PHOTOPHYSICS AND PHOTOCHEMISTRY OF TETRAANTHRAPORPHYRAZINES - ATTEMPTS TO OBTAIN A NEW-GENERATION OF PHOTOSENSITIZERS

被引:20
作者
FREYER, W
STIEL, H
TEUCHNER, K
LEUPOLD, D
机构
[1] Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, W-12489 Berlin
关键词
D O I
10.1016/1010-6030(94)01051-X
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Linearly benzo-annulated copper porphyrazines, such as octaphenyltetraanthraporphyrazinato-copper and octapentoxytetranaphthoporphyrazinato-copper, with absorption maxima at about 880 nm, were synthesized. These compounds exhibit very low-lying triplets with an energy below the activation energy of singlet oxygen. Therefore they do not generate singlet oxygen. The transient absorption spectra of the T(l)-T(x) transition were measured. The solvent dependence of the photophysical parameters in the triplet manifold is discussed. On irradiation in the presence of CBr4, pi-Cation radicals are formed.
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页码:161 / 167
页数:7
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