Excited state relaxation of Cr(III) in oxygen environments

被引:15
作者
Forster, LS [1 ]
机构
[1] Univ Arizona, Dept Chem, Tucson, AZ 85721 USA
关键词
Cr(III)-oxygen complexes; fluorescence and phosphorescence; decay time; emission spectra;
D O I
10.1016/j.ccr.2003.10.014
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The emission spectra and excited state decay characteristics of Cr3+ ions in oxide crystals and glasses and molecular complexes are reviewed. The relevant species can be described as CrO6 and both narrow E-2 double right arrow (4)A(2) phosphorescence and broadband T-4(2) double right arrow (4)A(2) fluorescence are observed with intensities and lifetimes that depend on the disposition of the excited levels and the temperature. A unified model that relates the emission in the several environments is described. A kinetic analysis is applied to extract individual rate constants and to determine the origin of the thermal quenching. Kinetic limits on E-2 double right arrow T-4(2) back-transfer are explored. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:261 / 272
页数:12
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