Analogues of the iron-binding site in catechol 1,2-dioxygenase: iron(III) complexes of benzimidazole and pyridine-containing tridentate ligands
Analogues of the iron-binding site in catechol 1,2-dioxygenase: iron(III) complexes of benzimidazole and pyridine-containing tridentate ligands
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儿茶酚 1,2-双加氧酶中铁结合位点的类似物:苯并咪唑和含吡啶三齿配体的铁 (III) 复合物
DOI:
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
M. Palaniandavar
中科院分区:
文献类型:
--
作者:
R. Viswanathan;M. Palaniandavar
A series of iron(III) complexes of the type [FeLCl2]·H2O [HL =N-(pyridin-2-ylmethyl)salicylideneamine, (2-hydroxy-5-nitrobenzyl)(pyridin-2-ylmethyl)amine, (2-hydroxy-5-nitrobenzyl)(2-pyridin-2-ylethyl)amine, N-(2-imidazol-4-ylethyl)salicylideamine, N-(benzimidazole-2-ylmethyl)salicylaldimine, (benzimidazol-2-ylmethyl)(2-hydroxybenzyl)amine, or (benzimidazol-2-ylmethyl)(2-hydroxy-5-nitrobenzyl)amine] have been prepared. Also [FeLCl3]·H2O [L = bis(benzimidazol-2-ylmethyl)amine] has been isolated. These complexes have been characterised using IR, UV/VIS and EPR spectral and electrochemical techniques. Their interaction with a variety of mono- and bi-dentate heterocyclic bases as well as phenols has been investigated using electronic and EPR spectroscopy. Their interaction with 3,5-di-tert-butylcatechol (H2dbcat) and its anions reveals changes in the phenolate-to-iron(III) chargetransfer (c.t.) band similar to those for catechol dioxygenase–substrate complexes. The redox behaviour of the iron(III) complexes and their 1 : 1 adducts with dbcat anions generated in situ has been investigated in methanol. There is a linear correlation between the FeIII–FeII redox potential and the c.t. band energy of the complexes. All the complexes catalyse the oxidative cleavage of H2dbcat by molecular oxygen to yield cis,cis-muconic anhydride. The catalytic activity has been correlated with the FeIII–FeII as well as dbsq˙–H2dbcat (dbsq = 3,5-di-tert-butyl-1,2-benzosemiquinone) redox potentials of the dbcat adducts.
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DOI:
10.1016/s0021-9258(17)43071-7
发表时间:
1984-04
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. W. Whittaker;J. Lipscomb;T. Kent;E. Münck
通讯作者:
J. W. Whittaker;J. Lipscomb;T. Kent;E. Münck
影响因子:
2.9
作者:
AINSCOUGH, EW;BRODIE, AM;LOEHR, TM
通讯作者:
LOEHR, TM
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Walsh,TA;Ballou,DP;Mayer,R;QueJr,L
通讯作者:
QueJr,L
影响因子:
2.9
作者:
QueJr,L;Epstein,RM
通讯作者:
Epstein,RM
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Whittaker,JW;Lipscomb,JD
通讯作者:
Lipscomb,JD