Phase transitions in layer structured (C10H21 NH3)2SnCl6

K. W. Lee, M. W. Park, C. Rhee, Cheol Eui Lee, J. K. Kang, K. W. Kim, K. S. Lee

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Abstract

Phase transitions in the quasi-two-dimensional layer structured (C10H21NH3)2SnCl6, an order-disorder transition and a conformational transition of the hydrocarbon chains, were studied by means of 1H NMR (nuclear magnetic resonance). A newly defined order parameter in the low-temperature phase, the dipolar splitting of the rigid hydrocarbon lineshape component, was shown to represent the order-disorder motion of the hydrocarbon chains, explicitly revealing its three-dimensionality. The conformational transition was marked by a discontinuity in the spin-lattice relaxation rate (1/T1). On the other hand, no obvious anomaly was observed in the spin-lattice relaxation rate at the order-disorder transition at 200 MHz, whereas a weak anomaly was observed at 45 MHz, indicating that the critical dynamics associated with the order-disorder transition is manifest in the low-frequency region of the spectral density.

Original languageEnglish
Pages (from-to)3019-3022
Number of pages4
JournalJournal of Chemical Physics
Volume108
Issue number7
DOIs
Publication statusPublished - 1998 Feb 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Lee, K. W., Park, M. W., Rhee, C., Lee, C. E., Kang, J. K., Kim, K. W., & Lee, K. S. (1998). Phase transitions in layer structured (C10H21 NH3)2SnCl6. Journal of Chemical Physics, 108(7), 3019-3022. https://doi.org/10.1063/1.475689