Ion imaging studies of the photodissociation dynamics of CH2I2 at 248 nm

被引：24

作者：

Lehman, Julia H. ^{[1
]}

Li, Hongwei ^{[1
]}

Lester, Marsha I. ^{[1
]}

机构：

[1] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

来源：

CHEMICAL PHYSICS LETTERS | 2013年 / 590卷

关键词：

GAS-PHASE OZONOLYSIS; MULTIPHOTON IONIZATION; PHOTOFRAGMENT SPECTRA; INTERMEDIATE; PHOTOELECTRON; SPECTROSCOPY; PHOTOLYSIS; RESONANCE; MOLECULES; RADICALS;

D O I：

10.1016/j.cplett.2013.10.029

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 photodissociation of CH2I2 at 248 nm is investigated using velocity map ion imaging with photoionization detection of the I* (P-2(1/2)) products. The velocity distribution of the I* products reveals that only a small fraction of the available energy is released as translational energy, consistent with a simple impulsive model. Most of the excess energy is channeled into internal excitation with < E-int > = 36.3 kcal mol(-1) for CH2I radical fragments produced with I* atoms. The anisotropy angular distribution of the I* fragments and corresponding positive anisotropy parameter are indicative of prompt dissociation and electronic state mixing. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：16 / 21

页数：6

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