期刊
DYES AND PIGMENTS
卷 197, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109812
关键词
Lanthanide metal-organic frameworks; Mixed matrix membranes; Ratiometric luminescent sensor; Luminescence detecting; Water stability
资金
- Joint Fund Project of the Natural Science Foundation of Jilin Province [YDZJ202101ZYTS052]
- Thirteenth Five-Year Program for Science and Technology of Education Department of Jilin Province [JJKH20200738KJ, JJKH20200803KJ, JJKH20200742KJ, JJKH20200740KJ]
- Foundation of Changchun University of Science and Technology [XQNJJ-2019-12, XQNJJ-2019-14]
Metal-organic framework-based mixed matrix membranes and ratiometric fluorescent sensors have garnered attention for sensing applications. A two-dimensional europium-based metal-organic framework, CUST-506, was synthesized and characterized, leading to the successful preparation of Eu-MOF-based mixed matrix membranes (CUST-506-based MMMs) with excellent processability and water stability. By anchoring formic acid during hydrothermal synthesis, a one-dimensional compound CUST-507 with dual emission centers was generated, showing unique auto-calibration effects and sensitive sensing capabilities.
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.(L-Cl4)1.5.H2O] (CUST-506). (L-Cl4 = 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 CUST506, a one dimensional (1D) compound {[Eu(L-N2).(L-Cl4)0.5(COOH).2H2O].(L-Cl4)0.5}(CUST-507) with two emission centers from Eu3+-based centers and free L-Cl4 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.
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