Chloro benzoate cyanine picolinium photoacid excited-state proton transfer to water

Ori Green, Oren Gajst, Ron Simkovitch, Doron Shabat, Dan Huppert

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)230-237
Number of pages8
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume349
DOIs
StatePublished - 1 Dec 2017

Keywords

  • Excited-state proton transfer
  • Kinetic isotope effect
  • Nonradiative rate
  • Photoacid
  • Time-resolved fluorescence

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