Spin Crossover between the High-Spin and Low-Spin States and Dielectric Switching in the Ionic Crystals of a Fe(II) [2 × 2] Molecular Grid

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  • Yuta Uezu
    Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512 , Japan
  • Ryo Tsunashima
    Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512 , Japan
  • Chiaki Tanaka
    Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512 , Japan
  • Masaru Fujibayashi
    Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512 , Japan
  • Jun Manabe
    Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 , Japan
  • Sadafumi Nishihara
    Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 , Japan
  • Katsuya Inoue
    Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 , Japan

Abstract

<jats:title>Abstract</jats:title> <jats:p>We synthesized an Fe(II) [2 × 2] molecular grid with pyridyl-substituted bis-terdentate ligands. The molecular grid showed abrupt spin crossover between fully high-spin and fully low-spin states in a narrow temperature width of ∼10 K. The spin crossover event also included a first-order structural phase transition, in which the dielectric constant jumped atypically toward a low-spin state.</jats:p>

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