TY - JOUR
T1 - Magnetic field effects on the decay rates of triplet biradical photogenerated from intramolecular electron-transfer in a zinc- tetraphenylporphyrin-fullerene linked compound
AU - Yonemura, Hiroaki
AU - Nobukuni, Hideki
AU - Moribe, Shinya
AU - Yamada, Sunao
AU - Fujiwara, Yoshihisa
AU - Tanimoto, Yoshifumi
N1 - Funding Information:
The authors are grateful to Mr. H. Horiuchi for the preparation of quartz cells for fluorescence and transient absorption spectral experiments. The authors also thank The Center of Advanced Instrumental Analysis, Kyushu University, for 1 H-NMR measurements, and Professors M. Takagi and S. Takenaka for MS measurements. The present study was financially supported by the Grant-in-Aids for Scientific Research: Priority Area of ‘Fundamental Science and Technology of Photofunctional Interfaces’ (Area 417, No. 14050076) and ‘Innovative Utilization of Strong Magnetic Fields’ (Area 767, No. 15085203), the Grant-in-Aids for Young Scientists (A) (No. 14703023), and for 21 st Century COE Program ‘Function Innovation of Molecular Informatics’ from MEXT of the Japan.
PY - 2004/2/16
Y1 - 2004/2/16
N2 - Transient absorption spectra of a zinc-tetraphenylporphyrin(ZnP)- fullerene(C60) linked compound with flexible eight methylene groups indicated that intramolecular electron-transfer occurred in benzonitrile, while not in toluene. In benzonitrile, the decay rate constant of biradical decreases quickly in lower magnetic fields (<0.1 T), and then increases gradually and finally become almost constant in higher magnetic fields (0.1≤H≤1.2 T). The magnetic field effects (MFEs) verified that the triplet biradical was generated from the intramolecular electron-transfer of the triplet-excited states of ZnP and C60. The reverse phenomenon of the MFEs around 0.1 T is most likely ascribed to the properties of C60 moiety.
AB - Transient absorption spectra of a zinc-tetraphenylporphyrin(ZnP)- fullerene(C60) linked compound with flexible eight methylene groups indicated that intramolecular electron-transfer occurred in benzonitrile, while not in toluene. In benzonitrile, the decay rate constant of biradical decreases quickly in lower magnetic fields (<0.1 T), and then increases gradually and finally become almost constant in higher magnetic fields (0.1≤H≤1.2 T). The magnetic field effects (MFEs) verified that the triplet biradical was generated from the intramolecular electron-transfer of the triplet-excited states of ZnP and C60. The reverse phenomenon of the MFEs around 0.1 T is most likely ascribed to the properties of C60 moiety.
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U2 - 10.1016/j.cplett.2003.12.112
DO - 10.1016/j.cplett.2003.12.112
M3 - Article
AN - SCOPUS:1242293733
SN - 0009-2614
VL - 385
SP - 417
EP - 422
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 5-6
ER -