Yield of intersystem (singlet-triplet) crossing in phthalocyanines evaluated on the basis of a time in resolved photothermal method

Authors
Frackowiak, D Planner, A Waszkowiak, A Boguta, A Ion, RM Wiktorowicz, K
Citation
D. Frackowiak et al., Yield of intersystem (singlet-triplet) crossing in phthalocyanines evaluated on the basis of a time in resolved photothermal method, J PHOTOCH A, 141(2-3), 2001, pp. 101-108
Citations number
33
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN journal
10106030 → ACNP
Volume
141
Issue
2-3
Year of publication
2001
Pages
101 - 108
Database
ISI
SICI code
1010-6030(20010702)141:2-3<101:YOI(CI>2.0.ZU;2-G
Abstract
The yields of triplet state formation for seven various phthalocyanines (Pc ) unsubstituted by metal and substituted by Mg, Zn, Cu and Al in dimethyl-s ulfoxide (DMSO) solutions were compared on the basis of time resolved photo thermal measurements. The sample with atmospheric oxygen and bubbled by nit rogen were investigated. Absorption, fluorescence, and steady state photoac oustic spectra (PAS) of the same samples were also measured. The yields of triplet state formation for most of metal substituted dyes were higher than for investigated metal-free dyes. The triplets for various dyes were diffe rently quenched by oxygen. The possibility of the application of investigat ed dyes in photodynamic therapy and diagnosis was discussed. (C) 2001 Elsev ier Science B.V. All rights reserved.