Discotic liquid crystals of transition metal complexes 44: synthesis of hexaphenoxy-substituted phthalocyanine derivatives showing spontaneous perfect homeotropic alignment

作者：Ariyoshi Masaaki; Sugibayashi Kajita Makiko; Suzuki Ichihara Ayumi; Kato Takayuki; Kamei Tenpei; Itoh Eiji; Ohta Kazuchika^*

来源：Journal of Porphyrins and Phthalocyanines, 2012, 16(10): 1114-1123.

DOI：10.1142/S1088424612500976

• discotic liquid crystal
• phthalocyanine
• tetragonal columnar mesophase
• homeotropic alignment

We have synthesized novel hexaphenoxy-substituted phthalocyanine derivatives, 2-(12-hydroxydodecyloxy)-3-methoxy-9,10,16,17,23,24-hexakis(3,4-di-n-alkoxyphenoxy)phthalo-cyaninato copper(II) (abbreviated as C-n(OC12OH)PcCu: n = 10, 12, 14), and investigated their columnar mesomorphism and homeotropic alignment property. These hexaphenoxy-substituted Pc derivatives could be successfully isolated and purified from the mixture products by polarity difference. It was revealed by using polarizing optical microscopic observations, differential scanning calorimetry and temperature-dependent X-ray diffraction studies that each of the hexaphenoxy-substituted Pc derivatives has plural mesophases, and that the tetragonal columnar (Col(tet)) mesophase shows spontaneous perfect homeotropic alignment between two non-surface-treated glass plates without any defects and polydomain boundaries.

• 出版日期2012-10