Torsional dynamics of thioflavin T in room-temperature ionic liquids: an effect of heterogeneity of the medium.
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.
['Chatterjee|Aninda|A|', 'Maity|Banibrata|B|', 'Seth|Debabrata|D|']
D052160:Benzothiazoles D005456:Fluorescent Dyes D007094:Imides D052578:Ionic Liquids D011759:Pyrrolidines D000644:Quaternary Ammonium Compounds D013050:Spectrometry, Fluorescence D013056:Spectrophotometry, Ultraviolet D013696:Temperature D013844:Thiazoles D014783:Viscosity
ionic liquids computational chemistry dyes/pigments photophysics structure–activity relationships