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The effect of mutual orientation on the triplet state magnetization of covalently linked hybrid porphyrin dimers

✍ Scribed by A. Regev; T. Galili; H. Levanon; A. Harriman

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 629 KB
Volume: 131
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80532-2

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✦ Synopsis

We report laser excitation-time-resolved EPR spectroscopy on the transient triplet magnetization of covalently Iinked hybrid porphyrin dimers, Zn(-CHz-JnHz, oriented in a uni-axial liquid crystal at 100 K. Three dimers are investigated: for n = 3, the para-para and ortho-ortho, and for n = 6, the ortho-ortho.

Selective singlet excitation of the dlmer components reveals intramolecular singlet energy transfer rates, k,, = 1.5 X log s-t for both the ortho-ortho compounds, and 4.7 x lOa s-l for the para-para compound.

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