1D04 二次元高分子金属錯体を自発形成する新しいイオン性金属錯体液晶の特異的な液晶挙動と光物性

概要

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Liquid-crystalline behavior and optical property of novel ionic metallomesogens, which are organic cations containing metal complex ions as a counteranion, were evaluated by differential scanning calorimetry, polarizing optical microscopy, X-ray diffractometry, absorption spectroscopy and Raman spectroscopy. The ammonium complex salts showed a stable liquid-crystalline phase in comparison with the parent compounds. In an ionic layer within the multilamellar self-assembly organized by the ammonium complexes, it was found that two-dimensional polymeric metal complex with Perovskite-type structure is formed spontaneously. Furthermore, the bis(ammonium) tetrachlorometalate of cobalt, zinc and cadmium exhibited S_A-S_A phase transition. Such unusual transition behavior was assumed to originate from the geometrical change in the metal complexes in the ionic layer plane. In addition, the cobalt-containing compounds showed thermochromism and solvatochromism in solution.
日本液晶学会の論文
1998-10-12