Yavir Kateryna, Marcinkowski Łukasz, Kloskowski Adam, Namieśnik Jacek
Gdansk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, Narutowicza St 11/12, Gdansk 80-233, Poland.
Gdansk University of Technology, Faculty of Chemistry, Department of Physical Chemistry, Narutowicza St 11/12, Gdansk 80-233, Poland.
J AOAC Int. 2017 Nov 1;100(6):1660-1670. doi: 10.5740/jaoacint.17-210. Epub 2017 Jul 13.
In this work, four ionic liquids (ILs) based on the N-alkyl-N-methylmorpholinium cation ([Mor1,R], in which R = 2, 4, 8, or 10) and bis(trifluoromethanesulfonyl)imide anion were synthesized. Using GLC, a number of parameters describing the sorption properties of the investigated ILs were determined. The values of Kovats indices, McReynolds constants, and activity coefficients at infinite dilution were the basis for the evaluation of intermolecular interactions. The effect of the chain length of the alkyl substituent in the cation, which was used to modify their polarity, has been discussed. Comparison of the characteristics of the investigated IL-based stationary phases with commercially available ones allowed for the statement that the investigated ILs were more polar. The tested ILs had a relatively high polarity. Increasing the length of the alkyl chain in the morpholinium ring reduced polarity. ILs based on the morpholinium cation were tunable in a wide range of their polarity.
在本工作中，合成了四种基于N-烷基-N-甲基吗啉鎓阳离子（[Mor1,R]，其中R = 2、4、8或10）和双（三氟甲磺酰）亚胺阴离子的离子液体（ILs）。使用气相色谱法（GLC），测定了一些描述所研究离子液体吸附性能的参数。科瓦茨指数、麦克雷诺兹常数和无限稀释时的活度系数值是评估分子间相互作用的基础。讨论了用于改变其极性的阳离子中烷基取代基链长的影响。将所研究的基于离子液体的固定相的特性与市售固定相进行比较后可以得出结论：所研究的离子液体极性更强。测试的离子液体具有相对较高的极性。吗啉鎓环中烷基链长度的增加会降低极性。基于吗啉鎓阳离子的离子液体在很宽的极性范围内是可调谐的。
