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Novel supramolecular columnar liquid crystals based on thiosemicarbazides

AuthorsElgueta, Elizabeth Y.; Parra, M. L.; Barberá, Joaquín
Issue Date2011
PublisherTaylor & Francis
CitationSupramolecular Chemistry 23(11): 721-730 (2011)
AbstractNovel liquid crystal materials based on 3,4-di-n- alkoxybenzoylthiosemicarbazides (3a-h, n=5-10, 12, 14) were synthesised. The mesomorphic properties of these compounds were characterised and studied by differential scanning calorimetry, polarising optical microscopy and X-ray diffraction. Compound 3a did not show mesomorphic properties; 3b shows a monotropic hexagonal columnar (Col h) phase. Compounds 3c-h display an enantiotropic Col h phase. The mesomorphic properties were found to be dependent on the length of alkoxy side chains. In N,N-dimethylformamide solution, all the compounds displayed a room temperature emission with λ max at 361-332nm. A thermogravimetric analysis also was performed. Copyright © 2011 Taylor and Francis Group, LLC.
Identifiersdoi: 10.1080/10610278.2011.622390
issn: 1061-0278
e-issn: 1029-0478
Appears in Collections:(ICMA) Artículos
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