The title compound, [Fe3(C11H11N2O5)2Cl3(C2H6OS)3]2·7C2H6OS·2H2O, was isolated accidentally from an Fe0-NiCl2·6H2O-H3L-TEA-DMSO system [where H3L is the product of the condensation between p-nitro-salicyl-aldehyde and 2-amino-2-methyl-propane-1,3-diol and dimethyl sulfoxide (DMSO), and TEA is triethylamine]. The structure is based on a trinuclear {Fe3(μ-O)4} core, with an angular arrangement of...

Resumo Materiais baseados em oxi-hidróxidos mistos de alumínio e ferro (III) foram preparados pela síntese hidrotérmica a partir da ureia, sais nitrato ou cloreto diferentes razões molares Al3+:Fe3+. Foram avaliadas as propriedades estruturais, morfológicas térmicas dos materiais. As misturas nitratos Al3+ Fe3+ conduziram à formação hematita enquanto que nos materiais obtidos cloretos, fases cr...

Syntheses and magnetic structural characterization of hexa-iron complexes derivatized salicylaldoximes are discussed. Complexation Fe(BF4)2·6H2O with each ligand (H2L1 H4L2) in a methanolic-pyridine solution resulted compounds (C1 C2, respectively), which contain two near-parallel metal triangles [Fe3–μ3-O], linked by six fluoride bridges stabilized hydrogen-bonded proton between the μ3-O group...

In this study, highly ordered mesoporous silica material (SBA-15) functionalized with Diethyl 2 - (9 -fluorenyl) malonate as a flourophore is reported. The anchoring of flourophores to the hydroxyl group on SBA-15 surface was done with post synthesis method. The obtained materials were characterized by small and wide angle X-ray diffraction, N2 adsorption–desorption, Fourier transform infrared ...

The spectroscopic properties of Fe3+ in tetrahedral d-sites of GGG and the effect of co-doping with ~ m 3 + are investigated. It is thus shown that a very efficient energy transfer from ~ e 3 + (d) to ~ m ~ + takes place due to a good superposition of Fe emission and Tm 3 ~ 6 > 3 ~ 4 absorption spectra and due to a favorable packing of the d-sites around the dodecahedral site occupied by Tm. It...

UNLABELLED Iron and copper toxicity has been presumed to involve the formation of hydroxyl radical (*OH) from H2O2 in the Fenton reaction. The aim of this study was to verify that Fe2+-O2 and Cu+-O2 chemistry is capable of generating *OH in the quasi physiological environment of Krebs-Henseleit buffer (KH), and to compare the ability of the Fe2+-O2 system and of the Fenton system (Fe2+ + H2O2) ...

background fenton (fe2+ and h2o2) and modified fenton (fe3+ and h2o2) are two popular methods used in advanced oxidation processes (aop) and degradation of persistent organic pollutants (pops), such as dye compounds. in these processes, fe2+ and fe3+ as catalysts and h2o2 as the oxidizing agent are added to the reactor. objectives the aim of the current study is to assess the abovementioned met...

The redox cycle of 2,5-dimethoxybenzoquinone (2,5-DMBQ) is proposed as a source of reducing equivalent for the regeneration of Fe2+ and H2O2 in brown rot fungal decay of wood. Oxalate has also been proposed to be the physiological iron reductant. We characterized the effect of pH and oxalate on the 2,5-DMBQ-driven Fenton chemistry and on Fe3+ reduction and oxidation. Hydroxyl radical formation ...

Iron-sufficient cells of the green alga Scenedesmus incrassatulus Bohl, R-83 released in the medium strong and weak Fe3+-complexing agents in response to freshly added Fe3+. Applied in the dark, photosynthetic inhibitor 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) inhibited ferric reduction from ferric-EDTA or ferricyanide more than the chelator release. Fedeficient cells and DCMU-treated Fe-...