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Updated: May 3, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Synergistic spin transition between spin crossover and spin-Peierls-like singlet formation in the halogen-bonded
Kappei Fukuroi1, Kazuyuki Takahashi, Tomoyuki Mochida
1Department of Chemistry, Kobe University, 1-1 Rokkodai, Kobe 657-8501 (Japan).
Abstract:
To introduce halogen-bond interactions between a cation and an anion, a novel Fe(III) complex from iodine-substituted ligands involving a paramagnetic nickel dithiolene anion was prepared and characterized. The compound exhibited the synergy between a spin-crossover transition and a spin-Peierls-like singlet formation. The halogen-bond interactions between the iodine and the sulfur atoms stabilized the paramagnetic state of π-spins and played a crucial role in the synergistic magnetic transition between d- and π-spins. In addition, the compound showed the light-induced excited spin state trapping effect.
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