Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array (Articolo in rivista) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1002/chem.201000375 (literal)

Alternative label

• B. Ventura, L. Flamigni, M. Beyler, V. Heitz, J.-P. Sauvage (2010)
  Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array
  in Chemistry (Weinh., Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• B. Ventura, L. Flamigni, M. Beyler, V. Heitz, J.-P. Sauvage (literal)

Pagina inizio

• 8748 (literal)

Pagina fine

• 8756 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 16 (literal)

Rivista

• Chemistry (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

• DOI: 10.1002/chem.201000375 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 29 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• a. Istituto per la Sintesi Organica e la Fotoreattività (ISOF), CNR, Via P. Gobetti 101, 40129 Bologna (Italy) b. Laboratoire de Chimie Organo-Minérale, Institut de Chimie, Université de Strasbourg, CNRS/UMR 7177, 4, rue Blaise Pascal, 67070 Strasbourg-Cedex (France) (literal)

Titolo

• Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array (literal)

Abstract

• Excitation of the peripheral Zn porphyrin units in a noncovalent five-porphyrin array, formed by gable-like zinc(II) bisporphyrins and a central free-base meso-tetrakis(4-pyridyl)-porphyrin in a 2:1 ratio, (ZnP(2))(2).(TPyP), does not lead to a quantitative sensitization of the luminescence of the free-base porphyrin acceptor, even though there is an effective energy transfer. Time resolution of the luminescence evidences a quenching of TPyP upon sensitization by the peripheral ZnP(2). The time evolution of the TPyP fluorescence in the complex can be described by a bi-exponential fitting with a major component of 180 ps and a minor one of 5 ns, compared to an isolated TPyP lifetime of 9.4 ns. The two quenched lifetimes are shown to be correlated to the presence of 2:1 and 1:1 complexes, respectively. No quenching of TPyP fluorescence occurs in (ZnP(2))(2).(TPyP) at 77 K in a rigid solvent for which only an energy-transfer process (tau=150 +/- 10 ps) from peripheral ZnP(2) to the central TPyP is observed. An unusual HOMO-HOMO electron-transfer reaction from ZnP(2) to the excited TPyP units, responsible for the observed phenomena, is detected. The resulting charge-separated state, (ZnP(2))+(2).(TPyP)(-) is found to recombine to the ground state with a lifetime of 11 ns. (literal)

Prodotto di

• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR

• BARBARA VENTURA (Persona)
• LUCIA FLAMIGNI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR di

• LUCIA FLAMIGNI (Unità di personale interno)
• BARBARA VENTURA (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Chemistry (Rivista)

Insieme di parole chiave di

• Parole chiave di "Unusual Photoinduced Electron Transfer from a Zinc Porphyrin to a Tetrapyridyl Free-Base Porphyrin in a Noncovalent Multiporphyrin Array" (Insieme di parole chiave)