4,4'-Bis(dihexylaminocarbonyl)-2,2'-bipyridine (BDC-Bipy) was synthesized and studied systematically as a chelating reagent for metal ions extraction in supercritical CO(2). The compound showed high extraction efficiency for Co(2+) (100%), Cu(2+) (100%), Cd(2+) (98.2%), and Zn(2+) (100%) ions and good extraction efficiency for Sr(2+) (79.4%) and Pb(2+) (89.8%) when the extraction was performed ...

Phosphotriesterase, isolated from the soil-dwelling bacterium Pseudomonas diminuta, catalyzes the detoxification of organophosphate-based insecticides and chemical warfare agents. The enzyme has attracted significant research attention in light of its possible employment as a bioremediation tool. As naturally isolated, the enzyme is dimeric. Each subunit contains a binuclear zinc center that is...

In the title compound, [Zn(C(14)H(11)O(2))(2)(C(10)H(8)N(2))(H(2)O)(2)](n), the Zn(II) ion lies on a crystallographic inversion center and is in a slightly distorted octahedral coordination enviroment. 4,4'-Bipyridine ligands act as bridging ligands, connecting Zn(II) ions into a chain along the b-axis direction. In the crystal structure, these chains are linked by inter-molecular O-H⋯O hydroge...

BACKGROUND Serum albumin is the major protein component of blood plasma and is responsible for the circulatory transport of a range of small molecules that include fatty acids, hormones, metal ions and drugs. Studies examining the ligand-binding properties of albumin make up a large proportion of the literature. However, many of these studies do not address the fact that albumin carries multipl...

A highly sensitive fluorescent sensor, 8-(2-glucaminoacetylamino)quinoline, for Zn in water is synthesized by integrating a water-soluble glucose group with the 8-aminoquinoline fluorophore via a glycyl spacer. The sensor exhibits a highly selective fluorescence enhancement response to Zn over other metal ions. X-ray analysis shows that the deprotonation of NH in the sensor will occur upon bind...

Understanding the effect of temperature on the speciation of multivalent metals in solution is essential for many applications in industry. The results of the present Cu(II) and Zn(II) solutions speciation studies in tandem with thermodynamic calculations have shown that Cu or Zn ions proliferate in acidic solutions whilst in alkaline medium, solid Cu(OH)2 or Zn(OH)2 colloidal particles form. T...

Zinc is an essential metal ion for human growth and development, the disruption of cellular Zn(2+) homeostasis being implicated in several major disorders including Alzheimer's disease, diabetes, and cancer. The molecular mechanisms of Zn(2+) physiology and pathology are insufficiently understood, however, owing in part to the lack of tools for measuring changes in intracellular Zn(2+) concentr...

SalNa (sodium salinomycin) reacts with divalent transition metal ions of Co(II), Ni(II), Cu(II) and Zn(II) to produce novel compounds characterized by various spectroscopic methods. The interaction of metal (II) ions with SalNa results in the formation of mononuclear complexes of a general composition of [M(Sal)2·(H2O)2] nH2O (n = 0 or 2) where the divalent cations replace Na ions from the cavi...

The asymmetric unit of the title polymeric compound, [Zn(3)(C(10)H(8)O(4))(3)(C(5)H(5)N)(2)](n) or [Zn(3)(dmbdc)(3)(py)(2)](n) (dmbdc = 2,5-dimethyl-benzene-dicarboxyl-ate; py = pyridine) contains two Zn(II) ions, one of which is located on an inversion centre, one and a half 2,5-dimethyl-benzene-dicarboxyl-ate ligands and one pyridine ligand. Each ZnO(6) octa-hedron is sandwiched between two Z...

Some novel transition metal [Co(II), Cu(II), Ni(II) and Zn(II)] complexes of substituted pyridine Schiff-bases have been prepared and characterized by physical, spectral and analytical data. The synthesized Schiff-bases act as deprotonated tridentate for the complexation reaction with Co(II), Ni(II) and Zn(II) ions. The new compounds, possessing the general formula [M(L)(2)] where [M=Co(II), Cu...