CONCENTRATION QUENCHING OF PHOTOLUMINESCENT RU(BPY)(3)(2+) DISPERSED IN A POLYSILOXANE FILM CONTAINING 2,2'-BIPYRIDINE PENDANT GROUPS IN DEPENDENCE OF MOLECULAR-DISTRIBUTION

被引:15
作者
NAGAI, K
UENO, Y
TAKAMIYA, N
KANEKO, M
机构
[1] WASEDA UNIV,SCH SCI & ENGN,DEPT CHEM,SHINJUKU KU,TOKYO 169,JAPAN
[2] INST PHYS & CHEM RES,WAKO,SAITAMA 35101,JAPAN
关键词
D O I
10.1002/macp.1995.021960423
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The photoluminescent Ru(bpy)(3)(2+) complex was dispersed in a polysiloxane film containing 2,2'-bipyridine (bpy) pendant groups. The unusually long photoluminescence lifetime of the Ru(bpy)(3)(2+) (1,94 mu s at 25 degrees C) and the blue-shifted photoluminescent wavelength suggest a rigid polymer matrix. The fluorescence yield becomes lower with higher probe concentration, indicating concentration quenching. According to the analysis based on Stern-Volmer plots, the quenching obeys a mechanism composed of both static and dynamic processes. A statistical intermolecular distance distribution between the probes was used to interpret the results in terms of static and dynamic quenching. It is shown that in the present system the dispersed complexes diffuse slightly during the excited state.
引用
收藏
页码:1241 / 1250
页数:10
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