Electrochemical reduction of copper(II) salen at carbon cathodes in dimethylformamide

Samide, Michael J.; Peters, Dennis G.

doi:10.1016/s0022-0728(97)00460-9

Cited by 44 publications

(27 citation statements)

References 28 publications

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“…During the anodic potential scan, two irreversible oxidations with oxidation peak potentials, 0.22 V (peak V) and 1.00 V (peak VI), appear. Peaks II and III are metal-centered and are related to successive reductions of copper(II) to copper(I) and copper(I) to copper(0), while the other two reduction processes (peaks I and IV) and the irreversible oxidation peak VI are ligand-centered [19,21]. The cyclic voltammogram of the ligand (L-Cl) was also recorded in similar conditions (Fig.…”

Section: Electrochemistry Of the Complexesmentioning

confidence: 86%

“…As it can be seen, when the potential is scanned to more negative than that for peak III (voltammograms (a)-(c)), peak V is observed. The reduction of copper(I) of CuL 2 -Cl to copper(0) is responsible for peak III [20,21]. Because the copper(0) complex is unstable, the metal copper is deposited on the electrode surface.…”

Section: Electrochemistry Of the Complexesmentioning

confidence: 99%

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New insight into electrochemical behavior of copper complexes and their applications as bifunctional electrocatalysts for CO2 activation

Khoshro

Zare

Vafazadeh

2015

Journal of CO2 Utilization

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Section: Electrochemistry Of the Complexesmentioning

confidence: 86%

Section: Electrochemistry Of the Complexesmentioning

confidence: 99%

New insight into electrochemical behavior of copper complexes and their applications as bifunctional electrocatalysts for CO2 activation

Khoshro

Zare

Vafazadeh

2015

Journal of CO2 Utilization

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“…The cyclic voltammetric curves for the electrochemical oxidation of the studied M(II) complexes (Tables 3 and 4) [43,44]. The Co(BBE) complex exhibits a quasi-reversible oxidation of Co(II) to Co(III) (Fig.…”

Section: The Oxidation Of M(ii) To M(iii)mentioning

confidence: 99%

Synthesis and electrochemistry of M(II) N2O2 schiff base complexes: X-Ray structure of {Ni[Bis(3-chloroacetylacetone)ethylenediimine]}

Kianfara

Zargari

Khavasi

2010

JICS

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The synthesis and characterization of [Ni(BCE)] and [Cu(BCE)] (where BCE = bis(3-chloroacetylacetone)ethylenediimine) are described. The coordination geometry of [Ni(BCE)] was determined by X-ray crystallography. It was found to be planar and four coordinate in the solid state. The electrochemical properties of M(Chel), where M = Co(II), Ni(II) and Cu(II), and Chel = BAE (bis(acetylacetone)ethylenediimine), BBE = bis(benzoylacetone)ethylenediimine, BFE (bis(1,1,1-triflouroacetylacetone) ethylenediimine and BCE ligands were investigated in DMF and DMSO as solvents. The oxidation potentials changed from left to right in the periodic table in the trend: Co < Ni < Cu, while the reduction potentials changed according to the trend: Ni > Co > Cu. The oxidation potentials of M(II) to M(III) (M = Ni and Cu) increased according to the Schiff base ligands in the trend: BAE < BBE < BCE < BFE, while the reduction potentials followed a reverse trend: BAE > BBE > BCE > BFE. The oxidation potentials of M(II) to M(III) increased according to the solvent in the trend: DMSO < DMF.

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“…In the presence of Phe and Asp, Cu(II) has been found to undergo two cathodic peaks coupled with twostep two-electron transfer anodic reaction 6 . Copper(II) salen undergoes a three-step reduction at a glassy carbon cathode, in dimethylformamide containing tetramethylammonium tetrafluoroborate; the first peak is due to the reduction of copper(II) to copper(I), the second one is due to the reduction of copper(I) to copper metal, and the third voltammetric peak arises from reduction of the dianion salen 7 . It is established that at low values of pH, Cu(II) was reduced electrochemically via two-step reduction mechanism, while at high pH it proceeds via one-step process 8 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviour of copper(II) at a hanging mercury drop electrode

Al-Owais¹,

El-Hallag²

2016

ScienceAsia

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ABSTRACT:The electrochemical properties of Cu(II) ions were studied in 0.1 M KNO 3 at a hanging mercury drop electrode using cyclic and convolutive voltammetry in addition to chronoamperometry and chronopotentiometry methods. The Cu(II) ions consumed two electrons in two steps to form monovalent Cu(I) ions and Cu metal followed by a process of amalgam formation. The rates of both electron transfer steps were found to be quasi-reversible. Digital simulation was used to verify the electrode pathway and to determine and confirm the electrochemical parameters of the reductive process of bivalent Cu(II) ions.

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Electrochemical reduction of copper(II) salen at carbon cathodes in dimethylformamide

Cited by 44 publications

References 28 publications

New insight into electrochemical behavior of copper complexes and their applications as bifunctional electrocatalysts for CO2 activation

New insight into electrochemical behavior of copper complexes and their applications as bifunctional electrocatalysts for CO2 activation

Synthesis and electrochemistry of M(II) N2O2 schiff base complexes: X-Ray structure of {Ni[Bis(3-chloroacetylacetone)ethylenediimine]}

Electrochemical behaviour of copper(II) at a hanging mercury drop electrode

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