期刊
LIQUID CRYSTALS
卷 31, 期 7, 页码 923-933出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290410001704982
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Two new homologous series of bent-core compounds have been synthesized. Their mesophase behaviour has been investigated by polarizing microscopy, differential scanning calorimetry, X-ray diffraction, NMR spectroscopy, and by dielectric and electro-optical measurements. It was found that, with one exception, all the chlorine-substituted compounds form a nematic phase and an optically isotropic 'banana phase'. The latter phase shows spontaneously chiral domains of opposite handedness. This phase may be considered as a type of smectic blue phase. The mesophase behaviour of the homologous bromine-substituted compounds is more complicated. Depending on the chain length, B-6, columnar, nematic or the isotropic 'banana phase' occur.
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