NMR Cross-Relaxation Study of Ultraslow Motion of the Domain Wall in Channel Inclusion Compound

A. M. Panich, J. H. Krieger, A. R. Semenov, G. N. Chekhova

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2 Scopus citations

Abstract

We report on an NMR study of ultraslow motions in the channel thiourea-hexachloroethane inclusion compound, [2.95(NH2)2CS]-C2C16. Temperature dependent 1H NMR relaxation measurements of the powder thiourea-hexachloroethane at different resonance frequencies, from 23 to 55.5 MHz, have been carried out. Significant reduction of the spin-lattice relaxation time at 38 and 47 MHz is caused by the cross-relaxation of protons via the quadrupole chlorine nuclei. We show that the effective 1H-35Cl cross-relaxation observed in a powder sample is due to a slow mode process, when the molecules of the domain wall exhibit a correlated translational and rotational motion over the channel. Such propagation of the domain wall is confirmed by atom-atomic potential calculation. - Pacs: 76.60-k, 76.60.Es, 61.44.Fw, 61.66.Hq.

Original languageEnglish
Pages (from-to)395-398
Number of pages4
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume57
Issue number6-7
DOIs
StatePublished - 1 Jan 2002

Keywords

  • Cross-Relaxation
  • Domain Wall
  • Inclusion Compounds
  • NMR
  • Ultraslow Motion

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