PICOSECOND ANALYSIS OF TRANS-STILBENE FLUORESCENCE

被引：52

作者：

HEISEL, F ^{[1
]}

MIEHE, JA ^{[1
]}

SIPP, B ^{[1
]}

机构：

[1] UNIV LOUIS PASTEUR,F-67037 STRASBOURG,FRANCE

来源：

CHEMICAL PHYSICS LETTERS | 1979年 / 61卷 / 01期

关键词：

D O I：

10.1016/0009-2614(79)85099-X

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 appearance of two components in the decay of the emission of trans-stilbene solutions has been re-examined by an analysis of the time resolved fluorescence in the pico- and nanosecond region, above 273 K. The slow component, attributed to a return to the trans-geometry after initial photoisomerization, has not been observed in pure samples. From the measured lifetimes it results that the rate constant ktp for photoisomerization to excited twisted stilbene shows an Arrhenius temperature dependence, with an activation energy of 2.6 kcal/mole and a frequency factor of 1.2 × 1012 s-1. The reverse process has a rate constant kpt with ktp/kpt ≫ 5 × 102. © 1979.

引用

页码：115 / 118

页数：4

共 11 条

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