This brief review presents an overview and analysis of the experimental studies performed recently in the laboratory of the authors demonstrating the role of hydrogen bonding as a promotional factor for intermolecular vibrational energy relaxation, and as a driving force for the occurrences of specific reaction channels in binary molecular complexes. Both vibrational and electronic spectroscopic methods have been used, and measurements have been performed in the supersonic jet expansion, in cold inert gas matrixes and also in suitable liquids at room temperature. Pure and mixed dimers of two types of aromatic chromophores, 7-azaindole and phenol, have been used as the model molecular systems, which involve O–H···O, O–H···N and N–H···N types of hydrogen bonds. The promotional effect of vibrational relaxation has been demonstrated showing large broadening of either of the infrared X–H stretching fundamentals of the donor groups in the hydrogen-bonded X–H···Y network of the binary complexes or broadening of the fluorescence spectra upon excitations to single vibronic levels of the isolated complexes in the gas phase and making comparisons with the corresponding spectra of the monomers. A similar approach has been adopted to demonstrate the promotion of photodissociation and charge transfer reactions in binary complexes by hydrogen bonding.

中文翻译：

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氢键对选定二元分子复合物中振动动力学和光化学的影响

这篇简短的综述对作者最近在实验室进行的实验研究进行了概述和分析，证明氢键作为分子间振动能量弛豫的促进因素，以及作为二元中特定反应通道发生的驱动力的作用。分子复合物。已经使用了振动和电子光谱方法，并且已经在超音速射流膨胀、冷惰性气体基质和室温下的合适液体中进行了测量。两种芳香族发色团 7-氮杂吲哚和苯酚的纯二聚体和混合二聚体已被用作模型分子系统，包括 O–H···O、O-H···N 和 N-H··· N种氢键。振动弛豫的促进作用已被证明显示出二元配合物的氢键 X–H…Y 网络中供体基团的红外 X–H 伸缩基本原理或荧光光谱的加宽激发气相中分离的复合物的单个振动能级，并与单体的相应光谱进行比较。已经采用类似的方法来证明通过氢键促进二元复合物中的光解离和电荷转移反应。