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.
Department of Chemistry, Indian Institute of Technology, Patna 800013, Bihar (India).
Aninda
A
Chatterjee
Banibrata
B
Maity
Debabrata
D
Seth
D052160:Benzothiazoles; D005456:Fluorescent Dyes / Q000737:chemistry; D007094:Imides / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D011759:Pyrrolidines / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D013844:Thiazoles / Q000737:chemistry*; D014783:Viscosity
C581933:1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide; D052160:Benzothiazoles; D005456:Fluorescent Dyes; D007094:Imides; D052578:Ionic Liquids; D011759:Pyrrolidines; D000644:Quaternary Ammonium Compounds; D013844:Thiazoles; C009462:thioflavin T; C037759:trioctylmethylammonium
computational chemistry; dyes/pigments; ionic liquids; photophysics; structure–activity relationships