Department of Chemistry, Indian Institute of Technology, Patna 800013, Bihar (India).
Chemphyschem. 2013 Oct 7;14(14):3400-9. doi: 10.1002/cphc.201300433. Epub 2013 Aug 9.
The ultrafast excited-state dynamics of a fibril binding dye, thioflavin T (ThT), has been studied in two room-temperature ionic liquids (RTILs): 1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and methyltrioctylammonium bis(trifluoromethylsulfonyl)imide. Previously, in most studies, it was observed that the excited-state dynamics of the ThT dye were dependent on the viscosity of the medium. In our study, by using RTILs, we have demonstrated that the excited-state dynamics of ThT are not only viscosity dependent, but also dependent on the heterogeneous nature of the medium. The effect of structural heterogeneity present in neat RTILs on the excited-state dynamics of ThT was observed. For both RTILs, excitation wavelength dependency on the emission properties of ThT was observed.
纤维结合染料硫黄素 T（ThT）的超快激发态动力学已在两种室温离子液体（RTILs）中进行了研究：1-丁基-1-甲基吡咯烷双（三氟甲基磺酰基）亚胺和甲基三辛基氯化铵双（三氟甲基磺酰基）亚胺。以前，在大多数研究中，观察到 ThT 染料的激发态动力学取决于介质的粘度。在我们的研究中，通过使用 RTILs，我们证明了 ThT 的激发态动力学不仅取决于粘度，还取决于介质的非均相性质。观察到在纯 RTILs 中存在的结构非均质性对 ThT 的激发态动力学的影响。对于这两种 RTILs，都观察到了激发波长对 ThT 发射特性的依赖性。
