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.
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