期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 20, 期 5, 页码 3118-3127出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp02807e
关键词
-
资金
- KAKENHI from the Japan Society for the Promotion of Science (JSPS) [16H04132]
- Grants-in-Aid for Scientific Research [16H04132] Funding Source: KAKEN
In recent years, solvate and protic ionic liquids (ILs) have attracted much attention. We synthesized both types of ILs from alkyl aza-crown ethers (L = N-propyl-1-aza-15-crown-5 (L-1) and N-C6F13C2H4-1-aza-15-crown-5 (L-2)). The solvate ILs [ML][Tf2N] (M = Na+, K+) were solids (T-m = 58-68 degrees C), whereas the solvate ILs [ML][Tf2N] (M = Li+, Ag+) and protic ILs [HL][Tf2N] were liquids with low glass transition temperatures. The ILs containing Na ions were more crystalline and exhibited higher melting points than the other ILs. The decomposition temperatures of the protic ILs were higher than those of the solvate ILs. A protic IL with a paramagnetic anion, [HL1][FeCl4] (T-m = 70.5 degrees C), was also synthesized and its crystal structure was determined. The solvate ILs [NaL2][X] (X = Cl-, CF3CO2-, TsO-, PhSO3-) exhibited a lower critical solution temperature (LCST)-type behavior in water. The effects of salt addition on the LCST of L-2 were also investigated. The LCST of these ILs generally increased with increasing hydrophilicity or basicity of the counter anion. This tendency, which is nearly opposite to that of ILs with quaternary onium cations, is ascribed to the amphiphilic nature of the cation. The corresponding protic ILs did not exhibit LCST behavior.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据