Self‐Assembling of Redox‐Active Atrazine Poly(ethylenimine) Conjugates – Interfacial Electrochemical and Spectroscopic Characterization

Abstract

International audienceThin films of polymers tethered with both atrazine haptens and ferrocenyl (Fc) probes were formed on polycrystalline gold electrodes by taking advantage of the facile formation of self-assembled monolayers (SAMs) of thiolates. These films were characterized by polarization modulation Fourier transform infrared reflection – absorption spectrometry (PM-IRRAS), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry. The combination of these techniques gave a full insight into the structure and the binding mode of the polymers and provided useful quantitative information about both Fc entity and atrazine hapten surface density. This may open the way to a new type of immunosensor for atrazine monitoring

Renewable New Copper Complex Bulk‐Modified Carbon Paste Electrode: Preparation, Electrochemistry, and Electrocatalysis

“…The interest is motivated by their extensive potential applications in catalysis, photo-and electrochromic devices and material science [2,3]. Up to now, there are several kinds of method to fabricate CMEs according to the way in which materials are attached into the substrates: i) Langmuir -Blodgett (LB) [4,5]; ii) chemical vapor deposition (CVD) [6 -8]; iii) electrochemically assisted covalent bond [9 -11]; iv) selfassembling (SA) [12,13]; v) drop-casting [14 -16]; vi) bulk modification [17,18]; vii) adsorption [19 -21]; viii) sol-gel [22,23]; ix) underpotential deposition (UPD) [24,25], and x) electropolymerization [26,27] etc. Among of all, chemically modified carbon paste electrodes (CMCPE) have been widely used because of their low background current, easy fabrication and good performance [28 -31].…”

Electroactive Dipyrromethene‐Cu(II) Monolayers Deposited onto Gold Electrodes for Voltammetric Determination of Paracetamol

“…In addition, the same electron transfer theory concerning blocking SAMs might be applied to this system [9,10]. The most popular electroactive SAMs contain ferrocenes [11,12], ruthenium complexes [13,14], phthalocyanines [15 -17], metalloporphyrins [18,19], cytochromes [20] and atrazine [21], just to name a few.…”

Atrazine-Based Self-Assembled Monolayers and Their Interaction with Anti-Atrazine Antibody: Building of an Immunosensor

“…However, this small variation has a profound effect on its adsorption and photodegradation properties. , Large differences in the critical transition temperature of the compact film formation explain more efficient accumulation of atrazine in the groundwater compared to terbutylazine, without a possibility to efficiently undergo a photodegradation process. Ground water contamination by atrazine stimulated research interest in its detection in aqueous samples and development of highly sensitive immunosensors for atrazine monitoring. − Among them, the piezoelectric immunosensors showed great promise since they operate in a label-free mode. , Our previously reported carbonyl metallo immunoassay format for determination of atrazine in aqueous samples did not achieve the required sensitivity level 0.1 μg/L. In this work, we tried a different approach.…”