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

11 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
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

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