高选择性快速识别汞(Ⅱ)离子的磺酰腙型探针的合成及在吸附中的应用

Synthesis of Sulfonylhydrazone Probe with High Selectivity and Rapid Identification of Hg(Ⅱ) Ion and Its Application in Adsorption

以苯磺酰肼和1-芘甲醛为原料,设计合成了一种结构简单的可快速识别汞(Ⅱ)离子(Hg^(2+))的磺酰腙型荧光探针(Z)-N’-(芘-1-基亚甲基)苯磺酰腙(BSB),并通过氢核磁共振波谱仪(^(1)H NMR)对其结构进行了表征。BSB对Hg;展示出高选择性、专一性和快速响应性,检测限为2.07×10^(-7)mol/L,响应时间仅需15 s。通过job’s曲线,^(1)H NMR滴定实验和高分辨率质谱(HRMS)对响应机理进行了探究,并且BSB可以检测不同水样中的Hg^(2+)。有趣的是,将BSB和聚丙烯酰胺(PAM)相掺杂制备出了对Hg;具有高去除性能的新型高分子材料(PAM-BSB),去除率达到99.63%,并通过扫描电子显微镜(SEM)对PAM-BSB吸附前后的微观形貌进行了观察。

A simple fluorescent probe(Z)-N’-(pyrene-1-ylmethylene)benzenesulfonylhydrazone(BSB)was designed and synthesized by using benzenesulfonylhydrazine and 1-pyrene-formaldehyde as materials,and its structure was characterized by hydrogen nuclear magnetic resonance spectroscopy(^(1)H NMR). BSB shows high selectivity,specificity and rapid response to Hg^(2+). The detection limit is 2. 07×10^(-7)mol/L,and the response time is only 15 s. The optimal response mechanism is explored through job’s curve,^(1)H NMR titration experiment and high resolution mass spectrometry(HRMS). BSB could detect Hg;in different water samples. Interestingly,a novel polymer material(PAM-BSB)with high Hg^(2+) removal performance is prepared by doping BSB with polyacrylamide(PAM). The removal rate is 99. 63%,and the micro-morphology of PAM-BSB before and after adsorption is observed by scanning electron microscopy(SEM).