Electrochemical Sensor for Cu(II) Based on Carbon Nanotubes Functionalized with a Rationally Designed Schiff Base

Chemosensors, Journal Year: 2025, Volume and Issue: 13(2), P. 35 - 35

Published: Jan. 25, 2025

This work proposes a new strategy for the electrochemical quantification of Cu(II) using glassy carbon electrodes (GCEs) modified with nanohybrid multiwall nanotubes (MWCNTs) non-covalently functionalized rationally designed Schiff base containing different groups (SB-dBA). The principle sensing was complexation by that supports MWCNTs at open-circuit potential, followed reduction step −0.600 V and further linear sweep anodic stripping voltammetry (LSASV) in 0.200 M acetate buffer solution pH 5.00. range goes from 10 to 200 μg L−1, sensitivity (0.79 ± 0.07) µA L µg−1 (R2 = 0.991), detection limit 3.3 reproducibility 8.0% same (nine electrodes) 9.0% four nanohybrids. proposed sensor very selective even presence Pb(II), Fe(II), As(III), Cr(III), Cd(II), Hg(II), it successfully used water samples (tap, groundwater, river) without any pretreatment.

Language: Английский

Proton Relays in Molecular Catalysis for Hydrogen Evolution and Oxidation: Lessons From the Mimicry of Hydrogenases and Electrochemical Kinetic Analyses

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(52)

Published: Nov. 18, 2024

Abstract The active sites of metalloenzymes involved in small molecules activation often contain pendant bases that act as proton relay promoting proton‐coupled electron‐transfer processes. Here we focus on hydrogenases and the reactions they catalyze, i. e. hydrogen evolution oxidation reactions. After a short description these enzymes, review some various biomimetic bioinspired molecular systems relays. We then provide formal electrochemical framework required to decipher key role such enhance catalysis single direction discuss few for H 2 which quantitative kinetic data are available. finally highlight parameters reach bidirectional (both catalyzed) transition reversible catalyzed narrow potential range) well illustrate features from literature.

Language: Английский

Proton Relays in Molecular Catalysis for Hydrogen Evolution and Oxidation: Lessons From the Mimicry of Hydrogenases and Electrochemical Kinetic Analyses

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(52)

Published: Nov. 18, 2024

Abstract The active sites of metalloenzymes involved in small molecules activation often contain pendant bases that act as proton relay promoting proton‐coupled electron‐transfer processes. Here we focus on hydrogenases and the reactions they catalyze, i. e. hydrogen evolution oxidation reactions. After a short description these enzymes, review some various biomimetic bioinspired molecular systems relays. We then provide formal electrochemical framework required to decipher key role such enhance catalysis single direction discuss few for H 2 which quantitative kinetic data are available. finally highlight parameters reach bidirectional (both catalyzed) transition reversible catalyzed narrow potential range) well illustrate features from literature.

Language: Английский