Spin chemistry investigation of peculiarities of photoinduced electron transfer in donor-acceptor linked system
Photoinduced intramolecular electron transfer in linked systems, (R,S)- and (S,S)-naproxen-N-methylpyrrolidine dyads, has been studied by means of spin chemistry methods [magnetic field effect and chemically induced dynamic nuclear polarization (CIDNP)]. The relative yield of the triplet state of th...
| Autores: | , , , , , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2011 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglês |
| OAI Identifier: | oai:riunet.upv.es:10251/47423 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/47423 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Radical-ion-pairs External magnetic-field Laser Flash-Photolysis Time-resolved cidnp Naphthalene-amine dyads Geminate recombination Polar-solvents NMR detection Fluorescence Photochemistry QUIMICA ORGANICA QUIMICA ANALITICA |
| Resumo: | Photoinduced intramolecular electron transfer in linked systems, (R,S)- and (S,S)-naproxen-N-methylpyrrolidine dyads, has been studied by means of spin chemistry methods [magnetic field effect and chemically induced dynamic nuclear polarization (CIDNP)]. The relative yield of the triplet state of the dyads in different magnetic field has been measured, and dependences of the high-field CIDNP of the N-methylpyrrolidine fragment on solvent polarity have been investigated. However, both (S,S)- and (R,S)-enantiomers demonstrate almost identical CIDNP effects for the entire range of polarity. It has been demonstrated that the main peculiarities of photoprocesses in this linked system are connected with the participation of singlet exciplex alongside with photoinduced intramolecular electron transfer in chromophore excited state quenching. |
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