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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received August 27, 2013
Accepted November 21, 2013
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Spectroscopic study on the intermolecular interaction of SO2 absorption in poly-ethylene glycol+H2O systems

College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
liujr@imut.edu.cn
Korean Journal of Chemical Engineering, March 2014, 31(3), 514-521(8), 10.1007/s11814-013-0249-7
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Abstract

Poly-Ethylene Glycol (PEG) 300+H2O solutions (PEGWs) has been used as a promising medium for the absorption of SO2. We investigated the UV, FTIR, 1H-NMR, and fluorescence spectra in the absorption processes of SO2 in PEGWs to present an important absorption mechanism. Based on the spectral results, the possibility of intermolecular hydrogen bond formation by hydroxyl oxygen atom in the PEG molecule with hydrogen atom in H2O and S…O interaction formation by the oxygen atoms in PEG with the sulfur atom in SO2 are discussed. This shows that the spectral changes may be due to the formation of -CH2CH2O(H)…HOH… and -CH2-CH2-O(CH2-CH2-)…HOH… in PEGWs and the formation of -CH2CH2OH…OSO…, and intermolecular S…O interaction between PEG and SO2 as the formation of -CH2CH2OCH2CH2O(H)…(O)S(O)… and -CH2-CH2-O(CH2-CH2-)…(O)S(O)…. The existence of these bonds benefits the absorption and desorption processes of SO2 in PEGWs.

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