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 language | English |
|---|---|
| Pages (from-to) | 42-48 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 524 |
| DOIs | |
| Publication status | Published - Feb 6 2012 |
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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 journal › Article
}
TY - JOUR
T1 - 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
AU - Tahara, Hironobu
AU - Yonemura, Hiroaki
AU - Harada, Satoko
AU - Nakashima, Akio
AU - Yamada, Sunao
PY - 2012/2/6
Y1 - 2012/2/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84856103579&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856103579&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2011.12.037
DO - 10.1016/j.cplett.2011.12.037
M3 - Article
AN - SCOPUS:84856103579
VL - 524
SP - 42
EP - 48
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -