Synthesis and mesomorphic properties of new fluorinated hydrogen-bonded supramolecular liquid crystals

Preparation and Mesomorphic Characterization of Supramolecular Hydrogen-Bonded Dimer Liquid Crystals

“…The shift was due to the breaking of hydrogen bonding between carboxylic acids and formations of stronger hydrogen bonding between H in carboxylic acid and N in pyridine. These results indicated the complexation by hydrogen bonding, as analogous results have been frequently found in studies on hydrogen bonding of polymers and complex liquid crystals (7,(17)(18)(19).…”

“…Most of the solvent was first evaporated slowly at 60 • C under atmospheric pressure. The remainder of the solution was then dried under vacuum at 80 • C for several days (7,17).…”

“…In recent years, it has been recognized that molecular recognition processes between different molecules through non-covalent interactions are advantageous for the design of functional molecular aggregates as liquid crystals and crystalline materials (5)(6)(7). Hydrogen bonds play an important role in building super-structures in chemical and biological systems because of their specificity and directionality (8).…”

Recent synthetic advances in pyridine-based thermotropic mesogens

“…Liu et al 12 synthesized two proton acceptor molecules bearing Schiff base linkages, i.e. N-(pyridin-4-ylmethylene)-4-(2,2,2-triuoroethoxy)benzenamine…”

Synthesis and characterization of hydrogen bonded liquid crystalline block copolymers based on a Schiff base moiety

“…The formation of H-bonds in these polymers plays a key role in biological processes and is an intermolecular interaction in crystal packing [16,17]. Recently, increasing research has focused on materials in which the core is assembled via non-covalent bonding [18,19]. There are only a few literature surveys describing H-bonded block copolymers.…”