMBF4、BMIMBF4、BMIMHSO4和BMIMAc四种咪唑型离子液体(ILs)与4-甲氧基甲苯(p-MT)之间的相互作用,采用循环伏安法(CV)和计时电流法(CP)研究了p-MT在四种离子液体中的电化学氧化行为,探讨了咪唑型离子液体对反应的影响.实验结果表明,在离子液体水溶液中p-MT的紫外光谱出现明显的红移,其溶剂分子和反应底物p-MT之间相互作用,这有利于p-MT产生相对稳定的激发态.p-MT在离子液体水溶液中的电氧化受扩散控制,且p-MT在EMIMBF4水溶液中的扩散系数和电解产物的产率和选择性最佳.
The interaction between four imidazolium ionic liquids (ILs) and 4-methoxytoluene (p-MT) of EMIMBF4, BMIMBF4, BMIMHSO4 and BMIMAc was studied by UV spectroscopy. Cyclic voltammetry (CV) and chronoamperometry (CP) was used to study the electrochemical oxidation behavior of p-MT in four ionic liquids and the influence of imidazole ionic liquids on the reaction was also investigated.The experimental results showed that the UV spectra of p-MT in aqueous ionic liquids showed obvious Red-shift, the solvent molecule and the reaction substrate p-MT interaction, which is conducive to p-MT produce a relatively stable excited state.p-MT in the ionic liquid aqueous solution of electro-oxidation controlled by diffusion, and p-MT The diffusion coefficient and the yield and selectivity of the electrolytes in EMIMBF4 aqueous solution are the best.