Novel dual functionalized ionic liquids were synthesized using four different cyclic anions, azolide/ piperazine, in combination with triethylenetetramine cation. These ionic liquids were used to absorb CO₂ in aqueous form at 300 K and ambient pressure and [TETAH][Pz], [TETAH][Im], [TETAH][Py] and [TETAH][Tz], showed 2.05, 1.81, 1.73 and 1.50, CO₂loading in mol of CO₂ / mol ionic liquids, respectively, higher than industrial amine absorbents like monoethanolamine, which have 0.65−0.68 mol of CO₂ /mol . Based on kinetics of CO₂ absorption, Hatta number was calculated for comparative a study, and it showed that high interfacial area is favorable for higher absorption rate. Aqueous [TETAH][Im] and [TETAH][Py] showed high basicity and good yields of carbamate in these two DFILs. ¹³C NMR results suggest that steric hindrance effect decreased in aqueous medium, and the reaction of piperazine anion with CO₂ and [TETAH][Pz] resulted in higher CO₂ loading. Bond length and angle of CO₂ -amines system was calculated by geometry optimization simulation and shows attraction of CO₂ is higher in [Pz] anion. Regeneration cyclic efficiency was found to be around 90–95 % for multiple absorption desorption cycles with negligible absorbent loss.

使用四种不同的环状阴离子，偶氮内酯/哌嗪，结合三亚乙基四胺阳离子，合成了新型的双功能离子液体。这些离子液体用于在300 K和环境压力下以水性形式吸收CO ₂，[TETAH] [Pz]，[TETAH] [Im]，[TETAH] [Py]和[TETAH] [Tz]显示为2.05，分别以mol CO ₂ / mol离子液体的1.81、1.73和1.50的CO ₂负载量要高于工业胺吸收剂（如单乙醇胺），后者的CO ₂ / mol值为0.65-0.68 mol。基于CO _2的动力学通过计算Hatta数进行比较研究，结果表明，高界面面积有利于更高的吸收率。[TETAH] [Im]和[TETAH] [Py]水溶液在这两个DFIL中显示出较高的碱度和良好的氨基甲酸酯收率。¹³ C NMR结果表明在水介质中空间位阻效应降低，并且哌嗪阴离子与CO ₂和[TETAH] [Pz]的反应导致较高的CO ₂负载量。通过几何优化仿真计算了CO _2-胺体系的键长和键角，结果表明[Pz]阴离子中CO _2的吸引力较高。发现多次吸收解吸循环的再生循环效率约为90–95％，吸收剂损失可忽略不计。