On the Ligand-to-Metal Charge-Transfer Photochemistry of the Copper(II) Complexes of Quercetin and Rutin
| Autor: | María J. Aguirre, Simonet Torres, Guillermo Ferraudi, Betty Matsuhiro, Nancy P. Chandía, Mauricio Isaacs, Leonora Mendoza |
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| Rok vydání: | 2011 |
| Předmět: |
Substitution reaction
chemistry.chemical_classification Ligand Organic Chemistry Flavonoid chemistry.chemical_element Photochemistry Biochemistry Copper Redox Catalysis Inorganic Chemistry Metal chemistry.chemical_compound Rutin chemistry visual_art Drug Discovery visual_art.visual_art_medium Physical and Theoretical Chemistry Quercetin |
| Zdroj: | Helvetica Chimica Acta. 94:293-300 |
| ISSN: | 0018-019X |
| DOI: | 10.1002/hlca.201000227 |
| Popis: | In contrast to the UV-photoinduced ligand photoionization of the flavonoid complexes of FeIII, redox reactions initiated in ligand-to-metal charge-transfer excited states were observed on irradiation of the quercetin (1) and rutin (2) complexes of CuII. Solutions of complexes with stoichiometries [CuIIL2] (L=quercetin, rutin) and [CuII2Ln] (n=1, L=quercetin; n=3, L=rutin) were flash-irradiated at 351 nm. Transient spectra observed in these experiments showed the formation of radical ligands corresponding to the one-electron oxidation of L and the reduction of CuII to CuI. The radical ligands remained coordinated to the CuI centers, and the substitution reactions replacing them by solvent occurred with lifetimes τ 1 ms) of the quercetin and rutin radical's decay. |
| Databáze: | OpenAIRE |
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