Anomalous fluorescence in supercooled organic liquids: Correlation with glass/phase transition

被引：0
|
作者：
Kishore, VVNR [1 ]
Periasamy, N [1 ]
机构：
[1] Tata Inst Fundamental Res, Dept Chem Sci, Bombay 400005, Maharashtra, India
来源：
CURRENT SCIENCE | 2002年 / 82卷 / 12期
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D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Anomalous fluorescence of some molecules in organic solvents at low temperature provides a new tool to probe the microscopic dynamics and glass transition in liquids below the freezing point. The fluorescence lifetime of aluminium and zinc complex of 8-hydroxyquinoline increases by an anomalous mechanism in a specific temperature interval: 100-160 K in ethanol, 140-240 K in dimethyl sulphoxide. In ethanol, the temperature dependence of fluorescence lifetime while cooling is different from that while heating. The observed fluorescence anomaly correlates well with the glass/phase transition temperatures of ethanol.
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页码：1449 / 1452
页数：4
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