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English2H NMR spectroscopy is employed to investigate the orientational order, molecular structure and phase transitions of the chiral smectic liquid crystal (S)-[4-(2- methylbutyl)phenyl]-4′-octylbiphenyl carboxylate (8BEF5), partially deuterated in both the chiral chain and the phenyl moiety. 8BEF5 shows a rich polymorphism; the following phases have been observed: Blue phase, N* SmA, SmC*, SmI*, SmF*, SmJ* and SmG* phases. The tilt angle and the orientational order of the phenyl fragment has been investigated throughout the mesophasic range; the additive potential method has been applied in the SmA phase in order to obtain the order parameter of the "average" conformer of the whole molecule.
| Autori interni: | |
| Autori: | Catalano, DONATA INES MARIA; Chiezzi, L.; Domenici, Valentina; Geppi, Marco; Veracini, CARLO ALBERTO; Dong, R. Y.; Fodorcsorba, K. |
| Titolo: | 2H NMR spectroscopy of liquid crystals: structure and orientational order of a chiral smectogen as a model compound of side-group LC polymers |
| Anno del prodotto: | 2002 |
| Digital Object Identifier (DOI): | 10.1002/1521-3935(200207)203:10/11<1594::AID-MACP1594>3.0.CO;2-P |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11568/177862
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