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X-ray crystallographic analysis has been used to determine the structure of the nematic liquid crystal, 4,4’-dimethoxy-2,2’-dihydroxybenzalazine (1). Benzalazine (1) is centrosymmetric, with two benzene rings that are almost coplanar with the azine bridge. Two intramolecular hydrogen bonds are observed between the OH group and nitrogen atom of the azine bridge, while two intermolecular interactions are observed for CH… π and CH… O. Benzalazine (1) produced emission bands at 506 and 537 nm in the solid state when excited at 430 nm.
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Takahashi et al. (2006) studied this question.
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