The copper (II) complexes (CuL(2)) were prepared by reaction of Cu(CH(3)COO)(2) with the corresponding derivatives of acylthioureas in a Cu:HL molar ratio of 1:2. Acylthiourea ligands, N,N-diethyl-N'-(R-benzoyl) thiourea (HL(1-3)) [R=H, o-Cl and p-NO(2)] were synthesized in high yield (78-83%) and characterized by elemental analysis, infrared spectroscopy, (1)H and (13)C NMR spectroscopy. The c...

The aqueous solubility of oxyanion (e.g. phosphates and arsenates), and thereby their mobility, bioavailability (phosphates) and toxicity (arsenates), in soils and sediments is dependent upon their chemical speciation. In complex, multicomponent systems, equilibrium modelling can be a useful tool to predict chemical speciation. When establishing a model, it is essential to understand the intera...

The Cu(II)- and Co(II)-binding properties of two peptides, designed on the basis of the active site sequence and structure of the blue copper protein plastocyanin, are explored. Peptide BCP-A, Ac-Trp-(Gly)(3)-Ser-Tyr-Cys-Ser-Pro-His-Gln-Gly-Ala-Gly-Met-(Gly )(3)-His-(Gly)(2)-Lys-CONH(2), conserves the Cu-binding loop of plastocyanin containing three of the four copper ligands and has a flexible...

Methoxy-substituted aromatic diimines and corresponding homoleptic copper( i ) ii complexes as possible redox mediators in dye-sensitized solar cells.

Reactions of the copper complexes Cu(II)Cl2, [Cu(II)(EDTA)]2-, [Cu(II)2(DIPS)4] and [Cu(I)(DMP)2]+ (where DIPS is 3,5-diisopropylsalicylate and DMP is 2,9-dimethylphenanthroline) with human blood plasma and urine have been studied by 500 MHz 1H NMR spectroscopy, and CD spectroscopy has been used to monitor the transfer of Cu(II) onto albumin in plasma. The rate of transfer of Cu(II) from [Cu(II...

Superoxide anion generation plays an important role in the development of paraquat toxicity. Although superoxide dismutase mimetics (SODm) have provided protection against organ injury involving generation of superoxide anions, they often suffer problems, e.g., regarding their bioavailability or potential pro-oxidant activity. The aim here was to investigate and compare the therapeutic potentia...

Metal organic frameworks such as copper(II) monocarboxylate (formate and benzoate) pyridine derivatives and zinc(II) monocarboxylate (p-phenyl benzoate and benzoate) pyridine derivatives have been prepared. The complexes were synthesized at room temperature using pyridine or p-phenyl pyridine to grow single crystals, which were subsequently analyzed using single-crystal X-ray analysis. These st...

14-membered hexaazamacrocyclic complexes were synthesized by the condensation reaction method of ethylenediamine, formaldehyde, and either butylamine or hexylamine using metal salt as Cu(II) and Ni(II) in a 2 : 4 : 2 : 1 mole ratio, respectively. The chemical formula of complexes was [CuL1](ClO4)2 (1), [NiL1](ClO4)2 (2), [CuL2](ClO4)2 (3), and [NiL2](ClO4)2 (4), where L1 = 3,10-dibutyl-1,3,5,8,...

The synthesis, characterization, and structures of a series of homoleptic and heteroleptic copper(I) complexes supported by N-heterocyclic chalcogenone ligands is reported herein. The quasi-reversible Cu(II/I) reduction potentials of these copper complexes with monodentate (dmit or dmise) and/or bidentate (Bmm(Me), Bsem(Me), Bme(Me), Bsee(Me)) chalcogenone ligands are highly dependent upon the ...