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Laser Flash Photolysis of Phthalocyanines in Solution and Microemulsion

✍ Scribed by Patrice Jacques; André M. Braun

Publisher
John Wiley and Sons
Year
1981
Tongue
German
Weight
378 KB
Volume
64
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Triplet state formation (Φ~isc~) and properties (ε~T‐T~, τ~T~) of phthalocyanine (HPC) and zinc phthalocyanine (ZnPC) have been characterized in homogeneous solutions (1‐chloronaphthalene, 1‐propanol) and in microemulsion by investigating the variation of the transient optical density as a function of the intensity of the exciting laser. Experimental results follow the theoretically predicted dependence only for very low intensities of the exciting pulse. At higher intensities, a more complicated scheme of primary reactions has to be taken into account, implicating qualitative restrictions in the application of saturation experiments. The observed transients at high‐intensity excitation are interpreted as being perturbed by aggregational phenomena.

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