16 Result(s)
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Article
Miquel Costas
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Morbidly obese subjects show increased serum sulfide in proportion to fat mass
The importance of hydrogen sulfide is increasingly recognized in the pathophysiology of obesity and type 2 diabetes in animal models. Very few studies have evaluated circulating sulfides in humans, with discre...
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Open AccessChemoselectivity in the Oxidation of Cycloalkenes with a Non-Heme Iron(IV)-Oxo-Chloride Complex: Epoxidation vs. Hydroxylation Selectivity
We report and analyze chemoselectivity in the gas phase reactions of cycloalkenes (cyclohexene, cycloheptene, cis-cyclooctene, 1,4-cyclohexadiene) with a non-heme iron(IV)-oxo complex [(PyTACN)Fe(O)(Cl)]+, which ...
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Open AccessCharacterized cis-FeV(O)(OH) intermediate mimics enzymatic oxidations in the gas phase
FeV(O)(OH) species have long been proposed to play a key role in a wide range of biomimetic and enzymatic oxidations, including as intermediates in arene dihydroxylation catalyzed by Rieske oxygenases. However, t...
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Oxidation of alkane and alkene moieties with biologically inspired nonheme iron catalysts and hydrogen peroxide: from free radicals to stereoselective transformations
The selective oxidation of hydrocarbons is a challenging reaction for synthetic chemists, but common in nature. Iron oxygenases activate the O–O bond of dioxygen to perform oxidation of alkane and alkenes moie...
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Water oxidation: High five iron
The oxidation of water is essential to the sustainable production of fuels using sunlight or electricity, but designing active, stable and earth-abundant catalysts for the reaction is challenging. Now, a compl...
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Erratum: Evidence for an oxygen evolving iron–oxo–cerium intermediate in iron-catalysed water oxidation
Nature Communications 6: Article number:5865 (2015); Published 22 January 2015; Updated 12 February 2015. The affiliation details for Laura Gómez, Scott T. Kleespies and Lawrence Que Jr are incorrect in this A...
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Evidence for an oxygen evolving iron–oxo–cerium intermediate in iron-catalysed water oxidation
The non-haem iron complex α-[FeII(CF3SO3)2(mcp)] (mcp=(N,N′-dimethyl-N,N′-bis(2-pyridylmethyl)-1,2-cis-diaminocyclohexane) reacts with CeIV to oxidize water to O2, representing an iron-based functional model for ...
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Sponge-like molecular cage for purification of fullerenes
Since fullerenes are available in macroscopic quantities from fullerene soot, large efforts have been geared toward designing efficient strategies to obtain highly pure fullerenes, which can be subsequently ap...
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Direct observation of two-electron Ag(I)/Ag(III) redox cycles in coupling catalysis
Silver is extensively used in homogeneous catalysis for organic synthesis owing to its Lewis acidity, and as a powerful one-electron oxidant. However, two-electron redox catalytic cycles, which are most common...
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Discussion of an open problem
Quantum mechanics rears its head in many places and one of them is inorganic chemistry, where the electronic spin associated with unpaired electrons has a profound influence. This was the topic of the 2012 CEC...
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Observation of Fe(V)=O using variable-temperature mass spectrometry and its enzyme-like C–H and C=C oxidation reactions
Oxo-transfer chemistry mediated by iron underpins many biological processes and today is emerging as synthetically very important for the catalytic oxidation of C–H and C=C moieties that are hard to activate c...
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Efficient water oxidation catalysts based on readily available iron coordination complexes
Water oxidation catalysis constitutes the bottleneck for the development of energy-conversion schemes based on sunlight. To date, state-of-the-art homogeneous water oxidation catalysis is performed efficiently...
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Erratum to Oxoiron(IV) complexes of the tris(2-pyridylmethyl)amine ligand family: effect of pyridine α-substituents
Erratum to: J Biol Inorg Chem 11:272–276 DOI 10.1007/s00775-006-0089-6
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Oxoiron(IV) complexes of the tris(2-pyridylmethyl)amine ligand family: effect of pyridine α-substituents
The oxoiron(IV) complexes of two 6-substituted tris(2-pyridylmethyl)amine ligand derivatives have been generated and characterized with respect to their spectroscopic and reactivity properties. The introductio...
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4-Nitrocatechol as a probe of a Mn(II)-dependent extradiol-cleaving catechol dioxygenase (MndD): comparison with relevant Fe(II) and Mn(II) model complexes
Mn(II)-dependent 3,4-dihydroxyphenylacetate 2,3-dioxygenase (MndD) is an extradiol-cleaving catechol dioxygenase from Arthrobacter globiformis that has 82% sequence identity to and cleaves the same substrate (3,...
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A nonheme iron(II) complex that models the redox cycle of lipoxygenase
The air-stable complex [Fe(6-Me3-TPA)(O2CAr)]+ [1; 6-Me3-TPA=tris(6-methyl-2-pyridylmethyl)amine] has been synthesized as a model for the iron(II) site of lipoxygenase. This iron(II) complex reacts with 0.5 equi...
