Efficient detection of Cu2+, Fe3+ and Cr2O72− in aqueous solution using two new Co(II) luminescent metal-organic frameworks. (1st March 2023)

• Record Type: Journal Article
• Authors: Ru, Jing; Wang, Ying-Xue; Shi, Yi-Xuan; Guo, Qiang; Wang, Yan-Lan; Ma, Chun-Lin
• Is Part Of: Polyhedron. Volume 232(2023)
• Publication Date: 2023-03-01
• Subjects: Cobalt metal-organic frameworks -- Tris(3′-F-4′-carboxybiphenyl)amine -- X-ray diffraction -- Luminescence sensing -- Quenching; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2022.116278
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: In this work, two new three-dimensional Co(II) metal-organic frameworks (MOFs), {[Co2 (TFBA)(4, 4′-bpy)H2 O]·5DMF·7H2 O}n (CoMOF-1 ) and {[Co2 (TFBA)(bpen)H2 O] ·6DMF·6H2 O }n (CoMOF-2 ) (H3 TFBA = tris(3′-F-4′-carb oxybiphenyl)amine, 4, 4′-bpy = 4, 4′-bipyridine, bpen = trans -1, 2-bis(4-pyridyl)ethene) were constructed by a solvothermal method. Both CoMOF-1 and CoMOF-2 displayed similar 3D frameworks with the 2, 3, 4, 6-c net topology based on dinuclear [Co2 O8 ] units. The powder X-ray diffraction (PXRD) results and thermogravimetric analysis (TGA) proved that CoMOF-1 and CoMOF-2 have good structural and thermal stability. As we expected, the luminescence sensing investigations demonstrated that CoMOF-1 and CoMOF-2 could be considered as promising luminescent sensors toward Cu 2+, Fe 3+ and Cr2 O7 2− ions via a quenching effect, with high sensitivity and good reusability. Additionally, the possible luminescent quenching reasons were systematically studied by UV spectroscopy, X-ray photoelectron spectroscopy (XPS), IR spectra and PXRD patterns. Abstract: In this work, two new three-dimensional Co(II) metal-organic frameworks (MOFs), {[Co2 (TFBA)(4, 4′-bpy)H2 O]·5DMF·7H2 O}n (CoMOF-1 ) and {[Co2 (TFBA)(bpen)H2 O] ·6DMF·6H2 O }n (CoMOF-2 ) (H3 TFBA = tris(3′-F-4′-carb oxybiphenyl)amine, 4, 4′-bpy = 4, 4′-bipyridine, bpen = trans -1, 2-bis(4-pyridyl)ethene) were constructed by a solvothermal method. Both CoMOF-1 and CoMOF-2 displayed similar 3D frameworks with the 2, 3, 4, 6-c net topology based on dinuclear [Co2 O8 ] units. The powder X-ray diffraction (PXRD) results and thermogravimetric analysis (TGA) proved that CoMOF-1 and CoMOF-2 have good structural and thermal stability. As we expected, the luminescence sensing investigations demonstrated that CoMOF-1 and CoMOF-2 could be considered as promising luminescent sensors toward Cu 2+, Fe 3+ and Cr2 O7 2− ions via a quenching effect, with high sensitivity and good reusability. Additionally, the possible luminescent quenching reasons were systematically studied by UV spectroscopy, X-ray photoelectron spectroscopy (XPS), IR spectra and PXRD patterns.