Collaborative compounding of metal-organic frameworks and lanthanide coordination polymers for ratiometric visual detection of tetracycline. (October 2021)

• Record Type: Journal Article
• Authors: Gan, Ziyu; Zhang, Wen; Shi, Jiyong; Xu, Xuechao; Hu, Xuetao; Zhang, Xinai; Wang, Xin; Arslan, Muhammad; Xiao, Jianbo; Zou, Xiaobo
• Is Part Of: Dyes and pigments. Volume 194(2021)
• Publication Date: 2021-10
• Subjects: Dyes -- Europium ions -- Sensitive detection -- MOF-5 -- Fluorescence sensor -- Milk and pork; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109545
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: In current study, a ratiometric fluorescence sensor (FSS@MOF-5/GMP-Eu) based on self-assembly of Eu 3+ and guanosine monophosphate (GMP) on the surface of fluorescein loaded MOF-5 (FSS@MOF-5) is designed and fabricated for visual detection of tetracycline (TC). As the TC recognizer, Eu 3+ specifically reacts with TC to form EuTC complex and results in fluorescence enhancement due to the antenna effect. With the TC addition, visible fluorescence changes from yellowish-green to orange and finally to red can be easily observed by naked eyes. The proposed FSS@MOF-5/GMP-Eu displays an excellent linear relationship with TC (0–20 μM), providing a low detection limit of 18.5 nM. The ratiometric sensor exhibits excellent selectivity to TC against other interferents owing to the formation of EuTC complex. The prepared FSS@MOF-5/GMP-Eu can be employed for TC detection in milk and pork and will also be valuable for use in fluorescence sensor applications. Graphical abstract: Image 1 Highlights: A ratiometric fluorescence sensor based on lanthanide polymer collaborative with MOF-5 was developed. Fluorescein dyes were encapsulated into MOF-5 to provide built-in reference signal. The fluorescence sensor with built-in reference sensor improved detection selectivity and accuracy. Dual-response sensor offered multicolor variations for naked eyes.