Ligand influence in electrocatalytic properties of Cu(ii) triazole complexes for hydrogen peroxide detection in aqueous media. Issue 5 (16th January 2023)

• Record Type: Journal Article
• Authors: Cortés, Paula; Castroagudín, Mariña; Kesternich, Víctor; Pérez-Fehrmann, Marcia; Carmona, Erico; Zaragoza, Guillermo; Vizcarra, Arnoldo; Hernández-Saravia, Lucas Patricio; Nelson, Ronald
• Is Part Of: Dalton transactions. Volume 52:Issue 5(2023)
• Page Start: 1476
• Page End: 1486
• Publication Date: 2023-01-16
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt03549a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : In this work, electrocatalytic changes of Cu(ii ) triazole complexes (Cu(L)2 ) resulting from inductive effects on the ligands were evaluated to fabricate a sensor for hydrogen peroxide (H2 O2 ) determination. Abstract : In this work, electrocatalytic changes of Cu(ii ) triazole complexes (Cu(L)2 ) resulting from inductive effects were evaluated to fabricate a sensor for hydrogen peroxide (H2 O2 ) determination. Three copper(ii ) complexes with electronically differentiated ligands were synthesized by slow diffusion method and characterized by X-ray crystallography, Fourier transformed infrared (FTIR), UV-Vis, scanning electron microscopy (SEM) and voltammetry cyclic (CV). Cu(L OMe )2 /GC, Cu(L Br )2 /GC and Cu(L NO2 )2 /GC sensors were then prepared. Under optimal conditions (pH = 11), the optimal sensor presented a response at −0.5 V, good linear range of 1–32 μM, reproducibility (1.7%), repeatability (1.2%), LOD of 0.0246 μM (S/N = 5), LOQ of 0.0747 μM (S/N = 5) and selectivity. Additionally, Cu(L NO2 )2 /GC sensor has been successfully applied in commercial substances, such as mouthwash, milk and tea.