Photoinduced Electron Transfer in Zn(II)porphyrin−Bridge−Pt(II)acetylide Complexes: Variation in Rate with Anchoring Group and Position of the Bridge
| Autor: | Erik Göransson, Leif Hammarström, Cyrille Monnereau, Julien Boixel, Fabrice Odobel, Yann Pellegrin, Errol Blart, Hans-Christian Becker |
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| Přispěvatelé: | Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie - UMR5182 (LC), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Institut de Chimie du CNRS (INC), Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Organoplatinum Compounds
Metalloporphyrins Photochemistry Electrons 010402 general chemistry 01 natural sciences Photoinduced electron transfer Inorganic Chemistry chemistry.chemical_compound Electron transfer Ultrafast laser spectroscopy polycyclic compounds Molecule Singlet state Physical and Theoretical Chemistry ComputingMilieux_MISCELLANEOUS Molecular Structure 010405 organic chemistry [CHIM.ORGA]Chemical Sciences/Organic chemistry Acetylide Stereoisomerism [CHIM.MATE]Chemical Sciences/Material chemistry Porphyrin 0104 chemical sciences [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Zinc [CHIM.POLY]Chemical Sciences/Polymers chemistry Excited state |
| Zdroj: | Inorganic Chemistry Inorganic Chemistry, American Chemical Society, 2010, 49 (21), pp.9823-9832. ⟨10.1021/ic100605t⟩ Inorganic Chemistry, 2010, 49 (21), pp.9823-9832. ⟨10.1021/ic100605t⟩ |
| ISSN: | 0020-1669 1520-510X |
| DOI: | 10.1021/ic100605t⟩ |
| Popis: | The synthesis and photophysical characterization of two sets of zinc porphyrin platinum acetylide complexes are reported. The two sets of molecules differ in the way the bridging phenyl-ethynyl unit is attached to the porphyrin ring. One set is attached via an ethynyl unit on the β position, while the other set is attached via a phenyl unit on the meso position of the porphyrin. These were compared with previously studied complexes where attachment was made via an ethynyl unit on the meso position. Femtosecond transient absorption measurements showed in all systems a rapid quenching of the porphyrin singlet state. Electron transfer is suggested as the quenching mechanism, followed by an even faster recombination to form both the porphyrin ground and triplet excited states. This is supported by the variation in quenching rate and porphyrin triplet yield with solvent polarity, and the observation of an intermediate state in the meso-phenyl linked systems. The different linking motifs between the dyads resulted in significant variations in electron transfer rates. |
| Databáze: | OpenAIRE |
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