通过点击反应合成了一种聚乙二醇单甲醚(mPEG)修饰含蒽荧光团及二(2-吡啶甲基)胺(DPA)金属离子识别位点水溶性高分子化合物P1.在纯水溶液中,P1能够与Hg~(2+)形成稳定的1∶1型配合物P1-Hg~(2+),伴随着聚合物P1荧光猝灭.同时,P1-Hg~(2+)络合物对半胱氨酸(Cys)有很好的选择性识别.随着Cys浓度的增加,由于Cys与Hg~(2+)结合,使得P1的荧光得到恢复,且不受其它氨基酸的干扰.
A new Methoxy poly(ethylene glycol)-anchored polymer sensor P1, which contains anthracene fluorephore and di-2-picolylamine metal ions binding site, has been easily synthesized by "click reaction". In pure aqueous solution, P1 can coordinate with Hg~(2+) quickly to form 1∶1 stoichiometry P1-Hg~(2+) complex, with quenching the fluorescence of P1. In addition, P1-Hg~(2+) shows exclusive fluorescence turn-on sensing of cysteine(Cys) over other amino acids for the displacement method.