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Synthesis and binding studies of a novel highly selective Ag(I) ligand.pdf (753.13 kB)

Synthesis and Binding Studies of a Novel Highly Selective Ag(I) Ligand

submitted on 10.03.2020 and posted on 11.03.2020 by Abiodun Aderibigbe, Andrew J. Clark
Ligands bearing S- and N- donors are an important class of extractants with demonstrated efficiency and selectivity for Ag+ extraction over metals with similar chemistries. However, the synthesis of some of these ligands can be complicated and low yielding. Here, we report the synthesis of a novel ligand - N-(2-((4-vinylbenzyl)thio)ethyl)acetamide, over two simple steps and in a good yield. The extractant was observed to demonstrate excellent selectivity for Ag+, extracting only Ag+ from an aqueous solution also containing Cu2+ and Pb2+. Moderate extraction efficiencies of 36 % for Ag+ and 0% each for Cu2+ and Pb2+ were observed. From mass spectrometry and proton NMR titration data, the extractant was found to form both the 1:1 and 1:2 (Ag+:ligand) complexes with Ag+ indicating that ligand forms bent linear and tetrahedral coordination complexes with Ag+. Overall, the results indicate that the novel amide-based ligand is highly selective for Ag+ removal from aqueous solutions containing Cu2+ and Pb2+. These results indicate the ligand could be easily synthesized and applied for selective silver recovery from low grade ores.


Email Address of Submitting Author


University of Warwick


United Kingdom

ORCID For Submitting Author


Declaration of Conflict of Interest

The authors declare no conflict of interest


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