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Investigation of hydrogen bonding in aqueous acetone mixtures by Raman spectroscopy
Author(s) -
Yang Bo,
Liu Zhe,
Wang Shenghan,
Sun Chenglin,
Men Zhiwei
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6169
Subject(s) - acetone , raman spectroscopy , chemistry , aqueous solution , molecule , hydrogen bond , methanol , analytical chemistry (journal) , inorganic chemistry , organic chemistry , physics , optics
The Raman spectra of aqueous acetone solution with various concentrations were measured at room temperature and atmospheric pressure. We find that the peak at ~3400 cm −1 showed a significant blue shift at V a ( V a represents the volume fraction of acetone) >0.2, whereas the peak at 197 cm −1 exhibited red shift under the same conditions. The results indicate that the cage structure of water is destroyed and a large number of water molecules form acetone–water complex with acetone molecules. Moreover, the acetone–water complex from the acetone–(water) 2 structure gradually changed to acetone–water at V a > 0.6. In addition, the Raman spectra of methyl groups were also studied, which illustrates that the methyl group of acetone forms a hydrophobic hydrated structure. Finally, the phase transition process of acetone–water complex in methanol–water binary solution was discussed.