نتایج جستجو برای: zn ii
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The zinc(II) complex [Zn2(dmdtc)2(μ-dmdtc)2] has been synthesized directly from thiram ligand, containing a disulfide bond {dmdtc = N,N-dimethyldithiocarbamate; thiram = N,N-tetramethylthiuram disulfide}, and characterized by elemental analysis and spectroscopic methods. Surprisingly thiram, undergoes a reductive disulfide bond scission upon reaction with Zn2+ in methanolic media to give the [Z...
Proton and Cu(II), Zn(II), Cd(II) and Pb(II) binding by ligand H(2)L, containing two bis(aminoethyl)amine (dien) units connected by a 2',7'-dichlorofluorescein (DCF) unit has been analyzed by means of potentiometric, UV-vis and fluorescence emission measurements. Considering proton binding, the ligand in its fully deprotonated form, L(2-), binds up to four acidic protons in the alkaline pH regi...
The formation of diethyldithiocarbamate complexes with Mn(III), Fe(III), Co(III), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II), Pb(II), and Bi(III) central atoms has been potentiometrically studied using a silver-complex electrode. Stability constants of complexes were determined in dimethyl sulfoxide and methanol as well as solubility products of Cu(II), Zn(II), and Cd(II) diethyldithiocarbamates in...
In the title compound, [Zn(C(5)H(3)N(4))(2)], the Zn(II) cation is in a nearly regular tetra-hedral coordination by purinate ligands. Each purinate ligand chelates two Zn(II) cations through two imidazole N atoms of the purinate anion ligand, leading to the formation of a three-dimensional network.
We synthesised heteroleptic azadipyrrinato-dipyrrinato hybrid zinc(II) complex 1-Zn-2, by means of the stepwise coordination method. Homoleptic bis(azadipyrrinato)zinc(II) complex 1-Zn-1 was non-fluorescent, whereas 1-Zn-2 exhibited detectable fluorescence from azadipyrrinato ligand 1.
The title compound, [Zn(C(14)H(12)O(6))(C(12)H(8)N(2))](n), is a coordination polymer forming one-dimensional infinite zigzag chains along [10[Formula: see text]] by inter-connection of Zn(II) atoms by 2,5-bis-(all-yl-oxy)-terephthalate anions via the carboxyl-ate groups. The Zn(II) atom is located on a twofold axis and is in a distorted tetra-hedral coordination formed by the two carboxyl-ate ...
The effects of increasing concentrations of Zn(II) and Cd(II) on the expression of the four isometallothioneins (isoMTs), namely MT-1a, MT-2a, MT-2d and MT-2e, in rabbit kidney cells (RK-13) and the development of cellular tolerance to these metal ions were studied. The results showed that, whereas in parental cells MT concentration was low and composed nearly exclusively of MT-2a and MT-1a, al...
In the title complex, [Zn(C(7)H(6)NO(2))(2)(C(10)H(8)N(2))], the Zn(II) cation is coordinated by two amino-benzoate anions and one 2,2'-bipyridine ligand in a distorted trigonal-bipyramidal geometry. The carboxyl-ate group of one aminobenzoate anion coordinates to the Zn(II) cation in a monodentate manner, whereas the carboxyl-ate group of the other amino-benzoate anion chelates the Zn cation w...
Five Pt(II) complexes were tested for their ability to interfere in Cu(II) or Zn(II) coordination to the Aβ peptide. Two of them induce modifications of the Cu(II) sphere but not the associated Cu(Aβ) ROS production. In contrast, they do completely preclude Zn induced Aβ aggregation.
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