Functionalization of polypyrroles with acids and β-diketones as complexing groups. Part 1: electrochemical synthesis and properties

Abstract

The synthesis of pyrroles functionalized by complexing groups such as acetylacetone, dibenzoylmethane or carboxylic acids is described, as well as their electrooxidation into functionalized polypyrroles. We have studied the behavior of poly(functionalized pyrrole) films in the presence of Li⁺, Ni²⁺ and Co²⁺ cations by cyclic voltammetry (CV) and infrared (IR) spectroscopy. The electrochemical response under various conditions differs with the nature of the complexing group. We have also demonstrated the possibility to electrochemically generate copolymers with pyrrole and each functionalized pyrrole. The proportion of functional groups in the copolymers was estimated by following the peak potential dependence in cyclic voltammetry and was confirmed by IR spectroscopy.