Polymer pendant crown thioethers: synthesis, characterization and Hg~(2+) extraction studies of polymer-supported thiacrowns ([14]aneS_4 and [17]aneS_5)

摘要

We are interested in designing polymer-bound extractants for Hg~(2+) remediation in mixed-waste streams. Towards this goal, we have synthesized novel polymer extractants where 2-aminomethylthiacrowns are immobilized on a polystyrene-divinylbenzene matrix through the pendant arm of the corwns. Reaction of 2,3-dimercapto-1-propanol with either 4,7-dithiadecane-1,10-di-p-toluensulfonate or 4,7,10-trithiatridecane-1,13-di-p-toluenesulfonate generated the 2-hydroxy-methylthiacrowns, 3 ([14]aneS_4-OH) and 4 ([17]aneS_5-OH).