A Terbium Metal–Organic Framework for Highly Selective and Sensitive Luminescence Sensing of Hg2+ Ions in Aqueous Solution |
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| Authors: | Dr Tifeng Xia Dr Tao Song Gege Zhang Prof?Dr Yuanjing Cui Dr Yu Yang Prof?Dr Zhiyu Wang Prof?Dr Guodong Qian |
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| Institution: | State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University, Hangzhou, P. R. China |
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| Abstract: | A series of isomorphic lanthanide metal–organic frameworks (MOFs) Ln(TATAB)?(DMF)4(H2O)(MeOH)0.5 (LnTATAB, Ln=Eu, Tb, Sm, Dy, Gd; H3TATAB=4,4′,4′′‐s‐triazine‐1,3,5‐triyltri‐p‐aminobenzoic acid) have been solvothermally synthesized and structurally characterized. Among these MOFs, TbTATAB exhibits good water stability and a high fluorescence quantum yield. Because mercury ions (Hg2+) have a high affinity to nitrogen atoms, and the space between multiple nitrogen atoms from triazine and imino groups is suitable for interacting with Hg2+ ions, TbTATAB shows highly selective and sensitive detection of Hg2+ in aqueous solution with a detection limit of 4.4 nm . Furthermore, it was successfully applied to detect Hg2+ ions in natural water samples. |
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| Keywords: | fluorescence luminescence sensing mercury metal– organic frameworks terbium |
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