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Structure, physical properties and phase transition of a TCNQ salt of 1 : 2 stoichiometry : DECA (TCNQ)2

  • S. Flandrois
  • M. L. Choukroun
  • P. Delhaes
  • D. Chasseau
  • J. Gaultier
  • C. Hauw
  • M. T. Hiraboure
  • P. Dupuis
VI. Charge Transfer Salts other than TTF-TCNQ and its Derivatives
Part of the Lecture Notes in Physics book series (LNP, volume 65)

Abstract

In this paper, we discuss an irreversible phase transition occuring in the TCNQ salt which diethylcyclohexylammonium cation : DECA (TCNQ)2, when heated above 350 K. The transition, which is of first order as evidenced by heat capacity measurements, is accompanied by very large discontinuities in properties such as magnetic susceptibility and d. c. electrical conductivity. The phase diagram [P = f(T)] has been determined, as well as the crystal structures of both phases. The observed structural transformation allows us to explain the temperature behaviour of the physical properties.

Keywords

Phase Transition Magnetic Susceptibility Electrical Resistivity Thermal Variation Heat Capacity Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1977

Authors and Affiliations

  • S. Flandrois
    • 1
  • M. L. Choukroun
    • 1
  • P. Delhaes
    • 1
  • D. Chasseau
    • 2
  • J. Gaultier
    • 2
  • C. Hauw
    • 2
  • M. T. Hiraboure
    • 2
  • P. Dupuis
    • 3
  1. 1.Centre de Recherches Paul PascalTalence
  2. 2.Laboratoire de CristallographieTalence
  3. 3.Laboratoire de Chimie Physique MacromoléculaireNancyFrance

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