Sulfur as a Structural Element in Calamitic Liquid Crystals. 2 Terminal, Linking, Axial and Lateral Substitutions. 3 Sulfur-Containing Rings

Abstract

The effect on the physico-chemical properties of introducing the sulfur atom into the molecular structure of liquid crystals is discussed and rationalized in terms of existent theories; a comparison is made with the corresponding hydrocarbon and oxygen derivatives.

Mirror Symmetry Breaking and Network Formation in Achiral Polycatenars with Thioether Tail

“…[77,78] Increased conformational chain disorder of arylthioethers is also supported by the decreased conjugation of S with the benzene ring if compared with related arylethers. [79] Moreover, the reduced electronegativity of S compared to O leads to reduced dipolar intermolecular interactions whereas its larger electric polarizability provides stronger dispersion forces between the thioethers. In cases where the conformation is biased, as in heterocycles, a strong mesophase stabilizing effect of S compared to O of about 20 K per S was observed.…”