Publisher SummaryThis chapter provides a critical review of the preparation, characterization (which is often incomplete), and properties of cyanide complexes of the transition metals. It focuses on structural, thermodynamic, and kinetic data. Two prominent features of transition metal cyanide c...

Evidence is presented for the preparation of a macrocyclic nickel(II) complex containing a tetrasulfide chelate ring. Preparation of the tetrasulfide ring was via a template mechanism by reacting (1, 10-dithia-4,7-diaza-5, 6-dimethyldeca-4,6-diene)nickel(II) with sulfur monochloride. Analysis of...

Single-crystal and powder X-ray diffraction data, thermal gravimetric analysis, and infrared spectral data are present for PrKFe(CN)6 · 4H2O. The crystal structure has been determined by single-crystal diffractometry and refined by the least-squares method to yield R = 0.0149 and Rw = 0.0155. T...

Activated carbon cloth was impregnated with the formates, acetates, and propanoates of manganese, cobalt, nickel, copper, and zinc. Impregnated cloth samples were challenged with 1 L min−1 2 mg L−1 HCN in air in a test rig. The effluent gas was sampled every 2 min, the sample separated on a gas ...

Activated carbon cloth is impregnated by dipping in solutions of cobalt acetate or nickel acetate to give a range of loadings. Prepared cloths were used to form filter beds, 20 layers thick, which were exposed to hydrogen cyanide (HCN)-laden air. Challenge concentration was 2 mg L−1 HCN in air a...

The new ligands 2-hydroxy-5-methyl-3-(2-aryldiazenyl)phenylimino)methyl)benzaldehyde HLa, 2, and ethyl-2-cyano-3-(2-hydroxy-5-methyl-3-(-(2-aryldiazenyl)phenylimino)methyl)phenyl)acrylate, HLb, 3, [where aryl is phenyl for HLa1, 2a, and HLb1, 3a; p-methyl phenyl for HLa2, 2b, and HLb2; 3b, and p...

The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abbreviated as M–Ni–etim, M = Mn(II), Fe(II) or Co(II); etim = 1-ethylimidazole, C5H8N2) were prepared in powder form and characterized by FT-IR and Raman spectroscopy, powder X-ray diffraction (PXRD)...

Two new bis(μ-tetrazolato-NN′) bridged dinuclear nickel(II) Schiff base complexes [Ni2L12(PTZ)2]·2(CH3)2SO·2.69H2O (1) and 2[Ni2L22(PTZ)2]·3H2O (2) (HL1 and HL2 are Schiff bases, HL1 = 2-((2-(dimethylamino)ethylimino)methyl)phenol, HL2 = 2-((2-(methylamino)ethylimino)methyl)-6-methoxyphenol...

Ion foam flotation of neodymium (Nd3+) was studied using a pH-sensitive surfactant, the nonaoxyethylene oleylether carboxilic acid, which has the peculiarity of remaining water soluble in the presence of multivalent cations. The flotation efficiency factors were determined as a function of pH an...

The first organically templated neodymium sulfate has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction analysis. [C2N2H10]1.5[Nd(SO4)3(H2O)]·2H2O crystallizes in the monoclinic space group P21/c with crystal data a=6.5896(5)Å, b=26.539(3)Å, c=9....

The rare earth elements neodymium and dysprosium were separated and recovered from NdFeB permanent magnet swarf by hydrometallurgical route. The magnet swarf was leached with HCl after crushing and grinding, and from the leach liquor, Nd and Dy were separated by solvent extraction using NaCyanex...

Sustainable management strategies for securing long–term supply of rare earth elements is priority for Europe due to a complex and interlinked production chain and its dependence on Chinese export. Among rare earth elements, neodymium captured most attention due to its essential role in a wide ...

The solvent extraction of yttrium and neodymium from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. Effect of contact time, pH, sulfate concentration, and extractant concentration were investigated using synthetic and actual PLS systems. St...

This study proposes a novel leaching methodology to recover neodymium from scrap magnet using ammonium persulfate ((NH4)2S2O8) solutions. The NdFeB magnets from obsolete Hard-Disk-Drives were physically treated by thermal demagnetization (400 °C, 45 min) and mechanical crushing (98% of NdFeB ma...

Most of the Hybrid Tea roses that are sold as cut flowers are non-scented, despite the long-standing interest of the perfume industry to rose scent. In the absence of comprehensive knowledge on the genetic and biochemistry of volatile biosynthesis in roses, we decided to characterize a Hybrid Te...

Endogenous cell metabolism and chemical reactions can induce oxidative DNA damage, which is involved in the development of different diseases. In this work, a label-free electrochemiluminescence (ECL) assay was proposed for the sensitive detection of oxidative DNA damage in an assembled DNA film...

We report a hydrogen-evolution dimerization of styrenes via the synergistic merger of Acr+-Mes photocatalyst and cobaloxime proton reduction catalysts. By utilizing this dual catalyst system, 1,2-dihydro-1-arylnaphthalene derivatives can be directly constructed from commercially available styren...

Roses are widely appreciated for the appearance of their flowers and for their fragrance. This latter character results from the combination of different odorant molecules among which monoterpenes are often prevalent constituents. In this study, we report the cloning and characterization of thre...

This study aimed to develop nanocapsules containing ketoprofen using rose hip oil (Keto-NC) as oil core, and to evaluate their anti-inflammatory activity in acute and chronic ear edema models in mice. Physicochemical characterization, drug release, photostability and cytotoxicity assays were per...

In this work, the valorization of brines, with concentrations similar to those produced by reverse osmosis or electrodialysis processes, by electrolysis with diamond anodes is evaluated. To do this, synthetic brines made from solutions of NaCl (with target concentrations ranging from 1.0 to 2.0 ...