Influence of molecular structure peculiarities of phthalocyanine derivatives on their supramolecular organization and properties in the bulk and thin films

Abstract

In order to study the influence of molecular structure peculiarities on supramolecular organization and properties in the bulk and thin films of discotic mesogens six new mix-substituted phthalocyanine derivatives with 3,6-dioctyloxyphthalonitrile and 3,4,5,6-tetrachlorophthalonitrile fragments were synthesized. Temperatures of phase transitions, types of mesophase and their dependence on molecule structure, chemical nature, position and ratio of different substituents as well as presence of holmium in the metal complexes were analyzed. The behavior of the studied molecules on the boundary between water and air was investigated and the peculiarity of supramolecular organization in floating layers as well as in thin films was determined. Quenching of luminescence in solutions of the studied compounds in the presence of fullerene C₆₀ was determined, thus giving prospects for application of these compounds as sensors for fullerene microquantities.

Keywords:

• phthalocyanines
• phase transitions
• mesogens
• thin films

Acknowledgments

The authors are thankful to Prof. Dr Lev Blinov (Shubnikov Institute of Crystallography of the Russian Academy of Science, Moscow, Russia) for the support in spectral investigations.

Additional information

Funding

The work was supported by the program of the Ministry of Education and Science of the Russian Federation for Ivanovo State University to perform research work during 2014–2016 and Russian Foundation for Basic Research [grant number 13-03-00481a].