首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Vibrational-torsional excitation and direct overtone photodissociation of ethyl hydroperoxide at 5v(OH)
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Vibrational-torsional excitation and direct overtone photodissociation of ethyl hydroperoxide at 5v(OH)

机译:氢过氧化物在5v(OH)的振动扭转激发和直接泛音光解离

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摘要

We have observed OH radical products from the unimolecular dissociation of ethyl hydroperoxide (CH3CH2OOH) excited to 5v(OH) and have collected an action spectrum from 15 600 to 16 800 cm(-1) and an OH product state distribution at the maximum (16 119 cm-1). We use a vibrational-torsional model to simulate spectra in the 5v(OH) region for the trans and gauche conformers. A combination of the two simulated spectra resembles the experimental action spectrum, provided that the trans conformer is assumed to dominate at room temperature. Energy disposal in the OH fragment yields an upper limit for the O-O bond dissociation energy at D-0 < 44 kcal mol(-1).
机译:我们已经观察到氢过氧化物乙基(CH3CH2OOH)的单分子解离后的OH自由基产物被激发到5v(OH)并收集了15600至16800 cm(-1)的作用谱和最大的OH产物状态分布(16 119厘米-1)。我们使用振动扭转模型来模拟反式和gauche构象异构体在5v(OH)区域的光谱。如果假定反式构象异构体在室温下起主要作用,则两个模拟光谱的组合类似于实验作用谱。 OH片段中的能量处置在D-0 <44 kcal mol(-1)时产生O-O键离解能的上限。

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