We have devised a new approach that extends the kinetic method to systems where the competitive dissociation (the cornerstone of the kinetic method) will occur not at one binding center but at two spatially different places. This approach was tested on dissociation of complexes of two symmetric ...

The reaction between 1-phenyl-tetrazole-5-thione (1) and the metal hydroxides MOH (M = Li, Na, K, Rb, Cs) in the presence of crown ethers led to the alkali metal complexes, [Li(15-crown-5)(SCN4Ph)] (2), [Na(15-crown-5)(SCN4Ph)] (5), [K(18-crown-6)(SCN4Ph)] (4), [Rb(18-crown-6)(SCN4Ph)] (5), [Cs(...

The interaction between Na+ and K+ ions and benzo-15-crown-5 and dibenzo-30-crown-10 in CH3− CNH2O mixtures has been studied spectrophotometrically, at 25 °C and at ionic strength of 0.015. The formation constants for 1:1 complexes at different weight percentages of acetonitrile in water were...

Reaction of [UO2(TTA)22H2O] with benzo-15,crown-5 in chloroform yielded the compound [UO2(TTA)2H2O]2(benzo-15,crown-5) (1) in which the benzo-15,crown-5 ether acts as a second sphere ligand. However, similar reaction with dibenzo-18,crown-6 yielded the compound [UO2(TTA)2(μ-H2O)]2(H2O)2(dibenzo...

Binary diffusion coefficients D12 and retention factors k for dibenzo-24-crown-8 and 15-crown-5 ethers at 308.18 and 313.20 K, and vitamin K1 at 313.20 K were measured in supercritical carbon dioxide by the chromatographic impulse response technique, and the effects of molecular shapes on the D1...

The reactions of benzo-15-crown-5 and dibenzo-18-crown-6 with 1 equiv. of [(mes)Ru(MeNO2)3]2+ (mes = 1,3,5-C6H3Me3) give the mononuclear complexes [(mes)Ru(η6-benzo-15-crown-5)]2+ (1) and [(mes)Ru(η6-dibenzo-18-crown-6)]2+ (2) in 50% yield. Similar reaction with 2 equiv. of [(mes)Ru(MeNO2)3]2+...

Cation recognition plays a vital role in defining advanced functions of macromolecules in nature. An example of such an interaction is the action of a natural antibiotic, valinomycin, that behaves as a potassium ionophore. It encages the cation to transport it across a cell membrane and easily r...

Tris(2-chloroethyl)phosphates (TCEP) is a widely used flame retardant in the US. It has recently been identified as one of the most frequently detected contaminants in US streams. This contaminant is of toxicological concern in sensitive coastal ecosystems such as estuaries and salt marshes. It ...

Phosphate flame retardants and plasticizers (PFRs) are additives used in a wide range of polymers. Important representatives, such as tris(2-butoxyethyl) phosphate (TBOEP), triphenyl phosphate (TPHP), tris(2-chloroethyl) phosphate (TCEP), tris(1-chloro-2-propyl) phosphate (TCIPP), tris(1,3-dichl...

A range of alkylated phosphates and phosphites were for the first time investigated as potential supported liquid membranes (SLMs) for electromembrane extraction (EME) of basic drugs from human plasma samples. Six polar basic drugs were used as model analytes for initial testing of the different...

Given the compound differences between tris(2-butoxyethyl)- and tris(2-cloroethyl) phosphate (TBOEP and TCEP, respectively), we hypothesized that exposure of juvenile salmon to TBOEP and TCEP will produce compound-specific differences in uptake and bioaccumulation patterns, resulting in potentia...

Iron-doped hydrated nickel molybdate (FexNi1-xMoO4.0.75H2O, x = 0–0.10) nanorods were successfully synthesized via a simple one-pot hydrothermal route. Our investigations showed that hydrated nickel molybdate (HNMO) possesses identical crystal structure to CoMoO4.0.75H2O with a triclinic crysta...

Catalytic processes such as heterogenous photocatalysis or adsorptions have been extensively studied due to the difficulty in treating organic effluents, mainly textiles. The catalysts stability is essential to enable their applicability, so that the catalytic converter does not turn into second...

Eu3+ activated phosphors have been a subject of scientific investigation for more than 100 years. Various host materials have been employed, among which molybdate hosts play an important role. They offer an array of advantageous properties such as high critical activator concentrations, facile s...

Calcium molybdate (CaMoO4) is the main component of powellite and is a predominant intermediate in the pyrometallurgical and hydrometallurgical process of molybdenum. The extraction of Mo from CaMoO4 by a combination of phosphoric acid and hydrochloric acid was investigated. For further understa...

The induction time for sodium molybdate dihydrate crystallization from NaOH solution at 40 °C and 60 °C was investigated by experiment and the primary nucleation was also identified according to the classical nucleation theory. The bipyramidal truncated crystals and the nearly rectangular para...

For the corrosion protection of steel rebars in concrete, five different molybdate-phosphate conversion coatings were prepared, by changing the molybdate-phosphate ratio in the conversion baths. Their composition and morphology were studied with GD-OES, XPS, Raman spectroscopy and SEM-EDX and a ...

This paper presents the doping influence of both molybdate anion and 10-camphorsulfonic acid (CSA) on the characterization and corrosion protection properties of polypyrrole (PPy) film prepared on passivized CT3 mild steel. The effect of CSA and molybdate anion concentrations on the properties a...

The water activities of sodium molybdate in aqueous solutions at T = (303.15, 313.15, 323.15 and 333.15) K were determined, using vapor pressure osmometry. The range of salt concentration was from 0.06 to 2.2 mol kg−1. The results show that sodium molybdate has a significant effect on the water ...

Zinc molybdate nanostructures (ZMNPs) were synthesized by microwave-assisted route. ZMNPs were obtained from a mixture of sodium molybdate solutions and different zinc sources. The prepared nanostructures were characterized by different techniques such as Fourier transform infrared spectroscopy ...