Electrochemically controlled dissociation of dioxygen from a µ-peroxo cobalt(<scp>III</scp>) dimer

Cameron, John A.; Turner, Steven C.

doi:10.1039/dt9920003285

Cited by 13 publications

(17 citation statements)

References 17 publications

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“…Their I pa /I pc ratios increase with increasing sweep rate, converging to 1, suggesting quasireversible redox systems [61,62] (Table 3). These results are consistent with the electronic effects due to the substituents such as methyl and chlorine grafted on the H 2 Salen [22][23][24][25]47].…”

Section: Complexessupporting

confidence: 79%

“…An enhancement of the current peaks I pa and I pc is observed as previously mentioned for iron [63] or manganese complexes [22][23][24][25].…”

Section: Complexes With 1-or 2-methylimidazole the Addition Of An Ammentioning

confidence: 52%

“…However, for this reason, it is worth noting that such M II -oxygenated species are often usually reduced at the same potential of their formation [18,[21][22][23][24][25]63] (Figure 1). The peak-to-peak separation potentials (ΔE p ) between these two reduction waves (E pc1 , E pc2 ) were estimated to be about 100 mV.…”

Section: Complexes Without Axialmentioning

confidence: 99%

“…The ligands were prepared as previously reported in the literature [1,[22][23][24][25]. 60 mg (1 mmol) of diaminoethane in EtOH (8 cm 3 ) was added dropwise to 244 mg (2 mmol) of salicylaldehyde or its derivatives (EtOH, 12 cm 3 ).…”

Section: Syntheses Of the Ligandsmentioning

confidence: 99%

“…In some steps, molecular dioxygen fixation, water elimination, and peroxo high oxidation state metal (i.e., Fe IV ) and so forth, are involved In all cases, the active form of the coordinated iron ion is axially linked to a sulfur protein. Therefore, a large number of cytochrome P450 oxocomplexes, including the nonporphyrinic ligands such as Schiff base complexes, have been tested for their catalytic activity [13][14][15][16][17] and their electrocatalytic properties [8,[17][18][19][20][21][22][23][24][25][26]. Thus, new catalysts deriving from symmetrical tetradentate ruthenium-Schiff base complexes seem to be more and more attractive and efficient in catalysis [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization, and Electrochemical Study of Tetradentate Ruthenium‐Schiff Base Complexes: Dioxygen Activation with a Cytochrome P450 Model Using 1‐ or 2‐Methylimidazole as Axial Bases

Ourari

Khelafi

Aggoun

et al. 2011

Advances in Physical Chemistry

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Salicylaldehyde, 2-hydroxyacetophenone, and 3,5-dichlorosalicylaldehyde react with 1,2-diaminoethane to give three symmetrical Schiff bases H 2 L 1 , H 2 L 2 , and H 2 L 3 , respectively. With Ru(III) ions, these ligands lead to three complexes: Ru(III)ClL 1 (1), Ru(III)ClL 2 (2), and Ru(III)ClL 3 (3). The purity of these compounds was estimated by TLC technique and microanalysis while their structures were supported by the usual spectroscopic methods such as NMR, infrared, and electronic spectra. The cyclic voltammetry in acetonitrile showed irreversible waves for all three ligands. Under the same experimental conditions, it was proved that the ruthenium is coordinated in the three complexes 1, 2, and 3 showing quasireversible redox systems. The behavior of these complexes and their comparison with cytochrome P450 are investigated using them as catalysts in the presence of molecular oxygen with an apical nitrogen base: 1-or 2-methylimidazole.

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