CARBOXYLATED ZINC PHTHALOCYANINES .3. QUENCHING OF EXCITED SINGLET AND TRIPLET-STATES BY QUINONES IN CTAC MICELLES

Authors
DARAIO ME ARAMENDIA PF SANROMAN E
Citation
Me. Daraio et al., CARBOXYLATED ZINC PHTHALOCYANINES .3. QUENCHING OF EXCITED SINGLET AND TRIPLET-STATES BY QUINONES IN CTAC MICELLES, Journal of photochemistry and photobiology. A, Chemistry, 77(1), 1994, pp. 41-48
Citations number
38
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
77
Issue
1
Year of publication
1994
Pages
41 - 48
Database
ISI
SICI code
1010-6030(1994)77:1<41:CZP.QO>2.0.ZU;2-K
Abstract
Deactivation of zinc dicarboxydiamide phthalocyanine (ZnPc) by quinone s was investigated in hexadecyltrimethylammonium chloride micelles by fluorescence and triplet quenching experiments. Fluorescence data were handled according to the method of Encinas and Lissi (Chem. Phys. Let t., 91 (1982) 55) to derive quencher partition constants. The same dat a were used to obtain singlet quenching constants. Triplet quenching a nd quencher exit rate constants were obtained by steady state singlet oxygen phosphorescence detection. The correlation of the quenching rat e constants with the redox potentials indicates electron transfer quen ching.