文献类型：期刊文献

英文题名：Porphyrinic MOFs for reversible fluorescent and colorimetric sensing of mercury(II) ions in aqueous phase

作者：Yang, Jian[1];Wang, Zhe[1];Li, Yongsheng[1];Zhuang, Qixin[1];Zhao, Wenru[1];Gu, Jinlou[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：74

起止页码：69807

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20163102677587);WOS:【SCI-EXPANDED(收录号:WOS:000381512800019)】；

基金：This work was financially supported by the Natural Science Foundation of China (51072053, 51372084), the Innovation Program of Shanghai Municipal Education Commission (13zz040), and the 111 Project (B14018).

语种：英文

外文关键词：Potable water - Organometallics - Environmental Protection Agency - Probes - Crystalline materials - Colorimetry - Trace elements - Zirconium compounds - Fluorescence quenching

摘要：Developing an effective method that could provide simple, rapid and visual determination of Hg2+ in water has attracted great attention. In this work, a novel chemical sensor with a porphyrin-based luminescent metal-organic framework (LMOFs) which exhibited a dual-mode response to trace amounts of mercury ions (Hg2+) has been successfully constructed. The porous LMOF probe was fabricated using a simple solvothermal reaction, and assembled with Zr-O clusters as inorganic nodes and meso-tetra(4-carboxyphenyl) porphyrin (TCPP) ligands as organic bridging struts. The sensing activity was realized by using the inherent TCPP struts as recognition sites and signal reporter, which presented a specific interaction with Hg2+ over other potentially interfering metallic cations. The LMOFs which were developed exhibited a visible fluorescent quenching (bright red-dark red) and a colorimetric response (purple-light green) in the presence of Hg2+ with a response rate as rapid as 2 min. Additionally, the fluorescence quenching showed a linear correlation in the Hg2+ concentration range from 0.1 to 10 mM and the limit of detection was calculated to be 6 nM, which was in agreement with the acceptable level of Hg2+ in drinking water mandated by the United States Environmental Protection Agency. Furthermore, the sensor for Hg2+ detection was reversible after the treatment with potassium iodide solution, which suggested that it has great potential as an economical alternative for practical Hg2+ quantification in water. The easily constructed sensory probe was also applied to determine the concentration of Hg2+ in tap water to demonstrate its practical applications.