TRANSIENT HOT UV SPECTRA IN THE COLLISIONAL DEACTIVATION OF HIGHLY EXCITED TRANS-STILBENE IN LIQUID SOLVENTS

被引：30
作者：
NIKOWA, L
SCHWARZER, D
TROE, J
机构：
[1] Max-Planck-Institut für biophysikalische Chemie Am Faßberg
来源：
CHEMICAL PHYSICS LETTERS | 1995年 / 233卷 / 03期
关键词：
D O I：
10.1016/0009-2614(94)01428-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：
Collisional energy transfer of vibrationally highly excited ground state trans-stilbene, formed by isomerization and internal conversion of electronically excited cis-stilbene, was investigated in liquid n-pentane and methanol. The temporal evolution of the trans-stilbene absorption spectrum between 295 and 310 nm was reconstructed from wavelength dependent fluorescence yields. Energy-loss profiles were generated using separate shock wave studies of stilbene high temperature spectra for calibration. Most of the vibrational energy of excited trans-stilbene is transferred to the solvent within 1-2 ps. Subsequently, the cooling process continues on a 10 ps timescale due to local heating of the liquid environment.
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页码：303 / 308
页数：6
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