Dielectric Response of Different Alcohols in Water-Rich Binary Mixtures from THz Ellipsometry
Zahra Mazaheri,
Gian Paolo Papari,
Antonello Andreone
Abstract:We report a study on the hydrogen bonding mechanisms of three aliphatic alcohols (2-propanol, methanol, and ethanol) and one diol (ethylene glycol) in water solution using a time-domain ellipsometer in the THz region. The dielectric response of the pure liquids is nicely modeled by the generalized Debye–Lorentz equation. For binary mixtures, we analyze the data using a modified effective Debye model, which considers H-bond rupture and reformation dynamics and the motion of the alkyl chains and of the OH groups… Show more
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