Abstract

Solutions of dimethylsulfoxide (DMSO) in monoethanolamine (MEA) are studied via IR spectroscopy on a Bruker Tensor 37 FT-IR spectrometer in the wavenumber range of 900–4000 cm⁻¹. The concentrations of DMSO are 2–66 mol %. The region of the stretching vibrations of hydrogen-bonded OH and NH₂ groups (2800–4000 cm⁻¹) and the region of the S=O vibrations of DMSO (900–1100 cm⁻¹) are studied in detail. The obtained data are compared to the IR spectra of solutions of DMSO in ethylene glycol in the regions of OH and S=O stretching vibrations. The effect the NH₂ group in the MEA molecule has on the interaction in the DMSO–MEA system and the physicochemical properties of this system as compared to ethylene glycol solutions of DMSO are discussed.

中文翻译：

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单甲胺中二甲亚砜溶液的红外光谱

摘要

通过Bruker Tensor 37 FT-IR光谱仪在波数范围为900–4000 cm ^-1的红外光谱仪研究了二甲亚砜（DMSO）在单乙醇胺（MEA）中的溶液。DMSO的浓度为2–66 mol％。详细研究了氢键的OH和NH ₂基团的拉伸振动区域（2800–4000 cm ^-1）和DMSO的S = O振动区域（900–1100 cm ^-1）。将获得的数据与OH和S = O拉伸振动区域中DMSO在乙二醇中的溶液的红外光谱进行比较。NH ₂的作用 MEA分子中的基团对DMSO-MEA系统中的相互作用具有影响，并讨论了与DMSO的乙二醇溶液相比，该系统的理化性质。