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.

引用

页码：48 / 52

页数：5