Integrated Science Education and Research Centre, Siksha Bhavana, Visva-Bharati, Santiniketan, 731235, India.
Sci Rep. 2019 Dec 18;9(1):19378. doi: 10.1038/s41598-019-55910-4.
Functional mesoporous silica probes, MCM-TFM and SBA-TFM, have been synthesized with varying pore sizes and having S-donor sites judiciously selected to bind soft metal centers. The soft S-donor centers are contributed by the thiol functional groups that are introduced into the silica matrices by functionalization with tris(4-formylphenyl)amine followed by 2-aminothiophenol. The materials rapidly and selectively detect Hg colorimetrically and the change in color profile can be perceived through bare eyes. The probes can decontaminate the pollutant heavy metal from aqueous medium at ppb level and the materials are recyclable and reusable for several separation cycles.
功能化介孔硅探针 MCM-TFM 和 SBA-TFM 已通过合理选择具有 S 供体位点的不同孔径合成，以结合软金属中心。软 S 供体中心由巯基官能团贡献，这些官能团通过与三(4-醛基苯基)胺反应，然后与 2-氨基噻吩进行功能化，引入到硅基质中。这些材料可快速、选择性地通过比色法检测 Hg，并且可以通过肉眼观察到颜色轮廓的变化。探针可以从水中去除污染物重金属，达到 ppb 级，并且材料可回收，可重复使用数次分离循环。
