Ancillary Ligand Enabled Structural And Fluorescence Diversity In Metal-Organic Frameworks: Application For The Ultra-Sensitive Detection Of Nitrofuran Antibiotics
INORGANIC CHEMISTRY FRONTIERS(2021)
摘要
Fabrication of high-performance sensory materials for the ultra-sensitive detection of antibiotics in water is of significant importance for community health and environmental quality. Herein, two Zn(II)-based metal-organic frameworks, {[Zn-3(cbbi)(2)(bpe)(H2O)(6)]center dot 2H(2)O}(n) (FCS-4) and {[Zn-4(OH)(2)(cbbi)(2)(bpee)(H2O)(4)]center dot 2H(2)O}(n) (FCS-5), were prepared hydrothermally and employed as chemosensors for the ultra-sensitive detection of nitrofuran antibiotics. Interestingly, different spacers and flexibility in the nitrogen-donor ancillary ligands resulted in different topological structures and fluorescence properties. FCS-5 exhibited much better sensitivity for nitrofurazone and nitrofurantoin detection, with limits of detection (LOD) of 0.22 and 0.15 ppm, respectively. Furthermore, mechanism exploration indicated that photon-induced electron transfer plays a key role in the ultra-sensitive detection of nitrofuran antibiotics.
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关键词
ancillary ligand,fluorescence diversity,metal–organic frameworks,antibiotics,ultra-sensitive
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