Mutelet Fabrice, Jaubert Jean-Noël, Rogalski Marek, Harmand Julie, Sindt Michèle, Mieloszynski Jean-Luc
Laboratoire de Thermodynamique des Milieux Polyphasés, Nancy-Université, 1 rue Grandville, BP 20451 4001 Nancy, France.
J Phys Chem B. 2008 Mar 27;112(12):3773-85. doi: 10.1021/jp7109862. Epub 2008 Mar 5.
Activity coefficients at infinite dilution, gammainfinity, of organic compounds in two new room-temperature ionic liquids (n-methacryloyloxyhexyl-N-methylimidazolium bromide (C10H17O2MIM)(Br) at 313.15 and 323.15 K and n-acryloyloxypropyl-N-methylimidazolium bromide(C6H11O2MIM)(Br)) were determined using inverse gas chromatography. Phase loading studies of the net retention volume per gram of packing as a function of the percent phase loading were used to estimate the influence of concurrent retention mechanisms on the accuracy of activity coefficients at infinite dilution of solutes in both ionic liquids. It was found that most of the solutes were retained largely by partition with a small contribution from adsorption and that n-alkanes were retained predominantly by interfacial adsorption on ionic liquids studied in this work. The solvation characteristics of the two ionic liquids were evaluated using the Abraham solvation parameter model.
使用反相气相色谱法测定了两种新型室温离子液体（313.15 K和323.15 K下的n - 甲基丙烯酰氧基己基 - N - 甲基咪唑溴化物（C10H17O2MIM）（Br）以及n - 丙烯酰氧基丙基 - N - 甲基咪唑溴化物（C6H11O2MIM）（Br））中有机化合物的无限稀释活度系数γ∞。通过研究每克填料的净保留体积随固定相负载百分比的变化进行的固定相负载研究，来估算同时存在的保留机制对两种离子液体中溶质无限稀释活度系数准确性的影响。结果发现，大多数溶质主要通过分配保留，吸附的贡献较小，并且在本研究的离子液体中，正构烷烃主要通过界面吸附保留。使用亚伯拉罕溶剂化参数模型评估了这两种离子液体的溶剂化特性。
