10 -5 mL, respectively. The Zr-MOF was characterized by FTIR, 1 H NMR, powder X-ray diffraction (PXRD), thermo gravimetric analysis (TGA) and elemental analysis. Interestingly, the Zr-MOF has the high water stability and pH stability, but its fluorescence intensity will show certain change law in the range of pH 0~14. Water and urine sample application test showed that Zr-MOF had high sensitive detection for Fe 3+ , and simulated organic solvents test showed that Zr-MOF has high sensitivity and selectivity to acetone, CCl 4 and xylene.
A new Aluminum metal-organic frameworks(Al-MOF) based on tricarboxylate ligands(L){L = 2,2’,2’-([1,3,5]-triazine-2,4,6-triimino)tribenzoic acid)} has been designed and synthesized. It can be served as a platform of multi-responsive fluorescence sensor for Fe3+, Sr2+ and SiO3
2− in water, which is mainly due to the significant enhancement effect of these ions on the fluorescence intensity of Al-MOF. Especially, Fe3+ ions are rarely able to induce MOFs fluorescence enhancement. The limit of detection for three kinds of ions is 6.62* 10−6 M, 5.37* 10−6 M, 6.85* 10−10 M respectively. Meanwhile, It can also be used as a multi-response fluorescence probe to detect toluene in DMF solution, limit of detection is 9.16* 10−3 M respectively. The structure of Al-MOF was characterized by FTIR, 1H NMR, SEM, TAG, PXRD and element analysis. The PXRD showed that the structure of Al-MOF remained the high water stability and pH stability. The application of water samples and vegetables showed that Al-MOF had high sensitive detection for Fe3+ ions.
2,2',2''- (1,3,4,tribenzoic acid (L, H 3 TATIB) fluorescence response chemosensor has been synthesized by one pot reaction and its fluorescent behaviors to transition metal ions were systematically investigated. The experimental results show that the recognition of Zr 4+ and Fe 3+ is realized in N,N-dimethylformamide (DMF) aqueous solution; The compound L can effectively detect acetone in organic solvent. The detection limits of Zr 4+ and Fe 3+ are 3.60×10 -6 and 1.33×10 -6 mol/L, respectively. It was preliminarily explored that compound L was used as a fluorescent probe to identify Fe 3+ ion in human urine and water samples.
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