[2]Benzothiophene bent-shaped liquid crystals |
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| Authors: | Anna Kovářová Vladimíra Novotná Milada Glogarová Miroslaw Salamonczyk Damian Pociecha |
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| Affiliation: | 1. Department of Organic Chemistry , Institute of Chemical Technology , Prague, Czech Republic;2. Institute of Physics, Academy of Science of the Czech Republic , Prague, Czech Republic;3. Laboratory of Dielectrics and Magnetics, Chemistry Department , Warsaw University , Warsaw, Poland |
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| Abstract: | New liquid crystalline (LC) compounds containing the [2 Weissflog, W., Nádasi, H., Dunemann, U., Pelzl, G., Diele, S., Eremin, A. and Kresse, H. 2001. J. Mater. Chem., 11: 2748–2758. [Crossref], [Web of Science ®] , [Google Scholar]]benzothiophene chromophore unit have been synthesised and their mesomorphic properties studied. Mesomorphic and fluorescent properties have been modified by various chemical moieties. Among others, terminal fluoroalkyl and/or chiral chains were introduced to stabilise mesophases and support the formation of polar phases. In spite of the bent shape due to the central 1,3-diphenylbenzo[c]thiophene unit, all compounds exhibit phases typical for the rod-like LC: nematic, smectic A and smectic C or their chiral analogues using the chiral (S)-C2H5CH(CH3)(CH2)6CO or (S)-C10H21OCH(CH3)CO chain. The orientational order in the nematic phase was studied by polarised infrared measurements. The fluorescent properties of the studied compounds have been measured and their parameters established. |
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| Keywords: | [2]benzothiophene liquid crystals mesomorphic properties fluorescence polarised infrared measurements |
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