The inversion phenomenon of the helical twist sense in antiferroelectric liquid crystal phase from electronic and vibrational circular dichroism |
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| Authors: | M. Tykarska |
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| Affiliation: | Faculty of Advanced Technologies and Chemistry, Institute of Chemistry, Military University of Technology, Warsaw, Poland |
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| Abstract: | The investigation of the helical pitch and the helical twist sense for several liquid crystal compounds in antiferroelectric phase have been performed. Electronic circular dichroic (ECD) and vibrational circular dichroic (VCD) spectroscopies have proved the existence of unwound helical structure in antiferroelctric phase. Obtained results may confirm the assumption connected via the inversion phenomena in liquid crystalline chiral phase with the change of the concentration of different conformers promoting opposite handedness. Two examples of such conformers, obtained by conformational analysis, have been proposed. |
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| Keywords: | Liquids crystals antiferroelectric phase circular dichroism helical twist sense |
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