We report the synthesis of an ureido polymer containing 19-membered rings, prepared by the cyclopolymerization of a bifunctional monomer trans-1,2-bis(acryloyloxyethylureido)cyclohexane (TBAUCH) and studied for the selective adsorption of Ag⁺. PolyTBAUCH adsorbed Ag⁺ with an efficiency of 99.8%, and the maximum adsorption capacity was 39.8 mg/g. PolyTBAUCH selectively adsorbed Ag⁺ from an aqueous solution containing 20 different metal ions in similar concentrations. The selective adsorption depends on the controlling regioselective effect of the ring structure and the ureido groups. PolyTBAUCH could be reused at least for 5 cycles after desorption of Ag⁺ and maintained an Ag⁺ adsorption of 95.6% during the 5th cycle.

中文翻译：

---

选择性的Ag ⁺脲基聚合物吸附制备通过环化给予大环重复单元

我们报告了由双功能单体反式-1,2-双（丙烯酰氧基乙基脲基）环己烷（TBAUCH）的环聚合制备的含19元环的脲基聚合物的合成，并研究了Ag ⁺的选择性吸附。PolyTBAUCH吸附的Ag ⁺ 99.8％的效率，最大吸附容量为39.8毫克/克。PolyTBAUCH从含有20种不同浓度金属离子的水溶液中选择性吸附Ag ⁺。选择性吸附取决于环结构和脲基的控制区域选择性作用。Ag ⁺解吸并保持Ag ⁺后，PolyTBAUCH可以重复使用至少5个循环 在第5个循环中吸附95.6％。