Experimental and theoretical studies on electropolymerization of polar amino acids on platinum electrode

Alhedabi, Taleb; Cattey, Hélène; Roussel, Christophe; Blondeau-Pâtissier, Virginie; Gharbi, Tijani; Herlem, Guillaume

doi:10.1016/j.matchemphys.2016.10.021

Cited by 20 publications

(6 citation statements)

References 49 publications

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“…Recently, Polymers modified carbon paste electrodes prepared by electropolymerization have been widely used for the electrochemical determination of different analytes because the modified electrodes exhibited good stability, high sensitivity, reproducibility and selectivity [ 29 ]. Compared to other polymers, poly (amino acids) prepared by electropolymerization of amino acids have several advantages such as easy processibilty in aqueous solution which minimizes the use of toxic solvents, availability of various functional groups such as carboxylic (COOH), amino (NH 2 ) and hydroxyl (OH) for effective interaction with the target analyte, high stability and low-cost [ 9 , 30 , 32 ]. Recently, different poly (amino acids) have been reported for the electrochemical determination of various analytes [ 7 – 9 , 12 , 26 , 28 , 29 , 31 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitive and selective determination of vitamin B2 in non-alcoholic beverage and milk samples at poly (glutamic acid)/zinc oxide nanoparticles modified carbon paste electrode

2022

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Background The deficiency of vitamin B2 can lead to many health problems. Therefore, it is necessary to develop a sensitive, selective and fast method for the determination of vitamin B2 in food samples. In this work, a sensitive, selective and low-cost electrochemical sensor was developed using poly (glutamic acid) and Zinc oxide nanoparticles (ZnO NPs) for vitamin B2 in non-alcoholic beverage and milk samples. Methods The modification of the electrode surface was carried out by electropolymerization of glutamic acid on ZnO NPs–carbon paste electrode (ZnO NPS–CPE). The prepared electrodes were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X-Ray diffraction (XRD). CV and square wave voltammetry (SWV) were used to investigate the electrochemical behavior of vitamin B2 at the modified electrode. The effect of various parameters such as amount of ZnO NPs, polymerization cycle, concentration of the monomer, pH, scan rate and accumulation time were optimized to obtain maximum sensitivity at the modified electrode. Results The developed sensor showed high electrocatalytic activity towards vitamin B2. Under the optimized conditions, the developed sensor showed a linear response in the range 0.005–10 µM with a low detection limit of (LOD) 0.0007 ± 0.00001 µM and high sensitivity of 21.53 µA/µM. Conclusions A reproducible, repeatable, stable and selective sensor was successfully applied for the quantification of vitamin B2 in beverage and milk samples with acceptable recoveries in the range of 88–101%.

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Section: Introductionmentioning

confidence: 99%

Sensitive and selective determination of vitamin B2 in non-alcoholic beverage and milk samples at poly (glutamic acid)/zinc oxide nanoparticles modified carbon paste electrode

2022

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“…It is then necessary to look at alternative mechanisms. Electropolymerization of amino acids requires relatively high anodic potential (< +1 V vs. SHE) [70,71], which are not coherent with the electrotrophic hypothesis and the environmental conditions. However, extensive research has been performed on the "Clay theory".…”

Section: Polymerizationmentioning

confidence: 92%

Spark of Life: Role of electrotrophy in the emergence of Life

Pillot¹,

Santiago²,

Kerzenmacher³

et al. 2022

Preprint

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The emergence of Life has been a subject of intensive research for decades. Different approaches and different environmental “cradles” have been studied, from space to the deep-sea. Since the recent discovery of a natural electrical current through the deep-sea hydrothermal vent, a new energy source is considered for the transition from inorganic to organic. This energy source is used by modern microorganisms using a new trophic type, called electrotrophy. In this review, we draw the parallel between this metabolism and a new theory for the emergence of Life based on this electrical electron flow. Each step of the creation of Life is revised in the new light of this prebiotic electrochemical context, going from the evaluation of similar electrical current during the Hadean, the CO electroreduction into a prebiotic primordial soup, the production of proto-membranes, the energetic system inspired of the nitrate reduction, the proton gradient, and the transition to a planktonic proto-cell. Finally, this theory is compared to the two other theories in hydrothermal context, to assess its relevance to overcome the limitations of each one. Many critical factors that were limiting each theory can be overcome with the effect of the electrochemical reactions and the environmental changes produced.

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“…It is then necessary to look at alternative mechanisms. Electropolymerization of amino acids requires relatively high anodic potential (<+1 V vs. SHE) [ 80 , 81 ], which is not coherent with the electrotrophic hypothesis and the environmental conditions. However, extensive research has been performed on the “Clay theory”.…”

Section: From Co 2 Electroreduction To Autotrophic...mentioning

confidence: 99%

Spark of Life: Role of Electrotrophy in the Emergence of Life

Pillot

Santiago

Kerzenmacher

et al. 2023

Life

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The emergence of life has been a subject of intensive research for decades. Different approaches and different environmental “cradles” have been studied, from space to the deep sea. Since the recent discovery of a natural electrical current through deep-sea hydrothermal vents, a new energy source is considered for the transition from inorganic to organic. This energy source (electron donor) is used by modern microorganisms via a new trophic type, called electrotrophy. In this review, we draw a parallel between this metabolism and a new theory for the emergence of life based on this electrical electron flow. Each step of the creation of life is revised in the new light of this prebiotic electrochemical context, going from the evaluation of similar electrical current during the Hadean, the CO2 electroreduction into a prebiotic primordial soup, the production of proto-membranes, the energetic system inspired of the nitrate reduction, the proton gradient, and the transition to a planktonic proto-cell. Finally, this theory is compared to the two other theories in hydrothermal context to assess its relevance and overcome the limitations of each. Many critical factors that were limiting each theory can be overcome given the effect of electrochemical reactions and the environmental changes produced.

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Experimental and theoretical studies on electropolymerization of polar amino acids on platinum electrode

Cited by 20 publications

References 49 publications

Sensitive and selective determination of vitamin B2 in non-alcoholic beverage and milk samples at poly (glutamic acid)/zinc oxide nanoparticles modified carbon paste electrode

Sensitive and selective determination of vitamin B2 in non-alcoholic beverage and milk samples at poly (glutamic acid)/zinc oxide nanoparticles modified carbon paste electrode

Spark of Life: Role of electrotrophy in the emergence of Life

Spark of Life: Role of Electrotrophy in the Emergence of Life

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