TEMPERATURE-DEPENDENT FTIR STUDY ON SELF-ASSEMBLY CHIRAL LIQUID-CRYSTALS THROUGH INTERMOLECULAR HYDROGEN-BONDING

In this paper, two new self-assembly chiral liquid crystals which inte ract through intermolecular hydrogen bonding between 4-[(S)-2-chloro-3 -methyl] butanoyloxy-4'-stilbazole and 4-alkoxy-benzoic acids (nBA, n = 5,6) were investigated at different temperatures by using temperatur e-dependent Fourier transform infrared spectra. The results show that the ester carbonyl groups are very sensitive to the crystal-liquid cry stal transitions, and the results also show that the intermolecular hy drogen bonding is stable in the crystal and liquid-crystal states, but decreases greatly when temperatures are higher than their clearing po ints.