書誌事項
- タイトル別名
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- Pressure Effect on the Conformational Equilibrium of Imidazolium-Based Ionic Liquids
- イミダゾリウムケイ イオン エキタイ ノ コンフォメーション ヘイコウ ニ オヨボス アツリョク コウカ ニ カンスル ケンキュウ
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Pressure effect on the conformational equilibrium of 1-butyl-3-methylimidazolium cation ([bmim]+) in the [bmim]-based ionic liquids (ILs) with three different anionic species (I, BF4, and PF6) have been studied using Raman spectroscopy. The gauche conformer for the NCCC angle of [bmim]+ increases with increasing pressure at all cases, and the trans conformer decreases. From the pressure dependence of the Raman intensity, we determined the difference in the partial molar volume (ΔVtrans→gauche) between the conformers of [bmim][X](X= I, BF4, and PF6). The negative ΔVtrans→gauche is due to the molecular volume difference (ΔVM) which consists of the van der Waals volume and void volume differences. This means that the pressure-induced [bmim]+ conformational preference of [bmim]-based ILs is dependent of the configuration of [bmim]+ against each anionic species. Thus, we proposed that the increment of the gauche conformer of [bmim]+ on the pressure-induced phase transitions is related to the change in the initial configuration of [bmim]+ against anion by compression.
収録刊行物
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- 材料
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材料 63 (9), 679-683, 2014
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001205445403008
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- NII論文ID
- 130004691157
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 025814487
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可