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- W1969787420 endingPage "1704" @default.
- W1969787420 startingPage "1704" @default.
- W1969787420 abstract "Bent-core mesogens derived from 4-cyanoresorcinol with terminal alkyl chains have been synthesized and investigated by polarizing microscopy, XRD and electro-optical methods. Short chain compounds have exclusively nematic phases which can be cooled to ambient temperature. These nematic phases are similar to ordinary nematic phases with only nearest neighbour correlation (N) whereas long chain compounds form SmC-type cybotactic clusters and these cybotactic nematic phases (NcybC) can be regarded as strongly fragmented SmC phases. The chain length dependent as well as temperature dependent structural transition from N to NcybC is continuous and associated with a change of the position and intensity of the small angle scattering in the XRD patterns. Moreover, a temperature dependent stepwise transition from cybotactic nematic phases to different types of non-polar and tilted smectic phases (SmC(I) and SmC(II)) is observed with a mesophase composed of elongated, but not yet fused cybotactic clusters (CybC) as an intermediate state of this transition. This improves the understanding of the nature and special properties of the nematic phases formed by bent-core molecules as well as their transition to smectic phases and it paves the way to new materials with spontaneous or field-induced biaxial nematic phases at ambient temperatures." @default.
- W1969787420 created "2016-06-24" @default.
- W1969787420 creator A5018290877 @default.
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- W1969787420 creator A5041388816 @default.
- W1969787420 creator A5043055104 @default.
- W1969787420 creator A5064751575 @default.
- W1969787420 date "2010-01-01" @default.
- W1969787420 modified "2023-09-25" @default.
- W1969787420 title "Nematic phases of bent-core mesogens" @default.
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