TY - JOUR
T1 - Pulsed and cw-time-resolved EPR studies of photoinduced electron transfer between zinc(II) porphyrin and fullerene
AU - Fujisawa, Jun Ichi
AU - Ohba, Yasunori
AU - Yamauchi, Seigo
N1 - Funding Information:
We are grateful to Mr. K. Yamamoto and Mr. R. Hanaishi for the help with the FT-EPR measurement. This work was supported by Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists and Grant-in-Aid for Scientific Research No. 08554025 from the Ministry of Education, Science and Culture, Japan.
PY - 1998/9/11
Y1 - 1998/9/11
N2 - Photoinduced electron and energy transfers between ZnTPP-d20 (TPP; tetraphenylporphyrin) and fullerene (C60) were studied in benzonitrile solution at room temperature by means of pulsed-Fourier transform and cw-time-resolved EPR. Two kinds of EPR signals were observed with absorptive spin polarizations and assigned to those of the ZnTPP-d20 cation radical (ZnTPP+) and the lowest excited triplet state of C60. Quantitative analysis of the time-evolution of the 3C60 and ZnTPP+ signals demonstrates that electron transfer occurs from 3ZnTPP to C60 and ZnTPP to 3C60 and triplet-triplet energy transfer from 3ZnTPP to C60. The induced absorptive polarizations of the 3C60 and ZnTPP+ signals are explained by electron spin polarization transfer.
AB - Photoinduced electron and energy transfers between ZnTPP-d20 (TPP; tetraphenylporphyrin) and fullerene (C60) were studied in benzonitrile solution at room temperature by means of pulsed-Fourier transform and cw-time-resolved EPR. Two kinds of EPR signals were observed with absorptive spin polarizations and assigned to those of the ZnTPP-d20 cation radical (ZnTPP+) and the lowest excited triplet state of C60. Quantitative analysis of the time-evolution of the 3C60 and ZnTPP+ signals demonstrates that electron transfer occurs from 3ZnTPP to C60 and ZnTPP to 3C60 and triplet-triplet energy transfer from 3ZnTPP to C60. The induced absorptive polarizations of the 3C60 and ZnTPP+ signals are explained by electron spin polarization transfer.
UR - http://www.scopus.com/inward/record.url?scp=0000884691&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000884691&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(98)00855-0
DO - 10.1016/S0009-2614(98)00855-0
M3 - Article
AN - SCOPUS:0000884691
VL - 294
SP - 248
EP - 254
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -