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Lanthanide-MOFs as multi-responsive photoluminescence sensor for sensitively detecting Fe3+, Cr2O72- and nitrofuran antibiotics.

ABSTRACT: Fast and selective detection of contaminants plays a key role in meeting human health and environmental concerns. Herein, two groups of isostructural lanthanide MOFs, [Ln(Hpta)(oxalic acid)]·H2O (1-Eu, 2-Gd) and [Ln(pta)(oxalic acid)0.5(H2O)2]·2H2O (3-Eu, 4-Gd) (H2pta = 2-(4-pyridyl)-terephthalic acid, C2O4- = oxalic acid), were synthesized by solvothermal method. Single crystal X-ray diffraction reveals that 1 and 2 are 3D neutral frameworks, while 3 and 4 consist of 2D layers with parallelogram holes and stack into 3D networks through O-H⋯N and O-H⋯O hydrogen bonding interactions. All complexes remain crystalline and stable below 400 °C, suggesting preeminent thermostability. Noteworthily, only 3 shows excellent chemical stability in water and organic solvent. Therefore, the solid-state fluorescence spectrum was used to characterize 3 which exhibited intense red luminescence. The N active sites in the pore channels of 3 are conducive to displaying a distinct quenching effect for Fe3+ cations in aqueous solutions, Cr2O72- anions in DMF and DMA solutions, and nitrofuran antibiotics in the DMF solvent. Overall, 3 is a prospective luminescent sensor for detecting Fe3+, Cr2O72- and nitrofuran antibiotics.

SUBMITTER: Feng J 

PROVIDER: S-EPMC10475880 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature

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Lanthanide-MOFs as multi-responsive photoluminescence sensor for sensitively detecting Fe<sup>3+</sup>, Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup> and nitrofuran antibiotics.

Feng Jingjuan J   Kong Cunding C   Chen Yunhui Y   Cen Peipei P   Ding Yi Y   Guo Yan Y   Zhang Fengyuan F   Liu Xiangyu X  

RSC advances 20230801 37

Fast and selective detection of contaminants plays a key role in meeting human health and environmental concerns. Herein, two groups of isostructural lanthanide MOFs, [Ln(Hpta)(oxalic acid)]·H<sub>2</sub>O (1-Eu, 2-Gd) and [Ln(pta)(oxalic acid)<sub>0.5</sub>(H<sub>2</sub>O)<sub>2</sub>]·2H<sub>2</sub>O (3-Eu, 4-Gd) (H<sub>2</sub>pta = 2-(4-pyridyl)-terephthalic acid, C<sub>2</sub>O<sub>4</sub><sup>-</sup> = oxalic acid), were synthesized by solvothermal method. Single crystal X-ray diffraction r  ...[more]

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