OH fragment from benzoic acid monomer photolysis: Threshold and product state distribution

被引：11

作者：

Wei, Qiang ^{[1
]}

Sun, Ju-Long ^{[1
]}

Yue, Xian-Fang ^{[1
]}

Cheng, Shi-Bo ^{[1
]}

Zhou, Can-Hua ^{[1
]}

Yin, Hong-Ming ^{[1
]}

Han, Ke-Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2008年 / 112卷 / 21期

关键词：

D O I：

10.1021/jp711806u

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：

Photodissociation dynamics of benzoic acid monomer (BAM) at different ultraviolet excitation wavelengths (280-295 nm) has been investigated. The nascent OH product state distributions were measured using the laser-induced fluorescence (LIF) technique. The rotational state distributions, the A-doublet-state ratio, and spin-orbit state distributions of the OH fragment were also measured at 280-294 nm. The OH fragments are vibrationally cold, and their rotational state distributions are peaked at J '' = 3.5 at each photolysis wavelength. No LIF signal of OH fragments was observed at 295 rim. The photodissociation threshold is determined to be 102.5-103.9 kcal/mol for OH channel. The dissociative state and mechanism have been discussed for OH produced from the photodissociation of BAM.

引用

页码：4727 / 4731

页数：5

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