Charged Nitronyl Nitroxide Biradicals as Building Blocks for Molecular Ferrimagnetics

Daisuke Shiomi, Kazuhiko Ito, Masahiro Nishizawa, Syuichiro Hase, Kazunobu Sato, Takeji Takui, Koichi Itoh

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    A crystal-engineering approach to organic ferrimagnetics is reported. Coulombic energy between cationic biradical with S=1 and anionic radical with S=1/2 is a promising driving force of co-crystallizing the hetero-molecular assemblage in a controllable manner. As a cationic component of "organic salt ferrimagnetics", two kinds of nitronyl nitroxide biradicals, 2,6- and 3,5-substituted pyridine derivatives, were examined. It was predicted from semi-empirical molecular orbital calculations that both the 2,6- and 3,5-derivatives have the triplet ground states both in the neutral and cationic states. The molecular ground state of the 2,6-biradical in the neutral state was found to be triplet from magnetic susceptibility measurements, while the susceptibility and ESR measurements suggested a singlet ground state for the 3,5-biradical.

    Original languageEnglish
    Pages (from-to)99-108
    Number of pages10
    JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
    Volume334
    DOIs
    Publication statusPublished - 1999 Jan 1

    Keywords

    • Crystal engineering
    • Nitronyl nitroxide
    • Organic ferrimagnet
    • Organic salt
    • Pyridinium cation

    ASJC Scopus subject areas

    • Condensed Matter Physics

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