Probe of Alcohol Structures in the Gas and Liquid States Using C⁻H Stretching Raman Spectroscopy.

Probe of Alcohol Structures in the Gas and Liquid States Using C⁻H Stretching Raman Spectroscopy.
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利用 C-H 拉伸拉曼光谱探测气态和液态的醇结构

DOI:
10.3390/s18072061
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发表时间:
2018-06-28
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Liu S
Liu S
中科院分区:
其他
文献类型:
--
作者:
Yu Y;Fan W;Wang Y;Zhou X;Sun J;Liu S

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振动光谱是探测分子结构和动力学的有力工具,因为它提供了一个独特的指纹,可以进行分子鉴定。振动光谱应用的一个重要方面是发展能够表征分子构象和分子间相互作用等相关性质的探针。文献中已经出现了许多振动探针的例子,包括叠氮基(-N3)、酰胺基(-CONH2)、氰基(-CN)、羟基(-OH)、-CH基等。在这些探针中,-CH基团是一个很好的探针,因为它普遍存在于有机和生物分子中,而且C-H伸缩振动光谱对局部分子环境非常敏感。然而,在C-H探针的应用中遇到的一个挑战来自于由于C-H伸展区域的光谱拥塞而导致的准确指认的困难。本文综述了脂肪醇的C-H伸缩光谱的完全归属以及C-H振动作为构象和弱分子间相互作用探针的最新进展。这些结果充分显示了-CH化学基团作为分子探针的潜力。
Vibrational spectroscopy is a powerful tool for probing molecular structures and dynamics since it offers a unique fingerprint that allows molecular identification. One of important aspects of applying vibrational spectroscopy is to develop the probes that can characterize the related properties of molecules such as the conformation and intermolecular interaction. Many examples of vibrational probes have appeared in the literature, including the azide group (–N3), amide group (–CONH2), nitrile groups (–CN), hydroxyl group (–OH), –CH group and so on. Among these probes, the –CH group is an excellent one since it is ubiquitous in organic and biological molecules and the C–H stretching vibrational spectrum is extraordinarily sensitive to the local molecular environment. However, one challenge encountered in the application of C–H probes arises from the difficulty in the accurate assignment due to spectral congestion in the C–H stretching region. In this paper, recent advances in the complete assignment of C–H stretching spectra of aliphatic alcohols and the utility of C–H vibration as a probe of the conformation and weak intermolecular interaction are outlined. These results fully demonstrated the potential of the –CH chemical group as a molecular probe.
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