Abstract
Abstract The mesomorphic behavior of octa (dodecyloxymethyl) phthalocyanine was studied with DSC, optical microscopy, and X-ray diffraction. Two discotic mesophases were observed as a function of temperature. Their structure corresponds to the piling up of the flat molecules in columns which are laterally assembled according to a two-dimensional hexagonal lattice (D = 31.2 A). The repeat distance of the molecules along the columns was found to be of about 4.5 A. The low-temperature discotic phase showed an extra sharp reflection at 20.5 A, indicating a further ordering of the molecules.
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