首页|Novel Eu-MOF-based mixed matrix membranes and ID Eu-MOF-based ratiometric fluorescent sensor for the detection of metronidazole and PA in water
Novel Eu-MOF-based mixed matrix membranes and ID Eu-MOF-based ratiometric fluorescent sensor for the detection of metronidazole and PA in water
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NSTL
Metal organic framework-based mixed matrix membranes and ratiometric fluorescent sensors have received significant attention in application of sensing. Herein, a two-dimensional europium-based metal organic frameworks, [Eu(L-N2)2-CL-C14)i.5-H2O] (CUST-506). (L-C14 = 2,3,5,6-tetrachloroterephthalic acid, L-N2 = 1,10-phenanthroline) has been synthesized and characterized. Then, by immobilizing water-stable CUST-506 into agarose hydrogels, the Eu-MOF-based mixed matrix membranes (CUST-506-based MMMs) were successfully prepared. The CUST-506-based MMMs exhibit not only the integrity and the metronidazole, picric acid (PA) sensing nature of Eu-MOF powder, but also excellent processability. Moreover, the Eu-MOF-based MMMs show distinguished water-stability. More interestingly, during the hydrothermal synthesis process, through anchoring the formic acid into the framworks to break the symmetrical coordination environment of the CUST-506, a one dimensional (ID) compound {[Eu(L-N2)-(L-C14)o.5(COOH)-2H2O]-(L-C14)0.s}(CUST-507) with two emission centers from Eu~(3+)-based centers and free L-C14 molecules is generated. CUST-507 displayes a unique ability of auto-calibration effect based on the dual emission mechanism and sensitive sensing of metronidazole and picric acid. This work highlights a simple fabrication strategy for MOF-based mixed matrix membranes and overcomes the environmental interference for ratiometric fluorescent sensor.
School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, China
School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materiab and Chemistry, Joint Sino-Russian Laboratory of Optical Materials and Chemistry Changchun University of Science and Technology, Changchun, 130022, China
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