Abstract
The dielectric properties of mixtures of methanol with N-methylpropionamide (NMP) at 20 °C have been investigated over the range of frequency 1 MHz to 4 GHz. The dielectric relaxation is described by a simple Debye dispersion equation, in contrast with the behaviour for many non-aqueous mixtures. An exponential dependence of the relaxation frequency on mole fraction composition reveals two distinct regions of dielectric response, attributed to methanol-dominated and NMP-dominated liquid structures. Results are discussed in terms of the polarisation of a homogeneous liquid of uniformly hydrogen-bonded structure, which varies in character with solvent composition.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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