Efficient collection of perrhenate anions from water using poly(pyridinium salts) via pyrylium mediated transformation

Abstract

Poly(pyridinium salts) (PPSs) with positive charges on the backbones were designed and synthesized from the transformation of bispyrylium salts. Such materials exhibited good uptake capacity for rhenium capture from water, and excellent selectivity of ReO₄⁻ from competing anions. Furthermore, the advantages of facile synthesis and large-scale preparation make this material promising for practical use in industry.