Kinetics of reaction of Fe(phen)32+ with hydrogen peroxide in neutral medium

Cyfert, M.

doi:10.1016/s0020-1693(00)90745-x

Cited by 14 publications

(7 citation statements)

References 10 publications

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“…Under in vitro , condition very reactive OH − radicals were formed through the Fenton reaction. The reversible reaction between Fe 2+ and 1,10-Phenathroline formed Fe(phen) 2 2+ , which react with H 2 O 2 and formed OH − free radicals [ 19 , 20 ]:

…”

Section: Resultsmentioning

confidence: 99%

Comparative Analysis of the Antioxidant Activity of Cassia fistula Extracts

Irshad

Zafaryab

Singh

et al. 2012

International Journal of Medicinal Chemistry

100

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Antioxidant potential of various extracts of Cassia fistula was determined by the DPPH, FRAP, Fe3+ reducing power, and hydrogen peroxide scavenging assay. Methanolic extracts of Cassia fistula showed the highest amount of phenolic and flavonoid content and reducing capacity, whereas hexane extracts exhibited the lowest level of reducing capacity. The order of antioxidant activity in Cassia fistula extracts displayed from higher to lower level as methanolic extracts of pulp, methanolic extracts of seed, hexane extracts of pulp, and hexane extracts of seed. The antioxidant potential of Cassia fistula extracts significantly correlated (P < 0.02) with the phenolic content of the methanolic extracts. Ascorbic acid taken as control showed highest antioxidant power in the present study.

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…”

Section: Resultsmentioning

confidence: 99%

Comparative Analysis of the Antioxidant Activity of Cassia fistula Extracts

Irshad

Zafaryab

Singh

et al. 2012

International Journal of Medicinal Chemistry

100

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show abstract

“…In the visible region the spectrum of the post-reaction mixture showed neither the ferriin band at about 600 nm nor ferroin band at 510 nm. Only the band intensity at 340-380 nm with a weak shoulder at 355 nm was observed, corresponding to dimeric species: [(phen)2FeOFe(phen)2I4+ or [(phen)2Fe(OH)2Fe(phen)zI4+ [9,11,19].…”

Section: Resultsmentioning

confidence: 99%

Oxidation of tris(1, 10-phenanthroline)iron(II) ion by iodate and periodate ions in neutral medium

Cyfert

Latko

Wawrzenczyk³

1996

Int. J. Chem. Kinet.

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“…A direct outer-sphere oxidation of H 2 O 2 by 3 would also be thermodynamically extremely unfavourable. 30 We note that in absence of excess phen, oxidants like chlorite, 31 peroxydisulfate, 32 H 2 O 2 33 react with [Fe(phen) 3 ] 2+ forming iron(III)-phen dimer, possibly 1, in neutral or acidic media. No such redox interaction between [Fe(phen) 3 ] 2+ and H 2 O 2 was evident in the observed kinetics carried out in presence of excess phen.…”

Section: Methodsmentioning

confidence: 98%

Mechanistic studies on oxidation of hydrogen peroxide by an oxo-bridged diiron complex in aqueous acidic media

2008

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A novel Raman spectroscopic model for the dinuclear iron site in ribonucleotide reductase and met-hemerythrin, [Fe2(micro-O)(phen)4(H2O)2]4+, 1, (phen = 1,10-phenanthroline) quantitatively oxidizes hydrogen peroxide to dioxygen via an inner-sphere electron transfer pathway. Although 1 deprotonates to form [Fe2(micro-O)(phen)4(H2O)(OH)]3+ (2) and [Fe2(micro-O)(phen)4(OH)2]2+ (3) in aqueous media, neither 2 nor 3 is reactive in oxidising H2O2. In the presence of excess phen, no phen-releasing equilibria from , and exist. Kinetic evidence of the generation of a (micro-1,2 peroxo)diiron(III,III) intermediate, prior to electron transfer, were obtained. Significant rate retardation in D2O media suggests proton coupled electron transfer (PCET) in the rate determining step of the title redox reaction.

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Kinetics of reaction of Fe(phen)32+ with hydrogen peroxide in neutral medium

Cited by 14 publications

References 10 publications

Comparative Analysis of the Antioxidant Activity of Cassia fistula Extracts

Comparative Analysis of the Antioxidant Activity of Cassia fistula Extracts

Oxidation of tris(1, 10-phenanthroline)iron(II) ion by iodate and periodate ions in neutral medium

Mechanistic studies on oxidation of hydrogen peroxide by an oxo-bridged diiron complex in aqueous acidic media

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