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The effect of pyrophosphate, tripolyphosphate and ATP on the rate of the Fenton reaction.

Abstract：

:It has been recently reported that pyrophosphate, tri-polyphosphate, ATP and analogous ligands considerably decrease the yield of hydroxyl radicals by the Fenton reaction under conditions where [H(2)O(2)]>[Fe(II)L(n)]. It was suggested that this effect is due to the slowing down of the Fenton reaction by these ligands. This suggestion seemed surprising as polyphosphate ligands stabilize Fe(III). Indeed, a kinetic study points out that these ligands accelerate the rate of the Fenton reaction by several orders of magnitude. Thus it is suggested that the effect of the ligands on the yield of the hydroxyl radicals is due to the stabilization of the Fe(III) complexes which slows down, or inhibits, their reduction by the radicals formed in the system and thus decreases the overall yield of hydroxyl radicals.

journal_name

J Inorg Biochem

journal_title

Journal of inorganic biochemistry

authors

Rachmilovich-Calis S,Masarwa A,Meyerstein N,Meyerstein D

doi

10.1016/j.jinorgbio.2011.01.009

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

669-74

issue

5

eissn

0162-0134

issn

1873-3344

pii

S0162-0134(11)00019-5

journal_volume

105

pub_type

杂志文章

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