scholarly journals Elaboration of carbon paste electrode containing pentadentate Nickel-(II) Schiff base complex: Application to electrochemical oxidation of thiosulfate in alkaline medium

2020 ◽  
Vol 13 (7) ◽  
pp. 6072-6083
Author(s):  
Walid Belbacha ◽  
Farid Naamoune ◽  
Hamza Bezzi ◽  
Nora Hellal ◽  
Larbi Zerroual ◽  
...  
2021 ◽  
pp. 100363
Author(s):  
Alex Soares Castro ◽  
Larissa Silva de Azevedo ◽  
Aline Thais Bruni ◽  
Matheus Manoel Teles de Menezes ◽  
Edward Ralph Dockal ◽  
...  

Author(s):  
Ana Beatriz da Silva ◽  
Alex Castro ◽  
Marcelo de Oliveira

In this article we have studied the electrochemical behavior of cocaine hydrochloride on the surface of a carbon paste electrode chemically modified with a Schiff base complex, namely [FeIII(salen)], [ZrOII(salen)], or [NiII(salen)], during voltametric analyses. Among the tested complexes, [NiII(salen)] provided amperometric and thermal stability and it was only degraded at temperatures above 400 ºC. To prepare the cocaine hydrochloride was used hydrochloric acid (HCl 1 mol L-1) after we tested the electrode, the HCl did not cause electrode passivation. In this study we can see that the voltammetric analyses revealed a satisfactory result, that the peak current obtained between 0.1 and 0.2 V (vs. Ag/AgCl) varied linearly with cocaine hydrochloride concentration and the average amperometric sensitivity, the LOD, and the LOQ were 5.5 μmol L-1, 0.945 μmol L-1, and 3.16 μmol L-1, respectively.


RSC Advances ◽  
2020 ◽  
Vol 10 (29) ◽  
pp. 17026-17036
Author(s):  
Saeed Rayati ◽  
Elham Khodaei ◽  
Parinaz Nafarieh ◽  
Majid Jafarian ◽  
Bahareh Elmi ◽  
...  

A Mn–Schiff base complex supported on silica-coated iron magnetic nanoparticles was used for the electrochemical oxidation of sulfides and alkenes.


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