Triplet porphyrins as donors in intramolecular electron transfer and their intermolecular interaction with free radicals

Autor:	Aharon Blank, Haim Levanon, Tamar Galili
Rok vydání:	2001
Předmět:	Stereochemistry Intermolecular force General Chemistry Photochemistry Porphyrin law.invention Photoexcitation chemistry.chemical_compound Paramagnetism Electron transfer chemistry law Intramolecular force Singlet state Electron paramagnetic resonance
Zdroj:	Journal of Porphyrins and Phthalocyanines. :58-66
ISSN:	1099-1409 1088-4246
DOI:	10.1002/1099-1409(200101)5:1<58::aid-jpp297>3.0.co;2-b
Popis:	Porphyrins and related compounds are basic moieties which upon photoexcitation produce paramagnetic transients important to many processes in biology, material science and light–energy conversion. This short review demonstrates the application of time-resolved EPR spectroscopy to two processes in which the photoexcited singlet and/or triplet are involved: (1) intramolecular electron transfer in photoexcited donor–acceptor systems embedded in liquid crystals, where the porphyrins are the electron donors attached to different types of acceptors; and (2) intermolecular magnetic interactions between photoexcited porphyrin triplets and free radicals. In both systems the electron spin plays an important part with regards to the route of the magnetic interactions involved.
Databáze:	OpenAIRE
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