This article reviews investigations on the formation of inhomogeneous ferrous (FeII) and ferric (FeIII) oxides in aqueous solution. These globally abundant materials are important extensive fields research including corrosion steels, mineralogy, environmental remediation, biochemistry. Iron polycations consisting FeII FeIII ions bridged by hydroxyl groups oxyanions. Solution conditions such as ...

The tetradecanuclear FeIII pivalate nanocluster [Fe14O10(OH)₄(Piv)18], comprising a new type of metal oxide framework, has been solvothermally synthesized from a hexanuclear iron pivalate precursor in dichlormethane/acetonitrile solution. Magnetic measurements indicate the presence of very strong antiferromagnetic interactions in the cluster core.

The demethylation of histone H3 lysine 27 is catalyzed by the FeII/2-oxoglutarate-dependent demethylase from Class 6 (KDM6). KDM6 family (KDM6A/KDM6B) catalyzes trimethylated H3K27, which involves iron-oxo intermediates, including superoxo (FeIII−OO⋅−), Ferryl (FeIV=O), and hydroxo (FeIII−OH) complexes. study determines role second coordination sphere long-range interacting residues in KDM6′s c...

Structurally nanoengineered antimicrobial peptide polymers (SNAPPs) are an emerging class of antimicrobials against multidrug-resistant bacteria. Their encapsulation in particle carriers can improve their therapeutic efficacy by preventing degradation, reducing clearance, and enhancing intracellular delivery dosage to bacteria-infected host cells. Herein, two template-mediated strategies report...

We report the generation and characterization of an intermediate in a mutant form of the toluene/o-xylene monooxygenase hydroxylase component from Pseudomonas stutzeri OX1. The reaction of chemically reduced I100W variant in the presence of the coupling protein, ToMOD, with dioxygen was monitored by stopped-flow UV/visible spectroscopy. Rapid-freeze quench (RFQ) samples were also generated for ...

The association process between the tetracycline (TC) antibiotic molecule and Keplerate-type nanocluster polyoxometalate (POM) {Mo72Fe30} was studied in aqueous solution. novel supramolecular ensemble {Mo72Fe30}@TC12.5 produced, its composition structure were revealed by means of elemental analysis (C, N, H) vibrational spectroscopy (IR Raman). Based on spectral data, POM structure’s integrity ...

The structural characterization of de novo designed metalloproteins together with determination of chemical reactivity can provide a detailed understanding of the relationship between protein structure and functional properties. Toward this goal, we have prepared a series of cyclic peptides that bind to water-soluble metalloporphyrins (FeIII and CoIII). Neutral and positively charged histidine-...

The kinetics of thermal decomposition of AlIII -, CrIII -, FeIII ,CeIII and LaIII -alginate complexes have been studied using thermogravimetry (TG) and differential thermogravimetry (DTG) techniques in static air. However, the TG curves showed three distinct stages of weight loss, the DTG curves indicated the presence of a series of thermal peaks associated with the TG curves. The results revea...

Complex formation and liquid-liquid extraction were studied in systems containing iron(III), 4-nitrocatechol (4NC),tetrazolium salt (TZS), water and organic solvent. Three different TZS were used: 3-(4,5-dimethyl-2-thiazol)-2,5-diphenyl-2H-tetrazolium bromide (MTT), 3-(2-naphtyl)-2,5diphenyl-2H-tetrazolium chloride (Tetrazolium violet, TV) and 2-(4-iodophenyl)-3-(4-nitrophenyl)5-phenyl-2H-tetra...