Synthesis and liquid-crystalline behaviour of thia-bridged tetra- and octa-substituted phthalocyanine derivatives

A. G. Guerek; M. Durmus; V. Ahsen

doi:10.1117/12.472122

27 June 2002 Synthesis and liquid-crystalline behaviour of thia-bridged tetra- and octa-substituted phthalocyanine derivatives

A. G. Guerek, M. Durmus, V. Ahsen

Author Affiliations +

Proceedings Volume 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications; (2002) https://doi.org/10.1117/12.472122
Event: XIV Conference on Liquid Crystals, Chemistry, Physics, and Applications, 2001, Zakopane, Poland

Abstract

Thia-bridged tetra- and octa-poly(oxyethylene)-substituted metal free- and Ni(II) phthalocyanines have been synthesized from the corresponding phthalonitrile derivatives in the presence of the anhydrous metal salt (NiCl₂) or a strong organic base. The new compounds have been characterized by elemental analyses, UV/vis, IR, NMR and mass spectra. The mesogenic properties of these new materials were studied by differential scanning calorimetry (DSC), optical microscopy and X-ray investigations. Although octa-substituted phthalocyanine derivatives are liquid all tetra-substituted compounds show a discotic mesophase in an extremely large temperature interval including room temperature. The relationship between the structure of the mesogenic units and the mesogenic behavior is discussed and the influence of the presence of the different heteroatoms in the side chains on mesomorphic properties has been determined.

Citation Download Citation

A. G. Guerek, M. Durmus, and V. Ahsen "Synthesis and liquid-crystalline behaviour of thia-bridged tetra- and octa-substituted phthalocyanine derivatives", Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); https://doi.org/10.1117/12.472122

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available