Metal–Organic Frameworks with Triazine and Amine Functional Groups for Iodine Removal and Sensitive Detection of Cu<sup>2+</sup> and Fe<sup>3+</sup> Ions
Xiao‐Feng Zhong, Zi-Can Ma, Jia-Jie Lin, Ying Wu, Gang Liang, Yangyang Zhang, Dejian Chen, Kai‐Ping Xie, Zong‐Wen Mo, Xiao‐Ming Chen
Abstract
Water pollution, especially industrial or nuclear wastewater, has become a global environmental problem and poses a serious threat to human life and health. Efficient treatment of wastewater is still a huge challenge. Herein, we report two new metal–organic frameworks (MOFs), [Me 2 NH 2 ][Sr 4 (tatab) 3 (DMF) 0.4 (H 2 O) 1.6 ]·guest ( 1 ) and [Me 2 NH 2 ] 5 [La 3 ( μ -O)(tatat) 2 ]·guest ( 2 ) (H 3 tatab = 4,4′,4″-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl))tribenzoic acid, DMF = N, N -dimethylformamide, and H 6 tatat = 5,5′,5″-(1,3,5-triazine-2,4,6-triyl)tris-(azanediyl)triisophthalic acid), with triazine and amine functional groups. Both of them contain anionic host frameworks and Me 2 NH 2 + as counter cations in the pores. By virtue of the strong host–guest interactions between the triazine/imine functional groups on the framework and I 2, both 1 and 2 are able to effectively remove iodine from the solution. Also, interestingly, 1 and 2 exhibit different luminescence properties, and the prominent 2 possesses sensitive fluorescence quenching behavior toward Cu 2+ or Fe 3+ ions, which can be used to effectively detect these ions in water.