“High-Throughput” Evaluation of Polymer-Supported Triazolic Appendages for Metallic Cations Extraction

Abstract

Abstract:The aim of this work was to find and use a low-cost high-throughput method for a quick primary evaluation of several metal extraction by substituted piperazines appendages as chelatants grafted onto Merrifield polymer using click-chemistry by the copper (I)-catalyzed Huisgen's reaction (CuAAC) The polymers were tested for their efficiency to remove various metal ions from neutral aqueous solutions (13 cations , with good efficiencies. The values obtained here using less polymer, and a faster method, are in fair correspondence (average difference ±16%) with another published evaluation by atomic absorption spectroscopy (AAS).

Synthesis and Characterization of Polystyrene-Supported Piperazine-Substituted Triazoles by CuAAC and First Evaluation for Metal Ion Extraction

“…None of the polymers were able to extract Ni 2+ and Zn 2+ with good efficiencies, thus showing certain selectivity when compared to the other studied metallic ions. As an added proof, the extraction efficiencies were studied on 13 metallic cations by a “high-throughput” approach using conductometry [ 36 ]. Even if the method was less precise and sensitive, similar average affinities were found for Fe 3+ , Ni 2+ and Pb 2+ (13%–17% lower).…”

“…The polymers were then first tested for their ability to extract some metallic cations (Fe 3+ , Ni 2+ , Cu 2+ , Zn 2+ and Pb 2+ ) from neutral aqueous solutions by atomic absorption spectrometry. The polymers synthesized here were also used in parallel to elaborate a high-throughput evaluation of chelation by conductometry, which has been published elsewhere [ 36 ].…”