Tetramethyldithiadiselenafulvalene (TMDTDSF): Properties of its hexafluorophosphate salt and alloys with tetramethyltetraselenafulvalene

F. Wudl, W. M. Walsh, J. J. Hauser, F. J. Disalvo, D. Nalewajek, L. W. Rupp, J. V. Waszczak, R. J. Felder, T. O. Poehler, P. M. Chaikin, R. Lacoe

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Preparation and some properties of tetramethyldithiadiselenafulvalene (TMDTDSF) are described. It forms the expected (donor)2 X salts. Properties of the PF6- salt are described as well as properties of alloys of the title compound with tetramethyltetraselenafulvalene (TMTSF). (TMDTDSF)2PF6 is a relatively poor conductor even though it is isomorphous with the high-pressure superconductor (TMTSF) 2PF6. The profound difference in properties between these two solids is ascribed to disorder in the arrangement of sulfur and selenium atoms along the donor stacks in (TMDTDSF)2PF6. Alloying very small amounts of TMDTDSF into (TMTSF)2PF6 causes the metal-to-insulator transition temperature (TMI) to move up smoothly from 11 K for pure (TMTSF)2PF6 to ∼200 K for pure (TMDTDSF)2PF6 due to increasing disorder as TMDTDSF is incorporated.

    Original languageEnglish (US)
    Pages (from-to)1004-1012
    Number of pages9
    JournalThe Journal of Chemical Physics
    Volume79
    Issue number2
    DOIs
    StatePublished - 1983

    ASJC Scopus subject areas

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

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