Search results for: HALIDE QUENCHING

• Photophysics and Halide Quenching of Soret-excited ZnTPPS4- in Aqueous Media

  Publication

  • J. Szmytkowski
  • S. M. Brunet
  • U. Tripathy
  • J. A. O'Brien
  • M. F. Paige
  • R. P. Steer

  - CHEMICAL PHYSICS LETTERS - Year 2011

  Steady state S2-S0 and S1-S0 absorption and emission spectra and picosecond S2 decay and S1 fluorescence rise times have been measured for the model porphyrin ZnTPPS4− in water and in aqueous iodide solutions of constant ionic strength. The dynamics of S1 quenching by iodide are well-modeled by a Stern-Volmer mechanism yielding kQ = 1.75 × 109 M−1 s−1. The S2 state is quenched on a ps time scale by a static electron-transfer mechanism...

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