The synthesis and characterization of a reference sample containing a distinct geometrical pattern of Cu2O (cuprite) are described. The sample is to be used as an assessment sample to evaluate a newly developed X-ray-excited optical luminescence (XEOL) microscope, built for non-destructive chemi...

A Cu2O thin film of cuprite crystal structure was fabricated via a decomposition reaction of water vapor generated by ultrasonic vibration. The thin film, which was grown on a soda-lime glass substrate at 530 °C, exhibited a prominent (111) preferred orientation with an optical bandgap of about...

Cuprite crystals, Cu2O and Ag2O, display a negative thermal expansion in a wide temperature range. This work shows, through a phenomenological approach, how the next-nearest-neighbors dynamics observed by EXAFS in both crystals [A. Sanson, F. Rocca, G. Dalba, P. Fornasini, R. Grisenti, M. Dapiag...

The interaction of freshly abraded surfaces of cuprite, Cu2O, with neutral or mildly alkaline aqueous solutions of diethyl or di-n-butyl dithiophosphate (DTP) has been investigated by means of conventional and synchrotron X-ray photoelectron spectroscopy and near-edge X-ray absorption fine struc...

A macroreticular, polystyrene/divinylbenzene anion exchanger (An) was used as the macromolecular support for Cu2O, whereby new hybrid ion exchangers (HIXs) were obtained. An/Cu2O was produced by transforming the Cu(OH)2 deposit introduced into its skeleton through a reaction with CuSO4 solution....

Dendrite growth is one of the most difficult problems hindering the application of Li metal anode for advanced high-energy-density lithium batteries. Regulating and guiding the harmless growth of lithium dendrites could be more effective and feasible than suppressing or blocking dendrite growth....

The paper reports the synthesis and characterization of cuprite/copper ferrite nanopowder composites. The composites were synthesized using co-precipitation with oxalates precursor route. The phase and microstructure of the powder samples were characterized using X-ray diffraction, BET surface a...

Cuprite is a difficult oxide to leach under acidic conditions (for the maximum extraction of 50%). In this research, the feasibility of leaching cuprite in an ammoniacal medium was studied. The working conditions addressed here were the liquid/solid ratio (120:1–400:1 mL/g), stirring speed (0–...

Chalcopyrite is the most abundant but also the most recalcitrant copper sulfide mineral in leaching processes. The reasons for its refractory character are passivation and/or its semi-conductive properties. In our study chalcopyrite was hydrometallurgically processed via chemical leaching, elect...

This paper summarizes the results of a study of the anodic characteristics of chalcopyrite in alkaline hydroxide and carbonate solutions. The cathodic reduction of oxygen, peroxide and hypochlorite have also been investigated as possible oxidants in a two-stage process for the heap leaching of c...

Unprecedented redox reactions of chromium oxide anions have been observed in the gas phase and investigated by mass spectrometric techniques and electronic structure calculations. The effective oxidizing and reducing power of chromium oxide anions is unravelled by sulfur dioxide: CrO4− and CrO2−...

ZrB2-SiC-Cr powder sintering at 1600 °C and its oxidation behavior at 1000–1500 °C in air were studied as a function of chromium content. It was shown that the relative density of the ZrB2-SiC ceramics increases with an increase in chromium content in the powdered mixture. This is related to ...

Chromium–containing vanadium tailings (CCVT), an industrial waste, were utilized to extract chromium efficiently by soda roasting–water leaching process and for the preparation of highly pure chromium oxide. The effect of extraction of chromium under different roasting and leaching conditions ...

This article describes an efficient and easy one-pot route for the synthesis of a wide range of selenol esters from acyl chloride with diselenides in the presence of indium metal. A variety of functional groups can be tolerated within the diorgano diselenide and the acyl chloride coupling partner.

In the present study we describe the synthetic strategies to gold(I)-selenolate complexes by the reaction of ortho-substituted diaryl diselenides and electrophilic anti-arthritic gold(I)-compounds in the presence of thiol such as PhSH. Diselenides react with thiol to generate a mixture of seleno...

The reaction of a lactone or an ester with dimethylaluminum chloride and N, O-dimethylhydroxylamine hydrochloride provided an efficient method for preparation of N-methoxy-N-methyl amide.

The molecular structures of O-methylhydroxylamine, N-methylhydroxylamine, N,O-dimethylhydroxylamine and N,N,O-trimethylhydroxylamine in the gas phase have been determined by electron diffraction. In each case, the principal conformer present had the anti conformation about the N-O bond, but the ...

Shiga toxins (Stxs) are major causative agents for bloody diarrhea and hemolytic uremic syndrome, a life-threatening disease in humans. No effective treatment is available. Early detection of Stxs in clinical samples is critical for disease management. As bacteria evolve, new Stxs are produced; ...

Vicarious nucleophilic substitution of hydrogen (VNS) with chloromethyl tolyl sulfone carbanion does not occur in 3-, 4- and 5-nitrosalicylaldehydes. Instead, nucleophilic addition to the carbonyl group takes place leading to 2-hydroxydihydrobenzofurans. The same reaction course is observed for ...

Dithiolated derivatives of 1,2-dicarba-closo-dodecaboranes are common ligands to be used for self-assembling monolayers, nanoparticles or transition complexes due to their robust molecular structure. The 9,12-dimercapto-1,2-dicarba-closo-dodecaborane, a derivative with two SH-groups in adjacent ...