Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
J Am Chem Soc. 2011 Aug 10;133(31):11916-9. doi: 10.1021/ja204808h. Epub 2011 Jul 15.
A novel strategy for SO(2) capture through multiple-site absorption in the anion of several azole-based ionic liquids is reported. An extremely high capacity of SO(2) (>3.5 mol/mol) and excellent reversibility (28 recycles) were achieved by tuning the interaction between the basic anion and acidic SO(2). Spectroscopic investigations and quantum-mechanical calculations showed that such high SO(2) capacity originates from the multiple sites of interaction between the anion and SO(2). These tunable azole-based ionic liquids with multiple sites offer significant improvements over commonly used absorbents, indicating the promise for industrial applications in acid gas separation.
本文报道了一种通过唑基离子液体阴离子的多吸附位捕获 SO(2)的新策略。通过调节碱性阴离子与酸性 SO(2)之间的相互作用，实现了超高的 SO(2)容量（>3.5 mol/mol）和优异的可重复性（28 次循环）。光谱研究和量子力学计算表明，这种高 SO(2)容量源于阴离子与 SO(2)之间的多个相互作用位点。这些具有多吸附位的可调唑基离子液体比常用的吸收剂有了显著的改进，为在酸性气体分离中工业应用提供了前景。
