Phase Behavior of Imidazolium-Based Ionic Liquid + Phosphonium-Based Ionic Liquid Mixtures with a Common Anion: Effects of the Alkyl-Chain Length of Cation,Journal of Chemical & Engineering Data

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Phase Behavior of Imidazolium-Based Ionic Liquid + Phosphonium-Based Ionic Liquid Mixtures with a Common Anion: Effects of the Alkyl-Chain Length of Cation
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acs.jced.7b00808
Takuya Shimomura ₁ , Masakazu Sugiyama ₁

Affiliation

The phase behavior of imidazolium-based ionic liquid (IL) + phosphonium-based IL binary mixtures with a common anion has been investigated in the temperature range 253–453 K. Bis(trifluoromethanesulfonyl)amide ([NTf₂]⁻) and tetrafluoroborate ([BF₄]⁻) were selected as common anions. The imidazolium-based IL + phosphonium-based IL mixtures with a common anion showed an upper critical solution temperature (UCST). The phase separation temperatures of the mixtures decreased with increasing alkyl-chain length of the imidazolium cation. In contrast, the phase separation temperatures of the mixtures increased as the alkyl-chain length of the phosphonium cation increased. The phase separation temperatures of the imidazolium-based IL + phosphonium-based IL mixtures with [BF₄]⁻ as a common anion were remarkably higher than those with [NTf₂]⁻.

中文翻译：

咪唑基离子液体+磷基离子液体与常见阴离子的相行为：阳离子的烷基链长度的影响

在253–453 K的温度范围内，研究了咪唑基离子液体（IL）+ nium基IL二元混合物与常见阴离子的相行为。双（三氟甲磺酰基）酰胺（[NTf ₂ ] ^-）和四氟硼酸酯（ [BF ₄ ] ^-）被选为常见阴离子。基于咪唑鎓的IL +基于磷鎓的IL与常见阴离子的混合物显示出较高的临界溶液温度（UCST）。混合物的相分离温度随着咪唑阳离子的烷基链长度的增加而降低。相反，混合物的相分离温度随着the阳离子的烷基链长度的增加而增加。具有[BF ₄ ] ^-作为常见阴离子的咪唑基IL + IL基IL混合物的相分离温度明显高于具有[NTf ₂ ] ^-的咪唑基IL + IL基IL混合物的相分离温度。

更新日期：2018-01-16

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