A 2D mixed-lanthanide metal‒organic framework as dual-emitting luminescent sensor for ratiometric detection of tetracycline and nitrophenols

•Mixed-lanthanide strategy was practiced to construct ratiometric luminescent sensor.•Dual-emissive mixed-lanthanide MOF as a ratiometric sensor achieves sensitive detection of tetracycline and nitrophenols.•Noticeable luminescence turn-off response of membrane-based sensor towards tetracycline is v...

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Bibliographic Details
Published inJournal of molecular structure Vol. 1295; p. 136734
Main Authors Luo, Ai-Yi, Lan, Bi-Liu, Shao, Bing, Lu, Xiu-Mei, Lan, Yuan-Fu, Liao, Yong-Zhi, Zhang, Zhong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.01.2024
Subjects
Luminescent sensing
Metal‒organic framework
Nitrophenol
Tetracycline
Visual detection
Luminescent sensing
Metal‒organic framework
Nitrophenol
Visual detection
Tetracycline
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Summary:•Mixed-lanthanide strategy was practiced to construct ratiometric luminescent sensor.•Dual-emissive mixed-lanthanide MOF as a ratiometric sensor achieves sensitive detection of tetracycline and nitrophenols.•Noticeable luminescence turn-off response of membrane-based sensor towards tetracycline is visual by naked eye. Solvothermal treatment of Gd(III)/Eu(III) salts with 2,3,5,6-tetrachloroterephthalic acid (H2tClbdc) and 1,10-phenanthroline (phen) afforded three two-dimensional lanthanide metal‒organic frameworks (MOFs), [Ln(tClbdc)(phen)(H2O)(NO3)]n (1-Ln, Ln = Gd, Eu, Eu0.03Gd0.97). The dual-emitting characteristic along with the excellent solution and photophysical stability of the mixed-lanthanide MOF 1-Eu0.03Gd0.97 make it a highly sensitive luminescent sensor to ratiometrically detect tetracycline (TC), picric acid (PA) and 4-nitrophenol (4-NP), with the limits of detection of 0.38 μM, 0.75 μM and 1.49 μM for TC, PA and 4-NP, respectively. The significant luminescence quenching of the lanthanide-based sensor by these organic pollutants might be ascribed to inner filtration effect (IFE), fluorescence resonance energy transfer (FRET) and hydrogen-bonding and/or electrostatic interactions between the sensor and phenolic analytes. More significantly, 1-Eu0.03Gd0.97 filled mixed-matrix membranes could be employed as an easy-to-use sensory tool for visual recognition of TC by the turn-off red emission signal. [Display omitted]
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2023.136734