Charge transfer process determines ultrafast excited state deactivation of thioflavin T in low-viscosity solvents.

作者: Vitali I. Stsiapura , Alexander A. Maskevich , Sergey A. Tikhomirov , Oleg V. Buganov

DOI: 10.1021/JP105186Z

关键词:

摘要: Here we provide first direct experimental results about photoinduced TICT-state formation for Thioflavin T (ThT). In this work, femtosecond transient absorption spectra dynamics ThT, dissolved in low-viscosity solvents (water, ethanol, 2-propanol, butanol) was investigated. It found that decay lifetime of fluorescent LE-state ThT low-viscous does not exceed 12 ps, and its value correlates well with rising time the band at 470 nm. indicates initially formed upon photoexcitation is quite rapidly converted to a state characterized by We associate emerging intermediate nonfluorescent dye. Rate LE → TICT process significantly depends on viscosity comparable rate solvent relaxation resulting time-dependent Stokes shift stimulated emission band. deactivation be also dependent changed from 3.8 ± 0.1 ps (in H...

参考文章(1)
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