Study on the ultrafast dynamics of o-xylene cation by combined fs-photoelectron imaging-photofragmentation spectroscopy

被引：6
作者：
Liu, Yuzhu [1 ]
Radi, Peter [1 ]
Gerber, Thomas [1 ]
Knopp, Gregor [1 ]
机构：
[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
来源：
CHEMICAL PHYSICS | 2014年 / 442卷
关键词：
Ultrafast dynamics; Ion cation; o-Xylene; Photoelectron imaging; INTERNAL-CONVERSION; FEMTOSECOND;
D O I：
10.1016/j.chemphys.2014.02.009
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：
Ultrafast dynamics of o-xylene cation has been studied by time resolved fs-photofragmentation (PF) spectroscopy in combination with photoelectron imaging (PEI). In the experiment, multiphoton ionization is used to prepare the o-xylene cation characterized by PEI. The ultrafast dynamics of o-xylene ions are measured by monitoring the time dependent parent-ion depletion and the fragment-ion formation, simultaneously. An ultrafast relaxation time of the parent ion of 734 (+/- 61) fs has been observed. The PEI-PF measurements support the interpretation of this relaxation channel to a combination of internal conversion between the two ionic states (D-0 and D-1) and intramolecular vibrational-energy redistribution process within the D-0 state. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：48 / 52
页数：5
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