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A Fluoro-Chromogenic Sensor Based on Organic Molecular Framework for Cu2+ and F- in Aqueous Soluble DMSO
Veikko Uahengo1,2, Yan Zhang3, Bi Xiong3
1Department of Chemistry and Biochemistry, University of Namibia, 340 Mandume Ndemufayo Avenue, Windhoek, 9000, Namibia. vuahengo@unam.na.
Abstract:
The 2,2'-dinaphtholazobenzene molecular framework (P) was designed, synthesized and characterized. Its absorption and fluorescence properties revealed that P is a dual sensor for copper ions (Cu2+) and fluoride ions (F-) in DMSO. The colorimetric activities were clearly visible by naked eye upon the addition of the two ions. Fluorescence quenching and enhancement were observed when Cu2+ and F- ions were added respectively. Density Functional Theory (DFT) calculations were carried out to provide an insight into the interaction of guest ions (Cu2+ and F-) with P, and to explain how the molecular orbitals were affected. Graphical Abstract ᅟ.
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