Influence of imidazolium ionic liquids on fluorescence of push-pull diphenylbutadienes
作者:Anuji K. Vasu、Jagadish Katla、Naved I. Malek、Sriram Kanvah
DOI:10.1016/j.jphotochem.2016.01.015
日期:2016.5
in ethanol. Excitation dependent emission studies of fluorophores in ionic liquids show distinct emission signals due to the locally excited and the charge transfer states revealing the existence of two species. Time resolved experiments show single exponential decay in organic solvents and bi-exponential decay in ionic liquids media,an indication of interaction of fluorophores with different microenvironments
已经合成了一系列供体-受体取代的二苯基丁二烯,并研究了它们在有机溶剂和咪唑鎓离子液体介质中的荧光性质。取代的二苯丁二烯由于分子内电荷转移,在极性溶剂和离子液体中显示出显着的溶剂变色发光。有趣的是,含有甲氧基供体和硝基受体的二苯基丁二烯在乙醇中表现出激发依赖性的发射行为。离子液体中荧光团的激发依赖性发射研究表明,由于局部激发,电荷转移状态揭示了两种物质的存在,从而产生了不同的发射信号。时间分辨实验表明,有机溶剂中的单指数衰减和离子液体介质中的双指数衰减,