The B2-B7 phase transition in symmetrical bent-shaped mesogens with methoxy substitution |
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| Authors: | Vladimí ra Novotn V ra Hamplov Miroslav Ka&#x par Milada Glogarov Karel Kní ek Siegmar Diele Gerhard Pelzl Chris Jones David Coleman Noel A Clark |
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| Institution: | Vladimí,ra Novotná, ,Vě,ra Hamplová,,Miroslav Kaš,par,Milada Glogarová,,Karel Kní,ž,ek,Siegmar Diele,Gerhard Pelzl,Chris Jones,David Coleman,Noel A. Clark |
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| Abstract: | New mesogens composed of achiral bent molecules with thermally stable ester linkages, and laterally substituted by a methoxy group symmetrically near the central benzene ring, were synthesized. Texture, calorimetric, electro-optical, X-ray and dielectric measurements were performed. In most of studied compounds the antiferroelectric B2 phase was found on cooling from the isotropic phase, followed by the B7 phase at lower temperatures. Undulation of layers in the B7 phase was confirmed by precise synchrotron studies. |
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