Liquid crystalline alkylthia-substituted novel phthalocyanines: synthesis and characterization

Author:

Erdoğan Buket S.1,Atilla Devrim1,Gürek Ayşe G.1,Ahsen Vefa12

Affiliation:

1. Gebze Institute of Technology, Department of Chemistry, PO Box 141, Gebze-Kocaeli 41400, Turkey

2. TUBİTAK-Marmara Research Center, Materials Institute, Gebze-Kocaeli 41470, Turkey

Abstract

Methylene-bridged tetra- and octa-alkylthia substituted metal free- and Ni ( II ) phthalocyanines were synthesized from the corresponding phthalonitrile derivatives in the presence of the anhydrous metal salt ( NiCl 2) or a strong organic base. The new compounds were fully characterized by elemental analyses, UV-vis, IR, NMR and mass spectra. The mesogenic properties of these materials were studied by differential scanning calorimetry, optical microscopy and X-ray diffraction investigations. X-ray diffraction patterns of the mesophase confirmed that the tetra- and the octa-substituted compounds formed hexagonal columnar mesophases (Colh). The mesogenic properties of these compounds were compared to that of their octa alkythia substituted phthalocyanine derivatives in the literature.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Chemistry

Reference22 articles.

1. J. Simon and P. Bassoul, Phthalocyanine Based Liquid Crystals: Towards Submicronic Devices. In Phthalocyanines: Properties and Applications 2, eds. C. C. Leznoff and A. B. P. Lever (VCH, Weinheim, 1993) pp. 223–305.

2. Annelides. 7. Discotic mesophases obtained from substituted metallophthalocyanines. Toward liquid crystalline one-dimensional conductors

3. J. Barbera, Metallomesogens 4, ed. J. L. Serrano (VCH, Weinheim, 1996) p. 164.

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