Photoinduced electron transfer in zinc porphyrin-crown ether supramolecule with Eu3+ electron acceptor in crown void
| Autor: | Elena E. Batova, V. Ya. Shafirovich, V. Krishnan |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
General Chemical Engineering General Physics and Astronomy chemistry.chemical_element Ether General Chemistry Zinc Electron acceptor Photochemistry Photoinduced electron transfer Electron transfer chemistry.chemical_compound chemistry Intramolecular force Flash photolysis Crown ether |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 84:233-235 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/1010-6030(94)03865-1 |
| Popis: | Photoinduced electron transfer (ET) reactions in the zinc porphyrin-crown ether (ZnPCE) supramolecule, in which one crown ether moiety containing Eu3+ as electron acceptor is convalently linked to zinc porphyrin (ZnP), were studied by flash photolysis. In methanol solutions, highly efficient charge separation occurs via intramolecular ET from3ZnP to Eu3+ encapsulated in the crown ether void k1=(3±1)×103s−1) and intramolecular ET from 3ZnP to uncomplexed Eu3+ (k2=(2.5±0.5)×103s-1). Intermolecular ET from Eu2+ escaped from the crown ether void to ZnP.+ (kr=(4.3±0.7)×108 M−1s−1) seems to be the main pathway of charge recombination. |
| Databáze: | OpenAIRE |
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