Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of rigid networking agents in supramolecular systems

Hydrogen bonding and liquid crystallinity of low molar mass and polymeric mesogens containing benzoic acids: a variable temperature Fourier transform infrared spectroscopic study

“…[3] This concept was extended by Kato, Fr echet and colleagues to consider liquid crystalline systems formed via hydrogen bonding between unlike hydrogen bond donors and acceptors such as benzoic acid and pyridyl-based fragments, respectively (see, for example, [6][7][8][9][10]). This material design approach has been very widely adopted and remains an area of considerable research activity; recent examples of hydrogen-bonded systems have included both main chain [11][12][13] and side chain liquid crystal polymers (SCLCPs), [14,15] and new discotic systems. [16][17][18] Hydrogen bonding also plays a key role in driving liquid crystalline behaviour in a diverse range of other materials including commercially important high-performance fibres, [19] protonic conductors [20,21] and liquid crystal sugars.…”

Investigation of thermodynamic and surface characterisation of 4-[4-(2-ethylhexyloxy)benzoyloxy]benzoic acid thermotropic liquid crystal by inverse gas chromatography

“…The free energy of adsorption, ΔG A , for the n-alkanes and five polar solvents were calculated from Fowkes method using Equations (11) and (12) in the temperature range 308.2 and 333.2 K. A plot of RT ln V N versus aðγ D L Þ 0:5 for n-alkanes and polar solutes is drawn as an example for the data measured at 308.2 K in Figure 7. The fit was excellent in each case (R 2 ≥ 0.999).…”

“…Due to the striking influence of hydrogen bonding on physical properties and LC organisation, benzoic acid derivatives have attracted considerable research interest in the field of LCs. [7][8][9][10][11] The use of Inverse Gas Chromatography (IGC) for characterising structure and interactions in nonvolatile materials was pioneered by Guillet and coworkers in the late 1960s and early 1970s. [12] In recent years, IGC has been used to investigate interactions between LC and solvent [13][14][15][16] due to the fact that it is a highly useful new method providing new insights for the physico-chemical characterisation of LCs.…”