Incommensurate-Commensurate Phase Transition of Intramolecular Hydrogen-Bonded System: 5-Bromo-9-Deuteroxyphenalenone(d-BrHPLN).

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Author(s)

    • Tamura Itaru
    • Department of Physics, Faculty of Science, Chiba University, Yayoi, Chiba 263
    • Kuroiwa Yoshihiro
    • Department of Physics, Faculty of Science, Chiba University, Yayoi, Chiba 263
    • Mochida Tomoyuki
    • Department of Pure and Applied Sciences, College of Arts and Sciences, The University of Tokyo, Komaba, Tokyo 153
    • Sugawara Tadashi
    • Department of Pure and Applied Sciences, College of Arts and Sciences, The University of Tokyo, Komaba, Tokyo 153

Abstract

Low-temperature X-ray Weissenberg photographs of deuterated 5-bromo-9-hydroxyphenalenone (d-BrHPLN) were taken at 14.4, K to investigate the phase transition of an intramolecular and isolated hydrogen-bonded system composed of a tautomeric molecule. The system has one hydrogen bond in a rigid molecular skeleton, with the hydrogen atom being replaced by deuterium. The superlattice reflection is found at (h k+0.5 0) at 14.4, K, and it starts to deviate from the commensurate position above T<SUB>C</SUB>=22.8, K on heating. The transition is of the first kind and is characterized by a commensurate-incommensurate transition. The peak shift defined as 0.5+δ was also measured. Above T<SUB>I</SUB>=34.5, K, the profile becomes very broad and shows diffuse scattering behavior. The transition is of the second kind and is characterized by a so-called incommensurate-normal phase transition.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 63(12), 4286-4289, 1994

    The Physical Society of Japan (JPS)

Cited by:  5

Codes

  • NII Article ID (NAID)
    110001956771
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    0031-9015
  • NDL Article ID
    3595002
  • NDL Source Classification
    MC61(分子・物性)
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJPref  NDL  NII-ELS  J-STAGE 
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