TY - JOUR
T1 - Photoinduced electron-transfer and magnetic-field effects on the decay rates of photogenerated biradicals in a phenothiazine-C60 linked compound with six methylene groups
T2 - Temperature dependence
AU - Moribe, Shinya
AU - Yonemura, Hiroaki
AU - Yamada, Sunao
N1 - Funding Information:
The authors are grateful to Mr. H. Horiuchi for the preparation of quartz cells for transient absorption spectral experiments. The authors also thank The Centre of Advanced Instrumental Analysis, Kyushu University, for 1 H-NMR measurements. The present study was financially supported by the grants of the Inamori Foundation and the society for the support of Kyushu University, and by the Grant-in-Aids for Scientific Research: Priority Area of ‘Innovative Utilisation of Strong Magnetic Fields’ (Area 767, No. 15085203) and ‘Molecular Nano Dynamics’ (Area 432, No. 17034051), Scientific Research (C) (No. 17550131), and 21st Century COE Program ‘Function Innovation of Molecular Informatics’ from MEXT of the Japan.
PY - 2006/2
Y1 - 2006/2
N2 - Photoinduced electron-transfer reactions and magnetic-field effects (MFEs) on the decay of photogenerated biradical in a phenothiazine-C60 linked compound with six methylene groups were examined in benzonitrile at various temperatures (283-343 K). The decay rate constants of the biradicals were dramatically decreased in the lower magnetic fields (0-0.2 T) and increased in the higher magnetic fields (0.2-1.0 T). These reverse phenomena in the MFEs were more clearly observed with the increase of temperature and are explained by the contribution of spin-lattice relaxation mechanism due to anisotropic Zeeman interaction. The temperature dependence on the MFEs supports the above mechanism.
AB - Photoinduced electron-transfer reactions and magnetic-field effects (MFEs) on the decay of photogenerated biradical in a phenothiazine-C60 linked compound with six methylene groups were examined in benzonitrile at various temperatures (283-343 K). The decay rate constants of the biradicals were dramatically decreased in the lower magnetic fields (0-0.2 T) and increased in the higher magnetic fields (0.2-1.0 T). These reverse phenomena in the MFEs were more clearly observed with the increase of temperature and are explained by the contribution of spin-lattice relaxation mechanism due to anisotropic Zeeman interaction. The temperature dependence on the MFEs supports the above mechanism.
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U2 - 10.1016/j.crci.2005.09.006
DO - 10.1016/j.crci.2005.09.006
M3 - Article
AN - SCOPUS:30944461174
VL - 9
SP - 247
EP - 253
JO - Comptes Rendus Chimie
JF - Comptes Rendus Chimie
SN - 1631-0748
IS - 2
ER -