Spectral and orientational properties of new group of naphthalene derivatives of bicarboxylic acid in liquid crystal 7CB |
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| Authors: | N Bielejewska E Wolarz R Stolarski D Bauman |
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| Institution: | (1) Faculty of Technical Physics, Poznań University of Technology, 60-965 Poznań, Poland;(2) Institute of Polymer Technology and Dyes, Łódź University of Technology, 90-924 Łódź, Poland |
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| Abstract: | The spectral and orientational properties of some dichroic fluorescent dyes (naphthalene derivatives of bicarboxylic acid)
in some isotropic solvents and in an anisotropic matrix have been studied. The order parameter of the dyes in the nematogenic
liquid crystal 7CB has been determined from measurements of polarized electronic absorption and fluorescence. The influence
of the dye addition on the nematic-isotropic phase transition temperature of 7CB has been investigated. It was found that
some of the dyes studied could be successfully utilized in guest-host liquid crystal display devices. |
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| Keywords: | dichroic dye liquid crystal order parameter electronic absorption fluorescence |
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