Mesogenic Behaviour of 2,3,9,10,16,17,23,24-Octadodecyloxycarbonyl- phthalocyaninatogermanium-dihydroxide

Abstract

The synthesis of 2,3,9,10,16,17,23,24-octadodecyloxycarbonylphthalocyaninatogermaniumdihydroxide is described. The mesomorphic properties of this new material were studied by differential scanning calorimetry (DSC), optical microscopy and X-ray investigations. The described compound shows a discotic mesophase in an extremely large temperature interval including room temperature. The X-ray diffraction pattern of the mesophase of 2,3,9,10,16,17,23,24-octadodecyloxycarbonylphthalocyaninato- germaniumdihydroxide proves that it forms a hexagonal columnar mesophase of the type D _hd .

Key Words:

• discotic liquid crystal
• phthalocyanine
• germanium complex