Lamellar Tetragonal Symmetry of Amphiphilic Thermotropic Ionic Liquid Crystals in the Framework of Other Closely Related Highly Ordered Structures

Symmetry

Michael Arkas¹  Marilina Douloudi¹  Theodora Katsika¹  Michail Vardavoulias² 

[1] Demokritos National Centre for Scientific Research, Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece;PYROGENESIS S.A., Technological Park 1, Athinon Avenue, 19500 Lavrion, Greece;

关键词: smectic T;    lamellar;    tetragonal symmetry;    liquid crystals;    square lattice;    lattice parameter;   

DOI  :  10.3390/sym14020394

来源: DOAJ

【 摘 要 】

An overview of the chemical compounds forming the rare smectic T phases is presented with references to the historical context. Thermodynamics (transition temperatures, enthalpies) along with the factors (stereochemical constraints, electrostatic interactions, aliphatic chain stacking, intermolecular forces) contributing to the adoption of tetragonal scaffolds are also discussed. Characteristic optical microscopy textures and X-ray diffraction patterns are presented. In parallel, a comparison of the geometrical parameters such as distances between atoms, molecular areas, volumes, and lattice parameters with the closest two-dimensional and three-dimensional organizations, is performed.

【 授权许可】

Unknown