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Singlet—singlet intramolecular energy and electron transfer in covalently-linked porphyrin—phthalocyanine heterodimers

✍ Scribed by Hong-Jian Tian; Qing-Fu Zhou; Shu-Yin Shen; Hui-Jun Xu

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
424 KB
Volume
72
Category
Article
ISSN
1010-6030

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✦ Synopsis

Intramolecular transfer processes in porphyrin-phthalocyanine heterodimers covalently linked by an oxygen atom (restricted conformation) and/or by a flexible chain of variable length were investigated. Fluorescence spectroscopy shows that singlet-singlet energy transfer from the porphyrin to the phthalocyanine moiety occurs. From fluorescence decay studies, it is concluded that the heterodimers exist in solution in different non-equilibrating conformations. The effects of the chain length and mutual orientation of the chromophore subunits in the heterodimers on the intramolecular energy and electron transfer efficiencies are discussed.

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Solvent effects on competitive intramole
Solvent effects on competitive intramolecular electron transfer and energy transfer in a covalently linked porphyrin-phthalocyanine heterodimer
✍ Tian Hong-Jian; Zhou Qing-Pu; Shen Shu-Yin; Xu Hui-Jun 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 418 KB

## Abstract Photophysical properties of a porphyrin‐phthalocyanine heterodimer covalently linked with a dipentoxy chain have been studied. Absorption spectra show that there is weak exciton coupling between the two chromophores in the ground state. Fluorescence spectra show that intramolecular ener