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- W2060959497 abstract "4-(2-Perfluorohexyl)-ethoxy-4′-cyanobiphenyl (F6H2OCB) and 4-(2-perfluorooctyl)-ethoxy-4′-cyanobiphenyl (F8H2OCB) were synthesised by Mitsunobu reaction. Liquid crystalline state of F6H2OCB and F8H2OCB was studied by differential scanning calorimetry (DSC) and microscopic observation. Broken fan-shaped texture, which is the characteristic of smectic C phase, was observed between 89.4°C and 162.0°C for F6H2OCB and between 103.7°C and 182.1°C for F8H2OCB. Such a stable smectic C liquid crystal (LC) is rarely reported. Smectic C LC can be transformed to ferroelectric smectic C* by the addition of a chiral compound. Smectic K phase was observed at room temperature for both F6H2OCB and F8H2OCB, and perfluoroalkyl chains were located up and down alternatively. Smectic K phase was proved by the comparison of d (interlayer distance) and L (calculated dimer molecular length) and the non-monotonic and slow decay of the intensities of 00l reflections in X-ray diffraction (XRD)." @default.
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- W2060959497 date "2013-04-01" @default.
- W2060959497 modified "2023-09-25" @default.
- W2060959497 title "Synthesis and structural studies of smectic C mesogens with terminal perfluoroalkyl chains" @default.
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- W2060959497 doi "https://doi.org/10.1080/02678292.2012.761356" @default.
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