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Observation of intercalated smectic phases in symmetric liquid crystal dimers containing hydrazide groups
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作者: Wang HT, Bai BL, Zhang P, Long BH, Tian WJ, Li M
来源出版物: LIQUID CRYSTALS    卷: 33    期: 4    页: 445-450    出版年: APR 2006
摘要: Dimeric hydrazide derivatives with nitro, phenyl, and methyl terminal subsistents were synthesized. The liquid crystalline properties were investigated by differential scanning calorimetry, polarizing optical microscopy and wide angle X-ray diffraction. Interestingly, intercalated smectic phases were observed in these symmetric liquid crystal dimers. The effect of the substituents and the length of the spacer on the mesophase is discussed, confirming that intermolecular hydrogen bonding between the hydrazide groups was the driving force for the formation of the intercalated structures.