Excimer formation in triplet-triplet annihilation reactions of metal (3ππ*) porphyrins and (3ππ*) phthalocyanines
✍ Scribed by Mark E. Frink; G. Ferraudi
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 269 KB
- Volume
- 124
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The triplet-triplet annihilation of the lowest-lying excited states of porphyrins and phthalocyanines has been investigated by laser flash photolysis. Spectroscopic and kinetic evtdence indicates that the lowest-lying triplet dimerizes into excimers at a rate less than diffusion controlled.
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A computational result is presented for naphthdene which suggests that the conformation of the triplet evcimer is significantly different from a sandwich-pair geometry favored by the singlet excimer. A major consequence of the non-sandwich-pair geometry of the triplet excimer is a breakdown of the o
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