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Supramolecular liquid crystalline complexes have been obtained from binary mixtures of 3‐(4‐pyridyl)‐5‐(4‐n‐alkoxy)phenyl‐1,2,4‐oxadiazoles with benzoic acid, 4‐chlorobenzoic acid or 4‐methylbenzoic acid. Neither the oxadiazole derivatives nor the carboxylic acids are mesomorphic, but the H‐bonded complexes are. Their liquid crystalline properties were investigated by differential scanning calorimetry, polarizing optical microscopy and X‐ray diffraction.
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Hidalgo et al. (2005) studied this question.
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