Detection and Sorption of Heavy Metal Ions in Aqueous Media by a Fluorescent Zr(IV) Metal–Organic Framework Functionalized with 2-Picolylamine Receptor Groups
作者:Stavros A. Diamantis、Anastasia D. Pournara、Eirini D. Koutsouroubi、Constantinos Moularas、Yiannis Deligiannakis、Gerasimos S. Armatas、Antonios G. Hatzidimitriou、Manolis J. Manos、Theodore Lazarides
DOI:10.1021/acs.inorgchem.2c00434
日期:2022.5.23
which shows highly efficient fluorescence sensing and sorption of heavy metal cations. We demonstrate by detailed fluorescence studies the ability of a water-dispersible composite of dMOR-2 with polyvinylpyrrolidone for real-time detection of Cu2+, Pb2+, and Hg2+ in aqueous media. The limits of detection were found to be below 2 ppb for these species, while the system’s performance is not affected by
重金属离子导致的全球环境污染日益严重,这提高了研究新型多功能材料以同时检测和去除水资源中这些污染物的重要性。在这项研究中,我们报道了一种基于对苯二甲酸酯配体的微孔 8 连接 Zr 4+金属有机骨架 (MOF),该配体装饰有螯合 2-吡啶甲胺侧基 ( dMOR-2 ),它显示出高效的荧光传感和吸附重金属阳离子。我们通过详细的荧光研究证明了dMOR-2与聚乙烯吡咯烷酮的水分散性复合材料实时检测 Cu 2+、Pb 2+和 Hg 2+的能力在水性介质中。发现这些物种的检测限低于 2 ppb,而系统的性能不受其他潜在竞争离子存在的影响。此外,吸附研究表明,dMOR-2与海藻酸钙的复合材料 ( dMOR-2@CaA ) 是一种出色的 Pb 2+和 Cu 2+离子吸附剂,容量分别为 376 ± 15 和 117 ± 4 mg/g dMOR-2@CaA,同时显示出在低初始浓度和大量过量的其他阳离子物质存在