PULSED EPR ON THE PHOTOEXCITED TRIPLET-STATE OF C(60)-FULLERENE

被引：54
作者：
BENNATI, M
GRUPP, A
MEHRING, M
DINSE, KP
FINK, J
机构：
[1] UNIV STUTTGART,INST PHYS 2,PFAFFENWALDRING 57,W-7000 STUTTGART 80,GERMANY
[2] TH DARMSTADT,INST PHYS CHEM,W-4600 DARMSTADT,GERMANY
[3] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INFP,W-7500 KARLSRUHE 1,GERMANY
来源：
CHEMICAL PHYSICS LETTERS | 1992年 / 200卷 / 05期
关键词：
D O I：
10.1016/0009-2614(92)80072-J
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：
We report on the observation of two different triplet states in photoexcited C60 fullerene molecules. The following fine structure parameters were determined from spectral fits to the triplet powder spectrum: \D1\ = 0.0 1 17 cm-1 (12.5 mT), \E1\ = 0.0014 cm-1 (1.5 mT) and \D2\ = 0.0047 cm-1 (5 mT), \E2\ = 0.0 cm-1. Below 10 K mainly triplet 1 was observed, whereas triplet 2 appeared only with increasing temperature. It is thermally activated with an activation energy DELTAE almost-equal-to 17 meV. Due to motional narrowing the parameters D1 and E1 decrease slightly at higher temperatures. Depopulation kinetics as well as spin-lattice relaxation rates were determined.
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页码：440 / 444
页数：5
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