Excited State Dynamics of meso-Tetra(sulphonatophenyl) Metalloporphyrins

The excited state dynamics of Zn2+, Fe3+, and Mn3+ meso-tetra(sulfonatophenyl) porphyrin complexes were investigated with a Z-scan technique at 532 nm using 70 ps and 120 fs single pulses and 200 ns pulse trains of a Q-switched and mode locked laser. We determined the characteristic interconversion...

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Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2008-07, Vol.112 (29), p.6522-6526
Main Authors: Gonçalves, P. J, De Boni, L, Borissevitch, I. E, Zílio, S. C
Format: Article
Language:English
Subjects:
A: Dynamics, Clusters, Excited States
Fluorescence
Metalloporphyrins - chemistry
Quantum Theory
Spectrophotometry, Ultraviolet
Time Factors
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Summary:The excited state dynamics of Zn2+, Fe3+, and Mn3+ meso-tetra(sulfonatophenyl) porphyrin complexes were investigated with a Z-scan technique at 532 nm using 70 ps and 120 fs single pulses and 200 ns pulse trains of a Q-switched and mode locked laser. We determined the characteristic interconversion and intersystem crossing times, quantum yields of the excited S1 state, and S1 → S n and T1 → T n transition cross-sections. The ground state cross-sections were obtained using UV−vis absorption spectroscopy, and a five-energy-level diagram was used to yield the photophysical parameters mentioned previously.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp800589j