Highly sensitive luminescent detection toward polytypic antibiotics by a water-stable and white-light-emitting MOF-76 derivative

• Published in: Dyes and pigments Vol. 180; p. 108444
• Main Authors: Yang, Yang, Zhao, Lina, Sun, Mingao, Wei, Pengpeng, Li, Guangming, Li, Yuxin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2020
• Subjects: Lanthanide metal-organic framework; Luminescent detection; Multiplex detection; Polytypic antibiotics; White-light emission; Polytypic antibiotics; Luminescent detection; White-light emission; Lanthanide metal-organic framework; Multiplex detection
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/j.dyepig.2020.108444

Antibiotics in hydrology system is a main ecological environmental pollution confronted by sustainable development. Wide varieties and low allowable concentration of antibiotics challenge the detection capability of indicators. Therefore, it is significant and necessary to develop multiplex detection technique toward polytypic antibiotics with ultralow detection limits in aqueous medium. Herein, a white-light-emitting luminophore has been prepared through exchanging terbium(III) ions with europium(III) ions in MOF-76 which is one of the most famous lanthanide-based metal-organic frameworks. Structural and luminescent stabilities of the luminophore render its application as luminescent indicator. As expected, the as-prepared luminophore owns multiplex detection capability toward three classes of common antibiotics via three detection behaviors: toward nitroimidazoles via lanthanide luminescent quenching; toward quinolones via luminescence color change; toward nitrofurans via bathochromic shift of ligand fluorescence. Remarkably, the detection limits could reach to ppb levels for the whole six antibiotics and even sub-ppb level for ciprofloxacin, meeting the requirement detecting antibiotics in water by U.S. Environmental Protection Agency and World Health Organization. The facile preparation, along with multiplex detection capacity and ultralow detection limits, implies the promising potential of the as-prepared white-light-emitting indicator in practice. A white-light-emitting MOF-76 derivative employed as ppb-level indicator toward nitroimidazole, quinolone and nitrofuran antibiotics in aqueous phase. [Display omitted]