SYNTHESIS AND CHARACTERIZATION OF NEW LIQUID-CRYSTALLINE DYES FOR NONLINEAR OPTICSReport as inadecuate




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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.Nota general

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Author: Hanemann, Thomas; - Soto Bustamante, Eduardo; - Weyrauch, T.; - Haase, W.; -

Source: http://repositorio.uchile.cl/



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