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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >The CN stretching band of aliphatic thiocyanate is sensitive to solvent dynamics and specific solvation
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The CN stretching band of aliphatic thiocyanate is sensitive to solvent dynamics and specific solvation

机译：脂族硫氰酸酯的CN拉伸带对溶剂动力学和特定溶剂化敏感

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摘要

Infrared absorption spectra in the C N stretching frequency region were collected for methyl thiocyanate, the simplest model aliphatic thiocyanate, in several common solvents to establish the dependence of the C N spectral band of aliphatic thiocyanate on its local solvation environment. Systematic changes in the C N bandwidth indicate that it reports on fast solvation dynamics. Anomalous asymmetry and temperature dependence of the C N band in fluorinated alcohol solvents indicates that these solvents participate in formation of a discrete hydrogen-bonded complex with the C N end of methyl thiocyanate. These observations indicate that the C N band of thiocyanate could be an effective site-specific probe of both specific hydrogen bonding and local dynamics in more complex systems, such as peptides and proteins.
机译：在几种常见溶剂中收集最简单的脂肪族硫氰酸酯模型硫氰酸甲酯的C N拉伸频率区域的红外吸收光谱，以建立脂肪族硫氰酸酯C N谱带对其局部溶剂化环境的依赖性。 C N带宽的系统变化表明它报告了快速的溶剂化动力学。氟化醇溶剂中C N带的反常性和温度依赖性异常表明，这些溶剂参与了与硫氰酸甲酯的C N端形成离散氢键结合的络合物的形成。这些观察结果表明，在更复杂的系统（例如肽和蛋白质）中，硫氰酸盐的C N带可能是特定氢键和局部动力学的有效位点特异性探针。

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