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Picosecond fluorescence study of the lifetimes of metalloporphyrin S1 and S2 states

✍ Scribed by J. Aaviksoo; A. Freiberg; S. Savikhin; G.F. Stelmakh; M.P. Tsvirko

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 381 KB
Volume: 111
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)85505-0

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✦ Synopsis

The picosecond fluorimetry technique is used to determine directly the short lifetimes of metatloporphyrin (rr. rr*) states. The Sr + Se and Sa + Se fluorescence of Cd and Lu tetrabenzoporphyrins is studied. For completeness, Zn tetrabenzoporphyrin fluorescence is dealt with using more traditional techniques. It is concluded that, contrary to the S r (x, n*) state deactivation, intersystcm crossing is unimportant in deactivation of the upper excited (x. n*) states of closedshell metalloporphyrins.

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This study was funded by Spanish MEC under the programs CTQ2009-06968 and Consolider SAUUL CSD2007-00013. The experiments were carried out at the SGIker laser facility of the UPV/ EHU.