Synthesis and characterization of new liquid-crystalline dyes for non-linear optics |
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| Authors: | T. Hanemann E. A. Soto Bustamante T. Weyrauch W. Haase |
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| Affiliation: | Institut für Physikalische Chemie, Technische Hochschule , Petersenstr. 20, D-6100 , Darmstadt , Germany |
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| Abstract: | Abstract We present the synthesis and a description of the physical properties of several organic dyes containing stilbene as well as azomethine groups. The preparations of all compounds started from a common precursor, 4-amino-4′-nitrostilbene, followed by condensation with aromatic aldehydes. The mesomorphic properties and spectroscopic data were established using polarizing microscopy, DSC measurements, X-ray and UV/Vis spectroscopy. Three of the compounds showed enantiotropic smectic phases, two of them highly ordered SE and SB phases, and a nematic phase. In addition quantum chemical calculations concerning the electronic properties were carried out. |
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