Transformation between Monovalent and Divalent Ionic Solids: An Ionic(I)–Ionic(II) Phase Transition in a Biferrocene–F1TCNQ Charge-Transfer Complex

Tomoyuki Mochida; Kousuke Takazawa; Masashi Takahashi; Masuo Takeda; Yutaka Nishio; Michiko Sato; Koji Kajita; Hatsumi Mori; Michio M. Matsushita; Tadashi Sugawara

doi:10.1143/jpsj.74.2214

Transformation between Monovalent and Divalent Ionic Solids: An Ionic(I)–Ionic(II) Phase Transition in a Biferrocene–F₁TCNQ Charge-Transfer Complex

Tomoyuki Mochida, Kousuke Takazawa, Masashi Takahashi, Masuo Takeda, Yutaka Nishio, Michiko Sato, Koji Kajita, Hatsumi Mori, Michio M. Matsushita, Tadashi Sugawara

Author information

Tomoyuki Mochida
Department of Chemistry, Faculty of Science, Toho University
Kousuke Takazawa
Department of Chemistry, Faculty of Science, Toho University
Masashi Takahashi
Department of Chemistry, Faculty of Science, Toho University
Masuo Takeda
Department of Chemistry, Faculty of Science, Toho University
Yutaka Nishio
Department of Physics, Faculty of Science, Toho University
Michiko Sato
Department of Physics, Faculty of Science, Toho University
Koji Kajita
Department of Physics, Faculty of Science, Toho University
Hatsumi Mori
Institute for Solid State Physics, The University of Tokyo
Michio M. Matsushita
Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo
Tadashi Sugawara
Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo

Keywords: biferrocene, F₁-TCNQ, charge-transfer complex, phase transition, valence transition

JOURNAL RESTRICTED ACCESS

2005 Volume 74 Issue 8 Pages 2214-2216

DOI https://doi.org/10.1143/jpsj.74.2214

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Abstract

An “ionic(I)–ionic(II)” charge-transfer transition has been observed in a new molecular solid composed of dineopentylbiferrocene (D) and fluorotetracyanoquinodimethane (A). The material is a monovalent solid (D⁺A₃⁻) at room temperature and changes to a divalent solid (D²⁺A₃²⁻) at low temperatures, in association with a broad first-order phase transition at around 120 K.

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