LUMINESCENCE OF THE FLEXIBLE DYE MOLECULE JULOLIDINEMALONONITRILE IN POLYMER MATRICES AT PRESSURES ABOVE 40 KBAR

被引:5
作者
LANG, JM [1 ]
DADALI, AA [1 ]
DRICKAMER, HG [1 ]
机构
[1] UNIV ILLINOIS,FREDERICK SEITZ MAT RES LAB,URBANA,IL 61801
关键词
D O I
10.1016/0009-2614(93)85641-Z
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 study the luminescence efficiency of julolidinemalononitrile (JDMN) as a function of pressure in a series of vinyl polymers, PVAs, PVCl, PS, PVP and P1VN which exhibit increasing polarizability in the order listed. This molecule has both a planar and twisted excited state. Only the former emits luminescence. we concentrate on the behavior at pressures above 40 kbar. A decrease in intensity of emission is found with pressure which is larger, the larger the polarizability of the medium. This decrease results from increased stabilization of the polar twisted state with pressure in the more polarizable media.
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页码:310 / 314
页数:5
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