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

Wei Q; Sun JL; Yue XF; Cheng SB; Zhou CH; Yin HM; Han KL

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

机译：苯甲酸单体光解过程中的OH片段：阈值和产物状态分布

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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.

机译：研究了苯甲酸单体（BAM）在不同紫外激发波长（280-295 nm）下的光解离动力学。使用激光诱导荧光（LIF）技术测量新生的OH产物状态分布。还在280-294nm处测量了OH片段的旋转态分布，A-双态态比和自旋轨道态分布。 OH片段振动冷，在每个光解波长处其旋转状态分布在J''= 3.5时达到峰值。在295 rim处未观察到OH片段的LIF信号。 OH通道的光解离阈值确定为102.5-103.9 kcal / mol。已经讨论了BAM光解产生的OH的解离状态和机理。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2008年第21期|共5页
作者
Wei Q; Sun JL; Yue XF; Cheng SB; Zhou CH; Yin HM; Han KL;
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正文语种 eng
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PHOTODISSOCIATION DYNAMICS; 193 NM; ACETIC-ACID; ACRYLIC-ACID; S-2 STATE; DISSOCIATION; PHOTOCHEMISTRY; SPECTRA; CHANNEL; CH3ONO;

机译：光解离动力学;193 NM;乙酸;丙烯酸;S-2态;离解;光化学;光谱;通道;CH3ONO;

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

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