Discotic liquid crystals of transition metal complexes X. Phthalocyanine derivatives substituted with n-alkyloxyphenyl side chains

Kazuchika Ohta Department of Functional Polymer Science, Faculty of Textile Science and Technology, Ueda, 386, Japan

Takuya Watanabe Department of Functional Polymer Science, Faculty of Textile Science and Technology, Ueda, 386, Japan

Satoshi Tanak Department of Functional Polymer Science, Faculty of Textile Science and Technology, Ueda, 386, Japan

Testsuya Fujimoto Department of Functional Polymer Science, Faculty of Textile Science and Technology, Ueda, 386, Japan

Iwao Yamamoto Department of Functional Polymer Science, Faculty of Textile Science and Technology, Ueda, 386, Japan

Pierre Bassoul Laboratoire de Chimie et Electrochimie des Matériaux Moléculaires, 10 rue Vauquelin, 75231, Paris, Cedex, France

Nathalie Kucharczyk Laboratoire de Chimie et Electrochimie des Matériaux Moléculaires, 10 rue Vauquelin, 75231, Paris, Cedex, France

Jacques Simon Laboratoire de Chimie et Electrochimie des Matériaux Moléculaires, 10 rue Vauquelin, 75231, Paris, Cedex, France

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Abstract

Octakis(alkyloxyphenyl)-phthalocyanine derivatives ((C_nOph)₈PcH₂ n = 8, 10 12 and 18), their corresponding copper (II) complexes ((C_nOph)₈PcCu, n = 10, 12 and 18) and octakis(2-ethylhexyl)-PcH₂ have been synthesized and their mesomorphic properties characterized. (C_nOph)₈PcH₂, (n = 12 and 18) exhibit hexagona disordered columnar mesophases whereas (C_nOph)₈PcCu (n = 12 and 18) yields a rectangular disordered columnar liquid crystal. An alkylphenyl-oxymethyl derivative, (C₁₂phOCH₂)₈PcH₂, was synthesized to determine the influence of the connecting link between the side chains and the phthalocyanine macrocycle on the mesomorphic properties.

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Discotic liquid crystals of transition metal complexes X. Phthalocyanine derivatives substituted with n-alkyloxyphenyl side chains

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