Nagao Kaneko

Surface‐induced molecular orientation of liquid crystals by carboxylatochromium complexes

Tetrachloro–μ‐hydroxo–μ‐carboxylatodichromium (III) complexes have been used to induce homeotropic alignment of nematic, smectic, and large‐pitch cholesteric liquid crystals. A dynamic scattering degradation test has shown that this orientation is remarkably stable.

Surface‐produced parallel alignment of nematic liquid crystals by polynuclear dicarboxylatochromium complexes

Dicarboxylatochromium complexes have produced very stable parallel molecular alignment of nematic liquid crystals, in contrast with a recently described perpendicular orientation by monocarboxylatochromium complexes. The complexes used are μ‐dicarboxylato‐bis (tetranitro‐μ‐hydroxodichromium (III))’s which bond chemically to substrate surfaces.