Photoinduced charge-separation and charge-recombination processes of oligo(thienyleneethynyl)-fullerene dyad molecules

Mamoru Fujitsuka, Takashi Makinoshima, Atushi Takamizawa, Yasuyuki Araki, Osamu Ito, Yuko Obara, Yoshio Aso, Tetsuo Otsubo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Photoinduced charge-separation and -recombination processes in two series of oligo(thienyleneethynyl)-fullerene dyads (abbreviated as nTE-C 60), in which the nTE moiety has a linear (nαTE) or zigzag structure (nβTE), have been investigated by using transient absorption spectroscopy with sub-picosecond laser flash photolysis. Based on the transient absorption spectra, charge separation occurs in nTE-C 60 with the rate constants on the order of 10 11 s -1, indicating almost quantitative charge separation. For all nTE-C 60 dyads, the charge-separation rate-constants in toluene were larger than those in benzonitrile, suggesting that the charge-separation process is a solvent-controlled adiabatic process. On the other hand, the charge-recombination processes going back to the ground state occurred with the rate constants on the order of 10 8-10 9 s -1. The charge-recombination rate of nαTE-C 60 was faster than that in nβTE-C 60 with a zigzag structure, in spite of similar free energy change for the charge recombination.

Original languageEnglish
Pages (from-to)1860-1868
Number of pages9
JournalBulletin of the Chemical Society of Japan
Volume79
Issue number12
DOIs
Publication statusPublished - 2006 Dec 22

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint Dive into the research topics of 'Photoinduced charge-separation and charge-recombination processes of oligo(thienyleneethynyl)-fullerene dyad molecules'. Together they form a unique fingerprint.

  • Cite this