TRIPLET EXCITED-STATE BEHAVIOR OF FULLERENES - PULSE-RADIOLYSIS AND LASER FLASH-PHOTOLYSIS OF C-60 AND C-70 IN BENZENE

被引：172
作者：
DIMITRIJEVIC, NM
KAMAT, PV
机构：
[1] Radiation Laboratory, University of Notre Dame, Notre Dame
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 12期
关键词：
D O I：
10.1021/j100191a017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Both pulse radiolysis and laser flash photolysis techniques have been employed to characterize the triplet excited state behavior of C60 and C70 in benzene at 296 K. Apart from the previously reported absorption in the visible, we were able to characterize its absorption in the UV region and determine the extinction coefficients in the visible region. Pulse radiolysis experiments give indirect confirmation for the spectral features of the triplet excited states. Self-quenching processes such as the ground-state quenching (2 x 10(8) M-1 s-1 for C-3(60)* and 6 x 10(8) M-1 s-1 for C-3(70)*) and triplet-triplet annihilation (2k = 1.8 x 10(9) M-1 s-1 for C-3(60)* and 2k = 2 x 10(9) M-1 s-1 for C-3(70)*) can lead to the rapid deactivation of the triplet excited state.
引用
收藏
页码：4811 / 4814
页数：4
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