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Synthesis 1987; 1987(8): 703-705
DOI: 10.1055/s-1987-28050
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Syntheses of Liquid Crystalline Phthalocyanines

Michael Hanack* , Anton Beck, Helmut Lehmann
  • *Institut für Organische Chemie, Lehrstuhl für Organische Chemie II, Universität Tübingen, Auf der Morgenstelle 18, D-7400 Tübingen, West Germany
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Publication Date:
12 September 2002 (online)

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The syntheses of peripherally substituted metal phthalocyanines (C8H17OCH2)8PcM with M = Co, Ni and Pb are described. The macrocycle (C8H17OCH2)8PcCo is reacted with sodium cyanide under oxidative conditions to give the cyano-bridged compound [(C8H17OCH2)8PcCoCN]n. All of the substituted metal phthalocyanines show liquid crystalline properties with phase transitions between 53.8°C and 94°C. Their liquid-crystal properties were demonstrated by DSC measurements and by polarization microscopy.