2c05 有機金属錯体のディスコティック液晶(109) : m-アルコキシフェノキシ基を8つ置換したフタロシアニナート金属錯体のカラムナー液晶相のスタッキング距離に及ぼすd電子数のパリティ効果(物理・物性,口頭発表,2012年日本液晶学会討論会)

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We have synthesized thirty-four novel homologous discotic liquid crystals, octakis(m-alkoxyphenoxy)phthalocyaninato metal(II) {abbreviated as (m-C_nOPhO)_8PcM (M=Co, Ni, Cu, Zn and H_2; n=8, 10, 12, 14, 16, 18 and 20)}, and investigated parity effect of the number of d-electrons on the stacking distances in their columnar mesophases. It was revealed from temperature-dependent wide angle X-ray diffraction studies that each of the cobalt(II) (d^7) complexes and the copper(II) (d^9) complexes showed a single hexagonal ordered columnar (Col_<ho>) mesophase with a very short stacking distance at 3.3Å, and that the nickel(II) (d^8) complexes and the metal-free (d^0) derivatives showed a single pseudo-hexagonal ordered columnar (Col_<rho>) mesophase with a little bit longer stacking distances at 3.4Å. Furthermore, the zinc(II) (d^<10>) complexes showed two different rectangular ordered columnar mesophases, Col_<ro>(P2/m) and Col_<ro>(P2_1/a), with a little bit longer stacking distance at 3.4Å.
日本液晶学会の論文
2012-08-20