The C2-Symmetry Colorimetric Dye Based on a Thiosemicarbazone Derivative and its Cadmium Complex for Detecting Heavy Metal Cations (Ni2+, Co2+, Cd2+, and Cu2+) Collectively, in DMF

Autor: Phillipus N Hishimone, Eunike N. Hamukwaya, Veikko Uahengo
Rok vydání: 2021
Předmět:
Zdroj: Journal of Fluorescence. 31:999-1008
ISSN: 1573-4994
1053-0509
DOI: 10.1007/s10895-021-02734-z
Popis: The field of chemosensing has been experiencing an exponential expansion in recent times, due to increased demands for simpler and user-friendly analytical techniques, in order to combat and confront the challenges of industrial pollutions in the 21 st century. Metal complex-based chemosensors have received little attention while exhibiting excellent sensing properties, comparing to their organic counterparts. Thus, a thiosemicarbazone-based ( H ) and its cadmium complex ( P ) were synthesized, characterized and their photophysical and chemosensing properties were investigated in DMF solvent. The addition of molar equivalents of selected cations (of nitrates or chloride salts) to H and P , produced visually detectable colour changes as well as remarkable spectral shifts. Explicitly, the two probes ( H and P ) were able to collectively discriminate heavy metal cations such as Cd 2+ , Co 2+ , Zn 2+ , Cu 2+ , Ni 2+, and Ag + , both in DMF, among all other heavy metal cations tested. None of the anions could be detected by H or P , even when the tetrabutylammonium salts (TBAs) were used, the action presumably ascribed to the solvent effect. Thus, H and P can be used to selectively and sensitively detect the presence of heavy metal cations, via naked-eye detectable colour changes in an aqueous soluble solvent such as DMF.
Databáze: OpenAIRE
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