Photoinduced electron-transfer reactions and magnetic field effects on the decay rates of a photogenerated biradical from zinc porphyrin-viologen linked compounds in an ionic liquid

Hironobu Tahara, Hiroaki Yonemura, Satoko Harada, Akio Nakashima, Sunao Yamada

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Fluorescence and transient absorption spectra of zinc-porphyrin (ZnP)-viologen linked compounds with various methylene groups indicate that intramolecular electron-transfer from the singlet or triplet excited state of ZnP to viologen occurred and a biradical was generated in the ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate) at various temperatures (283-343 K). The decay rate constants of the biradical decreased in 0-0.2∼0.5 T and became constant in 0.2∼0.5-1 T. Unique effects of temperature and methylene chain length on electron-transfer and magnetic field effects were observed and are probably due to the properties of the ionic liquid as compared with benzonitrile.

Original languageEnglish
Pages (from-to)42-48
Number of pages7
JournalChemical Physics Letters
Volume524
DOIs
Publication statusPublished - Feb 6 2012

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Viologens
Magnetic field effects
Ionic Liquids
methylene
porphyrins
decay rates
electron transfer
zinc
Electrons
liquids
Chain length
Excited states
magnetic fields
Absorption spectra
Rate constants
Fluorescence
absorption spectra
fluorescence
Temperature
temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Photoinduced electron-transfer reactions and magnetic field effects on the decay rates of a photogenerated biradical from zinc porphyrin-viologen linked compounds in an ionic liquid. / Tahara, Hironobu; Yonemura, Hiroaki; Harada, Satoko; Nakashima, Akio; Yamada, Sunao.

In: Chemical Physics Letters, Vol. 524, 06.02.2012, p. 42-48.

Research output: Contribution to journalArticle

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