Abstract
Abstract1, 2‐Ethandiol (ethylene glycol, EG) and its mixtures with water (W) have widespread industrial and biological applications due to their special physiochemical properties. In this study, two‐dimensional correlation spectroscopy and chemometrics analysis of infrared spectra are used to characterize structural features of EG–W binary solutions. Three distinctive regions are observed with diverse contributions of hydrophobic backbone (CH2 groups) and hydrophilic (OH functional) groups. Both groups are simultaneously considered to characterize local structure in each triple region. The aqueous solutions of EG are changed from EG‐like (xw ≤ 0.27) to W‐like solution (xw > 0.83), where xw is W mole fraction. The wide range of EG–W mixtures (0.27 < xw ≤ 0.83) are stabilized by –OH … O (proper hydrogen bonded) and –CH … O (improper hydrogen bonded). Also, trend and relative equilibrium concentration variation of W, EG, and identified cluster are used to propose chemical model of EG–W interaction.
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