イミダゾリウム系イオン液体の高圧相転移挙動

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  • High Pressure Phase Transition Behavior of Imidazolium-based Ionic Liquids
  • イミダゾリウムケイ イオン エキタイ ノ コウアツソウ テンイ キョドウ

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High pressure (HP) phase transition behavior of 1-alkyl-3-methylimidazolium-based ionic liquids ([Cnmim]-ILs) studied using optical spectroscopy was reviewed. On the whole, [Cnmim]-ILs under high pressure showed at least three transition patterns; (i) HP-glassy state, (ii) compression crystallization, and (iii) decompression crystallization. The glass transition pressure (pg) and compression or decompression crystallization pressure (pc or pd.c) throughout the reported [Cnmim]-ILs were observed in the pressure range from 1.0 to 3.0 GPa for pg, below 1.0 GPa for pc, and below 2.0 GPa for pd.c, respectively. We discussed the selectivity between the HP-glassy state and compression crystallization of [Cnmim]-ILs.<br>

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