Photoinduced electron transfer in Zn(II)porphyrin-bridge-Pt(II)acetylide Complexes: Variation in rate with anchoring group and position of the bridge

Erik Göransson, Julien Boixel, Cyrille Monnereau, Errol Blart, Yann Pellegrin, Hans Christian Becker, Leif Hammarström, Fabrice Odobel

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)9823-9832
Number of pages10
JournalInorganic Chemistry
Volume49
Issue number21
DOIs
Publication statusPublished - Nov 1 2010

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Porphyrins
porphyrins
electron transfer
Electrons
Quenching
Rapid quenching
quenching
Platinum
Excited states
attachment
polarity
platinum
zinc
Molecules
rings
synthesis
excitation
molecules

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Photoinduced electron transfer in Zn(II)porphyrin-bridge-Pt(II)acetylide Complexes : Variation in rate with anchoring group and position of the bridge. / Göransson, Erik; Boixel, Julien; Monnereau, Cyrille; Blart, Errol; Pellegrin, Yann; Becker, Hans Christian; Hammarström, Leif; Odobel, Fabrice.

In: Inorganic Chemistry, Vol. 49, No. 21, 01.11.2010, p. 9823-9832.

Research output: Contribution to journalArticle

Göransson, Erik ; Boixel, Julien ; Monnereau, Cyrille ; Blart, Errol ; Pellegrin, Yann ; Becker, Hans Christian ; Hammarström, Leif ; Odobel, Fabrice. / Photoinduced electron transfer in Zn(II)porphyrin-bridge-Pt(II)acetylide Complexes : Variation in rate with anchoring group and position of the bridge. In: Inorganic Chemistry. 2010 ; Vol. 49, No. 21. pp. 9823-9832.
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AU - Monnereau, Cyrille

AU - Blart, Errol

AU - Pellegrin, Yann

AU - Becker, Hans Christian

AU - Hammarström, Leif

AU - Odobel, Fabrice

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