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Abstract
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 at an average donor-acceptor separation of 0.38 nm. The implications of these data for dye-sensitized solar cells that employ I−/I3− as the redox medium are discussed.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
CHEMICAL PHYSICS LETTERS
no. 501,
pages 278 - 282,
ISSN: 0009-2614 - Language:
- English
- Publication year:
- 2011
- Bibliographic description:
- Szmytkowski J., Brunet S., Tripathy U., O'brien J., Paige M., Steer R.: Photophysics and Halide Quenching of Soret-excited ZnTPPS4- in Aqueous Media// CHEMICAL PHYSICS LETTERS. -Vol. 501, nr. Iss. 4-6 (2011), s.278-282
- Verified by:
- Gdańsk University of Technology
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