Solid-state structure and electronic states of hydrogen-bonded dimer of pyridyl-substituted tetrathiafulvalene salted with PF6-

Tomoaki Kanetou, Ryo Tsunashima, Norihisa Hoshino, Tomoyuki Akutagawa

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    3 Citations (Scopus)

    Abstract

    Hydrogen bonding was investigated in a newly prepared salt of pyridyl-substituted tetrathiafulvalene (TTFPy) that formed a dimer structure by hydrogen bonding and was salted with PF6- anions, namely, (TTFPy2H)PF6 (1). Structural analysis of the salt by single-crystal X-ray diffraction and temperature-dependent FTIR spectra and measurements of its electrical conductivity and dielectric properties were performed. Thermal fluctuations were investigated for protons between two TTFPy molecules. An anisotropic dielectric anomaly was observed owing to local proton transfer between two pyridyl moieties. This behavior was well explained by a model of Debye-type dipole relaxation. In addition, DFT calculations showed that the dipole originated from local proton transfer, but the dipole moment in a network of TTFPy⋯H+⋯TTFPy dimers was amplified by a factor of 2 owing to coupling with the electronic polarization of TTFPy moieties.

    Original languageEnglish
    Pages (from-to)6236-6241
    Number of pages6
    JournalRSC Advances
    Volume7
    Issue number11
    DOIs
    Publication statusPublished - 2017

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)

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