Temperature dependence of the Eu3+ D-5(0) lifetime in europium tris(2,2,6,6-tetramethyl-3,5-heptanedionato)

被引：183
作者：
Berry, MT
May, PS
Xu, H
机构：
[1] Department of Chemistry, University of South Dakota, Vermillion
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 22期
关键词：
D O I：
10.1021/jp953702x
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：
The temperature dependence of the Eu3+ D-5(0) relaxation rate in solid europium tris(2,2,6,6-tetramethyl-3,5-heptaaedionato) is presented. Eu3+ emission is strongly quenched in the region of room temperature. It is proposed that thermal quenching of D-5(0) emission is via crossover from the D-5(0) to a ligand-to-lanthanide charge transfer state. Activation energies for the crossover process were determined using the models of Mott and of Englman and Jortner, yielding values of 4120 +/- and 5700 +/- 300 cm(-1), respectively. The crossover process is less efficient in media in which Eu(thd)(3) exists as a monomer.
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页码：9216 / 9222
页数：7
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