Tailoring copper (II) methacrylate‐containing copolymers and its use as electrode modifier agent in electroanalytical applications

Abstract

This work focuses on the synthesis of a new class of copolymer materials consisting of traditional vinyl monomers (essentially, vinyl acetate, ethyl acrylate, and methyl methacrylate) and copper (II) methacrylate (Cu(II)MA) intended to be used as surface modification agents in electrochemical quantifications of organic and inorganic analytes. Voltammetry assays showed that when deposited on glassy‐carbon electrode (GCE), Cu(II)MA‐based copolymers are very promising materials to be applied in electrochemical determinations, exhibiting high analytical signal in the oxidation and reduction peaks during quantification of potassium hexacyanoferrate (III) in comparison to a bare GCE, contributing to increase the effective electrode area. When employed for the determination of ascorbic acid, PVAcCu(II)MA/GCE exhibited performance similar to that of the bare GCE. Polymers characterizations showed that glass transition temperature of the Cu(II)MA‐based materials increased in approximately 10–20°C, as consequence of the copper present in molecular structure of the copolymer chains (bidentate bridging coordination mode). Energy‐dispersive X‐ray spectroscopy measurements of Cu(II)MA monomer and Cu(II)MA‐based copolymers showed strong characteristic peaks Kα and Kβ at 8.04 and 8.90 keV, respectively, with an average amount of copper of 99%. The performance of the Cu(II)MA‐based copolymers modified electrodes is strongly dependent on the amount of copper into the copolymer chains and consequently on the monomers conversion. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43202.

Evaluation of conversion during the synthesis of aluminum (III) methacrylate-based copolymers using Raman spectroscopy and multivariate curve resolution

“…The experimental results obtained in this work agree very well with the one reported by Ferreira et al [52], whose studies focused on synthesis of copper (II) methacrylate-based copolymers intended to be used as electrode modifier agent in electroanalytical applications. This behavior arises from the fact that a large amount of free radical initiator was employed.…”

“…The experimental procedure for copolymerization of organic-inorganic matrix is based on copolymerization reactions of vinyl monomers (vinyl acetate, ethyl acrylate and methyl methacrylate) and Al(III)MA carried out in a pseudo-dispersion polymerization process, similar to the one described by Ferreira et al [52] and the reader is encouraged to read this reference for more detailed information. The copolymerization reactions were performed in a 250 mL 5-necked glass reactor (Quickfit, England), equipped with a hotplate IKA RCT basic (IKA Works, Inc.), connected to an integrated temperature control using a Pt1000 temperature probe; overhead stirrer EUROSTAR POWER control-visc (IKA® Works, Inc., São Paulo, Brazil) linked to a helix-type impeller; and a reflux condenser, coupled to a cold water feed stream.…”