TY - JOUR
T1 - Magnetic field effects on the decay rate of photogenerated biradical from intramolecular electron transfer of triplet excited fullerene in a fullerene-phenothiazine linked compound
AU - Yonemura, Hiroaki
AU - Tokudome, Hiromasa
AU - Yamada, Sunao
N1 - Funding Information:
The authors are grateful to Dr. T. Akiyama for this contribution in the synthesis of C 60 –PH and to Mr. H. Horiuchi for the preparation of quartz cells for laser photolysis experiments. The present study was financially supported by the grants of KAWASAKI STEEL 21st Century and Shinkagakuhatten, and the Murata Science Foundations, and by the Grant-in-Aids for Scientific Research: Priority Area of `Electrochemistry of Ordered Interfaces' (No. 11118257), and Encouragement of Young Scientists (No. 12750737).
PY - 2001/10/12
Y1 - 2001/10/12
N2 - Transient absorption spectra of a fullerene (C60)-phenothiazine (PH) linked compound indicated that the intramolecular electron transfer occurred in benzonitrile, while not in benzene. In benzonitrile, the lifetime (118 ns) of photogenerated biradical was very long, in spite of being around the top region in Marcus theory. The lifetime of the biradical was enhanced by 1.8 times in the presence of magnetic fields (>0.2 T). The magnetic field effects verified that the triplet biradical was generated from the intramolecular electron transfer from PH to the triplet C60. The long lifetime is most likely ascribed to spin multiplicities of the biradical.
AB - Transient absorption spectra of a fullerene (C60)-phenothiazine (PH) linked compound indicated that the intramolecular electron transfer occurred in benzonitrile, while not in benzene. In benzonitrile, the lifetime (118 ns) of photogenerated biradical was very long, in spite of being around the top region in Marcus theory. The lifetime of the biradical was enhanced by 1.8 times in the presence of magnetic fields (>0.2 T). The magnetic field effects verified that the triplet biradical was generated from the intramolecular electron transfer from PH to the triplet C60. The long lifetime is most likely ascribed to spin multiplicities of the biradical.
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U2 - 10.1016/S0009-2614(01)00986-1
DO - 10.1016/S0009-2614(01)00986-1
M3 - Article
AN - SCOPUS:0011929925
SN - 0009-2614
VL - 346
SP - 361
EP - 367
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 5-6
ER -