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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Elucidating Intramolecular Vibrational Coupling Mechanisms by Microwave Spectroscopy of Single Vibrationally Mixed Quantum States: Coriolis and Conformer Interactions in Allyl Fluoride
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Elucidating Intramolecular Vibrational Coupling Mechanisms by Microwave Spectroscopy of Single Vibrationally Mixed Quantum States: Coriolis and Conformer Interactions in Allyl Fluoride

机译：通过单个振动混合的量子态的微波光谱阐明分子内的振动耦合机制：烯丙基氟中的科里奥利和二聚体相互作用

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摘要

We have measured the rotational spectra of several molecular eigenstates of the cis and gauche asymmetric hydride stretch in order to determine the nature of the weak vibrational interactions observed in these vibrational bands. The rotational spectra are measured using an infrared-microwave double resonance technique based on the Autler-Townes splitting of states in a strong microwave field. From the rotational spectra, we can detect contribution to the eigenstates from both localized structures (cis and gauche) and states of delocalized structure, or "isomerization states". Evidence of rotational transitions assigned to isomerization states are observed in from the eigenstates prepared in both the cis and gauche vibrational band. Furthermore, detection of Coriolis interactions in the cis band is observed. However, we do not detect any coupling between states localized around different wells of the potential (i.e., cis and gauche) suggesting that the molecule is not undergoing isomerization.
机译：为了确定在这些振动带中观察到的弱振动相互作用的性质，我们已经测量了顺式和不对称氢化物伸展的几个分子本征态的旋转光谱。使用红外-微波双共振技术基于强微波场中状态的Autler-Townes分裂来测量旋转光谱。从旋转光谱中，我们可以检测到局部结构（顺式和薄纱状）和离域结构状态（或“异构化状态”）对本征态的贡献。从顺式和高斯振动带中制备的本征态观察到分配给异构化态的旋转跃迁的证据。此外，观察到在顺式带中检测到科里奥利相互作用。但是，我们未检测到位于电位不同孔周围的状态之间的任何耦合（即顺式和薄纱），表明该分子未进行异构化。

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