Nuclear magnetic resonance measurements reveal the origin of the Debye process in monohydroxy alcohols

Abstract

Monohydroxy alcohols show a structural relaxation and at longer time scales a Debye-type dielectric peak. From spin-lattice relaxation experiments using different nuclear probes an intermediate, slower-than-structural dynamics is identified for n-butanol. Based on these findings and on diffusion measurements, a model of self-restructuring, transient chains is proposed. The model is demonstrated to explain consistently the so far puzzling observations made for this class of hydrogen-bonded glass forming liquids.

4 pages, 4 figures

References in corpus (1)

• Investigation of the shear-mechanical and dielectric relaxation processes in two mono-alcohols close to the glass transition

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