Abstract
A rod-like Au(I) complex, which has a naphthalene ring in a mesogenic core, was synthesized by complexation of an ethynyl-substituted naphthalene derivative with (tht)AuCl, followed by treatment with 1-pentyl isocyanide. Characterization by NMR and X-ray crystallographic analysis revealed its molecular structure and crystal packing structure. The Au complex was found to exhibit enantiotropic liquid crystallinity. The temperature range in which a liquid–crystalline (LC) phase existed was wider than those for the corresponding LC gold complexes with phenyl or biphenyl moieties reported so far. For the Au complex in this study, photoluminescence was observed at 505 nm in the crystalline phase. In this paper, the relationship between molecular structure and LC behavior or photophysical properties is described by comparing this complex with other rod-like Au complexes.
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