H-Bond Interactions in Triethylene Glycol-Acetonitrile Binary Solutions: FTIR Spectral Studies

Abstract

FTIR spectral signature of neat acetonitrile (AN), triethylene glycol (TEG) and their binary solutions at various mole fractions of acetonitrile/triethylene glycol have been obtained. The spectral features endorse that multimers of various orders coexist in liquid phase of triethylene glycol. When triethylene glycol was dissolved in acetonitrile, the combination of multimers present in neat triethylene glycol seems to be not disturbed much but C≡N···H(CH₂/H-O) and (AN methyl)H···O(TEG C-O-C) heteromolecular H-bonds have been formed between the triethylene glycol multimers and acetonitrile in all the solutions. The strength of these interactions were found to be acetonitrile/triethylene glycol concentration dependent.