期刊
LIQUID CRYSTALS
卷 33, 期 4, 页码 399-407出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290600633485
关键词
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Bent-core, polycatenar pyridines are reported, synthesized via a Siegrist coupling of di- and tri-alkoxybenzylidene fragments with 2,6-dimethylpyridine. None of these pyridines was liquid crystalline. Isomeric materials based on a 3,5-disubstituted pyridine core were mesomorphic in hydrogen-bonded complexes, whereas these new materials were not. However, the new pyridines did form mesomorphic metal complexes with silver salts. Some insight into this behaviour is gleaned from single crystal structure determinations of the model systems, 3,5-bis(3',4'-dimethoxystyryl) pyridine and 2,6-bis(3',4'-dimethoxystyryl) pyridine.
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