Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials, Liaoning University, Shenyang 110036, China.
J Phys Chem B. 2012 May 24;116(20):5971-6. doi: 10.1021/jp301985g. Epub 2012 May 14.
Five propionic acid ionic liquids (PrAILs) [C(n)mim][Pro] (n = 2-6) (1-alkyl-3-methylimidazolium propionate) have been prepared by the neutralization method and characterized by (1)H NMR spectroscopy and differential scanning calorimetry (DSC). Their density, ρ, surface tension, γ, and refractive index, n(D), were measured at (298.15 ± 0.05) K, and the experimental values of parachor for the PrAILs were calculated. Using the parachor values of C(n)mim obtained by Guan et al., the anionic parachor values of [C(n)mim][Pro] (n = 2-6), [C(2)mim][RBF(3)] (R = N-C(n)H(2n+1) (n = 1-5)), [C(n)mim][Gly] (n = 2-6), and [C(n)mim][PF(3)(CF(2)CF(3))(3)] (n = 1-6) were determined. Then, the parachor, surface tension, and refractive index of the ILs investigated in this work were estimated. The estimated values correlate quite well with the corresponding experimental values.
已通过中和法制备了五种丙酸离子液体（PrAILs）[C(n)mim][Pro]（n = 2-6）（1-烷基-3-甲基咪唑丙酸盐），并通过（1）H NMR 光谱和差示扫描量热法（DSC）进行了表征。在（298.15 ± 0.05）K 下测量了它们的密度 ρ、表面张力 γ 和折射率 n(D)，并计算了 PrAILs 的比容实验值。使用 Guan 等人获得的 C(n)mim 的比容值，确定了 [C(n)mim][Pro]（n = 2-6）、[C(2)mim][RBF(3)]（R = N-C(n)H(2n+1)（n = 1-5））、[C(n)mim][Gly]（n = 2-6）和 [C(n)mim][PF(3)(CF(2)CF(3))(3)]（n = 1-6）的阴离子比容值。然后，估算了本工作中研究的离子液体的比容、表面张力和折射率。估算值与相应的实验值相关性较好。
