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首页> 外文期刊>RSC Advances >Pressure-induced ionic liquid crystal in 1-dodecyl-3-methylimidazolium tetrafluoroborate
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Pressure-induced ionic liquid crystal in 1-dodecyl-3-methylimidazolium tetrafluoroborate

机译：1-十二烷基-3-甲基咪唑四氟硼酸盐中的压力诱导离子液晶

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The phase behaviors of 1-dodecyl-3-methylimidazolium tetrafluoroborate ([C12MIM][BF4]) had been investigated by means of Raman spectroscopy and polarized optical microscopy under pressure values up to 2.0 GPa at the temperature of 80.0 °C. Upon compression, change in the ratio of peak heights of symmetric and asymmetric CH2 stretching modes of Raman spectra in [C12MIM][BF4] (r(CH2)ss/(CH2)as) indicated that it might experience two successive phase transitions. The structure evolution of the sample, which was investigated through the image analysis from polarized optical microscopy, was found to share many of the known quantitative properties of the smectic A phase of [C12MIM][BF4]. These facts were suggestive of ionic liquid crystal induced by compression in [C12MIM][BF4] under the pressure between 0.25 GPa to 0.60 GPa, which was similar to ionic liquid crystal upon cooling from its melt.
机译：1-十二烷基-3-甲基咪唑四氟硼酸酯（[C 12 MIM] [BF 4 ]的相行为）已通过拉曼光谱和偏振光学显微镜在80.0°C的温度下在高达2.0 GPa的压力下进行了研究。压缩后，[C 12 的对称和不对称CH 2 拉曼光谱的拉伸模式的峰高比的变化/ small> MIM] [BF 4 ]（ r （CH 2 ）ss /（CH 2 as ）表示它可能经历两个连续的相变。通过偏振光学显微镜的图像分析研究了样品的结构演变，发现该样品具有[C 12 的近晶A相的许多已知定量性质。 small> MIM] [BF 4 ]。这些事实暗示了在[C 12 MIM] [BF 4 ]中受压诱导的离子液晶压力介于0.25 GPa到0.60 GPa之间，类似于从熔融态冷却下来的离子液晶。

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