Watching hydrogen-bonded structures in an alcohol convert from rings to chains

Lokendra P. Singh, Ranko Richert

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

In hydrogen-bonded liquids including monohydroxy alcohols, the prominent Debye process that often dominates the dielectric relaxation behavior is associated with hydrogen bonding, but its microscopic origin has remained unclear to date. High electric field impedance spectroscopy on 5-methyl-3-heptanol reveals a field-induced change in the Kirkwood-Fröhlich correlation factor g K, viewed as evidence for an electric field driven conversion from ring- to chain-type hydrogen-bonded structures. The concomitant rearrangement of the chain structure is observed to occur on the time scale of the Debye process, suggesting that the Debye peak of monohydroxy alcohols originates from a fluctuation of the net dipole moment via g K of the chain structures on a time scale that is largely controlled by viscosity.

Original languageEnglish (US)
Article number167802
JournalPhysical Review Letters
Volume109
Issue number16
DOIs
StatePublished - Oct 18 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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