A new tridentate fluorescent-colorimetric chemosensor for copper(II) ion. Issue 46 (15th November 2019)

• Record Type: Journal Article
• Authors: Zhao, Zhi-Xiang; Hu, Ze-Liang; Zhang, Xian-Tao; Liu, Qing-Xiang
• Is Part Of: Tetrahedron. Volume 75:Issue 46(2019)
• Publication Date: 2019-11-15
• Subjects: Tri-imidazolium -- Copper(II) ion -- Chemosensor -- Colorimetric -- Fluorescence; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2019.130675
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: A new tri-imidazolium salt, tris(4-(3-(2-((8-hydroxy-9, 10-dioxo-9′, 10′-dihydroanthracen-1-yl)oxy)ethyl)-1H-imidazole-3′-ium-1′-yl)phenyl)amine hexafluorophosphate was prepared and characterized. Particularly, the recognition performance of the tri-imidazolium salt for cations was investigated through fluorescence and ultraviolet titrations, MS, IR spectra and 1 H NMR titrations. The results indicated that the tri-imidazolium salt can distinguish effectively copper(II) ion from other cations by the changes of spectroscopy and colour (from yellow to orange under sunlight). Furthermore, the tri-imidazolium salt was also used in detecting Cu 2+ through employing smartphone with the computed detection limit down to 0.51 μM. Graphical abstract: Image 1 Highlights: One bis-imidazolium salt 1 has been prepared and characterized. The structure of 1 was confirmed through 1 H NMR titrations, HRMS and elemental analyses. One bis-imidazolium salt 1 has been prepared. Compound 1 can discriminate from Cu 2+ via fluorescence and UV methods. The K SV and K values of 1 × 10 5 M −1 and 2.8 × 10 5 M −1 for 1 ·Cu 2+ . The limit of detection (LOD) was determined to be 0.049 μM.