Picosecond Kinetics and Reverse Saturable Absorption of Meso-Substituted Tetrabenzoporphyrins

The mechanism of reverse saturable absorption of meso-substituted tetrabenzoporphyrins was studied by means of picosecond transient spectroscopy. Characteristic 1(π,π*), 3(π,π*), and (d,d) transitions have been observed. The kinetics of the excited states vary with metal substitution. The nonlinear...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1996-10, Vol.100 (44), p.17507-17512
Main Authors: Chen, Peilin, Tomov, Ivan V, Dvornikov, Alexander S, Nakashima, Masato, Roach, Joseph F, Alabran, David M, Rentzepis, Peter M
Format: Article
Language:English
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Summary:The mechanism of reverse saturable absorption of meso-substituted tetrabenzoporphyrins was studied by means of picosecond transient spectroscopy. Characteristic 1(π,π*), 3(π,π*), and (d,d) transitions have been observed. The kinetics of the excited states vary with metal substitution. The nonlinear transmission of benzoporphyrins was measured, and the excited-state absorption was determined to be the dominant optical limiting mechanism. The results agreed very well with a five-level model.
ISSN:0022-3654
1541-5740
DOI:10.1021/jp9615161