Xu Qiang, Jiang Wei, Xiao Jianbai, Wei Xionghui
College of Chemistry and Molecular Engineering, Peking University 100871 PR China
RSC Adv. 2018 Dec 18;8(73):42116-42122. doi: 10.1039/c8ra08991d. eCollection 2018 Dec 12.
An easily prepared ionic liquid was synthesized by a one-step method and applied in SO absorption efficiently. The cation of the ionic liquid is a supramolecular structure consisting of NH and tetraglyme, similar to the structure of NH and crown ether, and the anion is selected as SCN. The ionic liquid has good thermal stability. Under the conditions of 293 K and 1 bar, one mol ionic liquid can absorb 2.73 mol SO, which is about 30% higher than tetraglyme. The absorption mechanism was characterized using IR and NMR. And the results confirmed that the interaction mechanism between SO and the ionic liquid is a physical interaction rather than a chemical interaction.
通过一步法合成了一种易于制备的离子液体，并将其有效地应用于SO吸收。该离子液体的阳离子是由NH和四甘醇二甲醚组成的超分子结构，类似于NH和冠醚的结构，阴离子选择为SCN。该离子液体具有良好的热稳定性。在293K和1巴的条件下，1摩尔离子液体可吸收2.73摩尔SO，比四甘醇二甲醚高约30%。利用红外光谱和核磁共振对吸收机理进行了表征。结果证实，SO与离子液体之间的相互作用机理是物理相互作用而非化学相互作用。
