Water-soluble fluorescent chemosensor based on Schiff base derivative terminated PEG for highly efficient detection of Al3+ in pure aqueous media. Issue 40 (1st October 2020)

• Record Type: Journal Article
• Authors: Xu, Yuhang; Li, Leixuan; Bai, Liping; Tian, Shuhui; Zhang, Litian; Huang, Xiuyu; Zhu, Yan; Tao, Farong; Wang, Liping; Li, Guang
• Is Part Of: Tetrahedron letters. Volume 61:Issue 40(2020)
• Publication Date: 2020-10-01
• Subjects: Al3+ -- Fluorescent chemosensor -- Schiff base -- Water-soluble polymer; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2020.152335
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Highlights: A water-soluble fluorescent chemosensor PEGESB has been successfully synthesized. PEGESB exhibited high selectivity toward Al 3+ in pure aqueous solutions. An INHIBIT logic gate has been constructed based on the reversibility of PEGESB. Test papers were fabricated for on-site detection of Al 3+ in real water samples. Abstract: Schiff base derivative terminated PEG (PEGESB) was synthesized and applied as fluorescent chemosensor in pure aqueous media. PEGESB exhibited excellent selectivity and anti-interference ability for Al 3+ with naked eye fluorescence color change from colorless to bright cyan. The detection limit of PEGESB for Al 3+ was determined to be as low as 2.93 × 10 −9 M. PEGESB was stable and could effectively detect Al 3+ over a wide pH range from 5 to 10. PEGESB was proved to be a reversible fluorescent chemosensor upon alternate addition of Al 3+ and EDTA to PEGESB aqueous solution. The fluorescence response of PEGESB solution to Al 3+ and EDTA was applied to build an INHIBIT logic gate. In addition, test papers coated with PEGESB were facilely prepared for on-site sensing of Al 3+ in real water samples.