Abstract
In this paper the chemical sensing ability of aromatic salicylideneaniline Schiff-base (ASASB), synthesized solvent-free mechanochemically and characterized, was assessed via UV-Vis spectroscopic method together with naked-eye detection. Metal ions in aqueous medium from s, p and d-block elements were investigated based on chelation-induced colorimetric chemosensing. The result revealed that ASASB can be used as a new colorimetric chemosensor for selective detection of Cu 2+ ion in aqueous solution. KEY WORDS : Metal ion, Schiff-base, Colorimetric chemosensor, Mechanochemistry Bull. Chem. Soc. Ethiop. 2017 , 31(1), 31-38. DOI: http://dx.doi.org/10.4314/bcse.v31i1.3
Highlights
Metals are indispensable for life, as they are involved in many fundamental biological processes, including osmotic regulation, catalysis, metabolism, biomineralization, and signaling [1]
It is worth mentioning that upon Schiff-base formation the signal of the azomethine hydrogen appears up field relative to the original signal of the aldehyde hydrogen (-CH=O)
The FT-IR and ESI-MS results were further confirmed the successful conversion of aldehyde and primary aromatic amine to the corresponding Schiff base
Summary
Metals are indispensable for life, as they are involved in many fundamental biological processes, including osmotic regulation, catalysis, metabolism, biomineralization, and signaling [1]. Still there has been an interest in the improvement of practical use of colorimetric chemosensors, such as the lack of aqueous solubility, designing of sensor toward specific metal ion detection, development of sensor probe via green synthesis protocol etc. We have developed a new ASASB ligand having ON chelating system, synthesized solvent-free mechanochemically, as a new colorimetric chemosensor for selective recognition of Cu2+ ion in aqueous solution.
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