Liquid crystalline alkylthia-substituted novel phthalocyanines: synthesis and characterization

Autor:	Buket S. Erdoğan, Devrim Atilla, Ayşe G. Gürek, Vefa Ahsen
Rok vydání:	2014
Předmět:	Organic base biology Mesogen Mesophase General Chemistry biology.organism_classification Photochemistry Phthalonitrile Crystallography chemistry.chemical_compound Differential scanning calorimetry chemistry Liquid crystal Phthalocyanine Tetra
Zdroj:	Journal of Porphyrins and Phthalocyanines. 18:139-148
ISSN:	1099-1409 1088-4246
DOI:	10.1142/s1088424613501149
Popis:	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.
Databáze:	OpenAIRE
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