Remarkable Dependence of the Final Charge Separation Efficiency on the Donor-Acceptor Interaction in Photoinduced Electron Transfer

Tomohiro Higashino, Tomoki Yamada, Masanori Yamamoto, Akihiro Furube, Nikolai V. Tkachenko, Taku Miura, Yasuhiro Kobori, Ryota Jono, Koichi Yamashita, Hiroshi Imahori

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

The unprecedented dependence of final charge separation efficiency as a function of donor-acceptor interaction in covalently-linked molecules with a rectilinear rigid oligo-p-xylene bridge has been observed. Optimization of the donor-acceptor electronic coupling remarkably inhibits the undesirable rapid decay of the singlet charge-separated state to the ground state, yielding the final long-lived, triplet charge-separated state with circa 100 % efficiency. This finding is extremely useful for the rational design of artificial photosynthesis and organic photovoltaic cells toward efficient solar energy conversion. Optimization of donor-acceptor electronic coupling remarkably inhibits the undesirable rapid decay of the singlet charge-separated state to the ground state, yielding the final long-lived, triplet charge-separated state with circa 100 % efficiency. This finding is relevant to the rational design of artificial photosynthesis and organic photovoltaic cells.

Original languageEnglish
Pages (from-to)629-633
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number2
DOIs
Publication statusPublished - 2016 Jan 11
Externally publishedYes

Keywords

  • Marcus theory
  • charge separation
  • electron transfer
  • electronic coupling
  • exciplexes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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