Electrochemical Oxidation of Oxalate Ions in Aqueous Solutions

In this work, the electrochemical oxidation of a dye and an herbicide was investigated on non-active anodes in aqueous acidic medium in order to understand its effect to produce simultaneously hydrogen as eco-friendly energy alternative.

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The direct electrochemical synthesis of thiolato complexes of copper, silver, and gold; the molecular structure of [Cu(SC6H4CH3-o)(1,10-phenanthroline)]2•CH3CN

Canadian Journal of Chemistry ◽

10.1139/v87-224 ◽

1987 ◽

Vol 65 (6) ◽

pp. 1336-1342 ◽

Cited By ~ 60

Author(s):

Raj K. Chadha ◽

Rajesh Kumar ◽

Dennis G. Tuck

Keyword(s):

Molecular Structure ◽

Crystal Structure ◽

Aqueous Solutions ◽

Electrochemical Oxidation ◽

Copper Atom ◽

Electrochemical Synthesis ◽

High Yield ◽

Space Group ◽

Anodic Copper

The electrochemical oxidation of anodic copper or silver (= M) into non-aqueous solutions of RSH (R = alkyl, axyl) gives MISR as insoluble materials in high yield. In the presence of 1,10-phenanthroline (= L), the products are MISR•phen for M = Cu, but not Ag. Gold resists oxidation under such conditions, and AuISR (R = n-C4H9, C6H5) was obtained in only poor yield. The crystal structure of the solvated dimeric adduct [Cu(SC6H4CH3-o)•phen]2•CH3CN is triclinic, with a = 10.682(3) Å, b = 11.729(4) Å, c = 15.608(5) Å, α = 76.87(2)°, β = 76.35(2)°, γ = 68.07(2)°, V = 1742(1) Å3, Z = 2 and space group [Formula: see text]. The structure is based on a folded Cu2S2 ring with an unusually short Cu—Cu distance of 2.613(3) Å Each copper atom has CuS2N2 pseudo-tetrahedral stereochemistry, with Cu—S = 2.337 Å(av) and Cu—N = 2.10 Å(av).

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Mechanism of mediation of the electrochemical oxidation of K4Fe(CN)6 at poly-[tris(3-{ω-[4-(2,2′-bipyridyl)] alkyl}-thiophene)iron(II)]-film modified electrodes in aqueous solutions

Electrochimica Acta ◽

10.1016/0013-4686(96)00070-9 ◽

1996 ◽

Vol 41 (16) ◽

pp. 2563-2569 ◽

Cited By ~ 26

Author(s):

Jiaxiong Wang ◽

F.Richard Keene

Keyword(s):

Aqueous Solutions ◽

Electrochemical Oxidation ◽

Modified Electrodes

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Electrochemical Reaction Mechanism of Tiron in Acidic Aqueous Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.396-398.1730 ◽

2011 ◽

Vol 396-398 ◽

pp. 1730-1735 ◽

Cited By ~ 2

Author(s):

Yan Xu ◽

Yue Hua Wen ◽

Jie Cheng ◽

Gao Ping Cao ◽

Yu Sheng Yang

Keyword(s):

Aqueous Solution ◽

Cyclic Voltammetry ◽

Aqueous Solutions ◽

Electrochemical Oxidation ◽

Electrochemical Reaction ◽

Mass Spectrometric ◽

Acidic Aqueous Solution ◽

Ece Mechanism ◽

Flow Through ◽

Electro Oxidation

Electrochemical oxidation of tiron in the presence of H2O as a nucleophile in strongly acidic aqueous solutions was studied by cyclic voltammetry, controlled-voltage coulometry and spectrometric investigations. The mechanism of electrochemical reaction is confirmed by spectrophotometric tracing in various times of controlled-voltage coulometry. The voltammetric and spectrophotometric foundations indicate that a 1,4-Michael addition of H2O from its hydroxy moiety to the position 4 of electrochemically derived o-quinone is occurred. The electrochemical oxidation and reduction of tiron has been successfully accomplished by controlled-voltage coulometry in a redox flow-through type cell and the final electro-reduced product was characterized by spectrophotometric, 1H NMR and mass spectrometric methods. It is demonstrated that the electro-oxidation of tiron follows an ECE mechanism in acidic aqueous solutions, leading to formation of a new compound of para- benzoquinone derivative.

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