Photoinduced electron transfer in supramolecular donor-acceptor dyads of Zn corrphycene

Mamoru Fujitsuka, Hisashi Shimakoshi, Yui Tei, Kazumasa Noda, Sachiko Tojo, Yoshio Hisaeda, Tetsuro Majima

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Porphyrins have been used by various researchers as important building blocks of photofunctional molecules, while the number of studies on the excitation properties of the structural isomers of porphyrins is small when compared to those of porphyrins. In the present study, photoinduced electron transfer (ET) processes of supramolecular donor-acceptor dyads of 2,3,6,7,11,12,17,18-octaethylcorrphycenatozinc (ZnCn), one of the porphyrin isomers, and some imide compounds, which can coordinate to the central Zn ion as an electron acceptor, were investigated. Formation of the supramolecular donor-acceptor dyads was confirmed by steady state absorption change. Charge separation and charge recombination processes upon photoexcitation of ZnCn of the supramolecular dyads were successfully observed by subpicosecond laser flash photolysis. The estimated ET rates (kET) were compared with those of other porphyrin isomers. Differences in the driving force dependence of k ET values of porphyrin isomers were attributed to the electronic coupling and internal reorganization energy. Electronic and structural factors, which brought about the difference in kET values, were reasonably explained on the basis of the theoretical calculation.

Original languageEnglish
Pages (from-to)5677-5683
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number15
DOIs
Publication statusPublished - Apr 21 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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