PARAMAGNETIC STATES AND DYNAMICS OF PHOTOEXCITED C-60

被引：43

作者：

LEVANON, H

MEIKLYAR, V

MICHAELI, A

MICHAELI, S

REGEV, A

机构：

[1] HEBREW UNIV JERUSALEM,FARKAS CTR LIGHT INDUCED PROC,IL-91904 JERUSALEM,ISRAEL

[2] HEBREW UNIV JERUSALEM,DIV CHEM,IL-91904 JERUSALEM,ISRAEL

[3] ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 15期

关键词：

D O I：

10.1021/j100194a009

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：

Photoexcited triplet and photoinduced doublet states of C60, oriented in a nematic liquid crystal (LC) and toluene, were studied by time-domain EPR. The data indicate that in both matrices, C-3(60) undergoes temperature dependent molecular rotation. However, whereas in the LC the rotation rate is increased monotonously between 7 and 298 K, the dynamics in toluene depends strongly on its phase diagram. About the melting point of toluene, a polarized doublet is observed concurrently with the disappearance of the triplet. At higher temperatures, where the liquid phase prevails, the dynamics of the photoinduced doublet suggests an unpaired electron delocalized on an aggregate of C60 in toluene, with relatively long-lived magnetization of approximately 25-mu-s.

引用

页码：6128 / 6131

页数：4

共 26 条

[1] THERMODYNAMIC ASPECTS OF THE VITRIFICATION OF TOLUENE, AND XYLENE ISOMERS, AND THE FRAGILITY OF LIQUID HYDROCARBONS [J].