scholarly journals Electrochemical properties of Cu4[PhN3C6H4N3(H)Ph]4(µ-O)2, a tetranuclear Copper(II) complex with 1-phenyltriazenido-2-phenyltriazene-benzene as ligand

2008 ◽  
Vol 33 (3) ◽  
pp. 43-46 ◽  
Author(s):  
A. Hermann ◽  
L. S. Silva ◽  
C. R. M. Peixoto ◽  
A. B. de Oliveira ◽  
J. Bordinhão ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Properties ◽  
Carbon Paste Electrode ◽  
Carbon Paste ◽  
Reversible Process ◽  
Cyclic Voltammetric ◽  
Tetranuclear Complex ◽  
O2 Concentration ◽  
Paste Electrode

Bis-(µ2-oxo)-tetrakis{[1-feniltriazene-1,3-diil)-2-(phenyltriazenil)benzene copper(II) is a tetranuclear complex which shows four Cu(II) ions coordinated by four 1,2-bis(phenyltriazene)benzene bridged ligands, with one diazoaminic deprotonated chain, and two O2- ligands. The complex reduces at E1/2 = -0.95 V vs Fc+/Fc, a two electrons process. Cyclic voltammetric and spectroelectrochemical studies showed a reversible process. When immobilized on carbon paste electrode, the complex electrocatalyses the reduction of O2 dissolved on aqueous solution at -0.3 V vs SCE potential. The obtained current shows linearity with O2 concentration.

Preconcentration of f-Elements from Aqueous Solution Utilizing a Modified Carbon Paste Electrode

2011 ◽  
Vol 83 (4) ◽  
pp. 1388-1393 ◽  
Author(s):  
Paul D. Schumacher ◽  
Kelly A. Fitzgerald ◽  
James O. Schenk ◽  
Sue B. Clark
Keyword(s):  
Aqueous Solution ◽  
Carbon Paste Electrode ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Paste Electrode

scholarly journals Voltammetric Determination of LSD with a Schiff Base – Chemically Modified Electrode in Aqueous Solution

2020 ◽  
Vol 9 (4) ◽  
pp. 440-458
Author(s):  
Maria Fernanda M. Ribeiro ◽  
Erica N. Oiye ◽  
Juliana M. T. Katayama ◽  
José W. C. Junior ◽  
Edward R. Dockal ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Forensic Science ◽  
Carbon Paste Electrode ◽  
Supporting Electrolyte ◽  
Modified Electrodes ◽  
Schiff Base Complexes ◽  
Carbon Paste ◽  
Simple Modification ◽  
Paste Electrode

In recent years, practical, inexpensive, and highly specific electroanalytical methods based on modified electrodes have been increasingly developed for forensic science. Simple modification of the carbon paste electrode with Schiff base complexes has become a promising strategy to detect and quantify narcotics. In this context, we aimed to develop voltammetric methods to quantify lysergic acid diethylamide (LSD) by using a carbon paste electrode modified with the complex [UO2(Ac-ophen)]·H2O. The use of an aqueous solution of KCl as supporting electrolyte makes the methodology less polluting, which contrasts with methods that still employ toxic solvents. The developed method for Differential Pulse Voltammetry provides a linear response at various concentrations of LSD and affords analytical curves with standard deviation, detection, and quantification limits around 2.45, 0.625, and 2.08 μmol L-1, respectively. The recovery values of 103 and 108% prove that the developed method is suitable for application in forensic science.

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