Energy of pair interaction of molecules for certain liquid crystals

Molecular mechanism of smectisation and regulation of polymorphism in nematic liquid crystal systems

“…Detailed analysis of UV and IR spectra, along with comparison to the results of EPR data [5][6][7][8]14], has allowed us to identify at least five types of particles (monomers and a few percent associates of donor and acceptor, CTC of 𝐷 𝐴 and 𝐷 2 𝐴 types) in NLC systems at a given temperature and pressure. With this approach, the thermodynamic potential 𝜙 characterizing the nematic→smectic phase transition will be a complex function of the steric parameters of the molecules, and of the number and type of particles in NLC system.…”

“…The creation of such charge transfer complexes is a powerful and flexible instrument for modifying the structures and properties compared to those of the initial components [1][2][3]. In [4][5][6][7][8] the study of the molecular structure of nematic liquid crystal (NLC) systems that are based on polar liquid crystals, whose molecules have a large dipole moment directed along the long axis of the molecule (such as 4-n-buthyl-4 ′ -n ′ -heptanoiloxyazoxybenzene; n-cyanophenyl ester of n ′ -heptylbenzoic acid) as well as the investigation of a specific intermolecular interaction -the formation of charge transfer complexing (CTC) in LC systems were carried out by EPR, UV and IR spectroscopy.…”