Abstract
Two series of hydroxybiphenyl benzoate 2a–2c and biphenyl bis(benzoate) 3a–3c have been synthesized by the esterification reaction of 4-alkoxybenzoic acid 1a–c with 1,1′-biphenyl-4,4′-diol in presence of DCC and DMAP in dichloromethane at room temperature under nitrogen atmosphere. Products ratio (2 vs 3) were not significantly influenced with the variation of alkoxy substituents. The newly synthesized ester products were characterized by IR and NMR spectroscopy as well as elemental analysis. The transition temperatures and mesophases have been investigated by differential scanning calorimetry and polarized optical microscopy. Although the synthesized ester derivatives, 3a–c are achiral, molecular chirality is exhibited in their mesophases.
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