Electrochemical molecularly imprinted polymers as material for pollutant detection

Abstract

New electrochemical molecularly imprinted polymers (e-MIPs) for benzo(a)pyrene (BaP) based on vinylferrocene (VFc) as redox tracer directly integrated into binding cavities during polymerization with crosslinker are reported. Impacts on the BaP detection are discussed according to: 1) the addition or no of 4-vinylpyridine (4VP) as comonomer, 2) the use of ethylene glycol dimethacrylate (EDMA) or divinylbenzene (DVB) as crosslinker. After characterization, these new e-MIPs and their corresponding non-imprinted polymers (e-NIPs) were incorporated in carbon paste electrodes and measurements were carried out by square wave voltammetry. All analyses revealed that e-MIP based on VFc and EDMA is the best to detect the template, with an imprinting factor of 7.3 and a LOD of 0.93 µmol/L of BaP.

Advanced Electrochemical Molecularly Imprinted Polymer as Sensor Interfaces

“…The limits of detection (LOD) based on the percentage of current intensity variation from three electrodes of e-MIP-VFc-EDMA was found to be 0.09 µM of BaP. The same approach was used to characterize e-MIP-VFc-4VP-EDMA for BaP ( Figure 3) prepared in an UVP HB-100 hybridation oven [4]. In CPE configuration, the 4-VP comonomer leads to a positive shift of around 100 mV of oxidation peak of ferrocenyl group compared to e-MIP-VFc-EDMA-CPE.…”

“…By this way, the detection of the target molecule is based on the electrochemical answer of the redox probe [2]. This new concept was first established for the detection of benzo[a]pyrene with vinylferrocene used as redox probe and as functional monomer [3,4]. More recently, we have extended this strategy to the detection of Bisphenol A from ferrocenylmethyl methacrylate as functional redox tracer.…”

MIPs for commercial application in low-cost sensors and assays – An overview of the current status quo

“…), and thermal methods (e.g. the so called “heat transfer method”) [ [47] , [48] , [49] , [50] , [51] , [52] , [53] ]. The combination of MIPs and their associated readout platforms has facilitated the analysis of many different mediums (e.g.…”

The Effect of Monomers on the Recognition Properties of Molecularly Imprinted Beads for Proto-hypericin and Proto-pseudohypericin

“…The resulted molecularly imprinted polymers (MIPs) are robust, exhibiting resistance to elevated temperatures and pressures, inertness to acids, bases and organic solvents, low production cost and ease of preparation as well as excellent recognition properties. These attributes make MIPs ideal for extensive application in solidphase extraction, biosensors, membranes, electrochemical sensing receptors and explosives, and also in green technologies such as supercritical fluid or microwave methods [16][17][18][19][20][21][22].…”