Steady-state and time-resolved fluorescence techniques were employed to study the photoacidity of a newly synthesized photoacid, the chloro benzoate cyanine picolinium salt. It was found that the ESPT rate constant is ultrafast in water (kPT = 6.2 × 1012s−1). We also found that the kinetic isotope effect is ∼1.7. The deprotonated form of the photoacid has a short lifetime of about 95 ps.
|Number of pages||8|
|Journal||Journal of Photochemistry and Photobiology A: Chemistry|
|State||Published - 1 Dec 2017|
- Excited-state proton transfer
- Kinetic isotope effect
- Nonradiative rate
- Time-resolved fluorescence