Ion imaging study of IO radical photodissociation: Accurate bond dissociation energy determination

被引：26

作者：

Dooley, Kristin S. ^{[1
]}

Geidosch, Justine N. ^{[1
]}

North, Simon W. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 457卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.04.009

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：

We have studied the photodissociation dynamics of expansion-cooled IO radicals at 454.9 nm, corresponding to the A(2) Pi(3/ 2) - X-2 Pi(3/2) (1-0) bandhead, using velocity map ion imaging. The radicals were generated using a late-mixing dual-valve photolytic reactor source. Analysis of the I(P-2(3/ 2)) photofragment speed distribution provides a direct determination of the ground state bond energy of D-0(0)(IO) = 54.9(-0.4) (+0.2) kcal/ mol and a heat of formation 298K of Delta H-f (298)(IO) = 29.2(-0.2)(+0.4) kcal/ mol. (c) 2008 Elsevier B. V. All rights reserved.

引用

页码：303 / 306

页数：4

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