A new fluorescent chemosensor based on calix[4]arene bearing four iminoquinoline subunits on the upper rim was conveniently synthesized, which showed a remarkable enhanced fluorescent intensity in the presence of Cu(2+) ion and a high selectivity toward Cu(2+) ion over a wide range of tested metal ions in acetonitrile.

By utilizing thioether ligands, CuproCleav-1 stabilizes Cu(+) complexes in aqueous solution and releases the guest metal ion upon photolysis of the nitrobenzyl group. The photocage has an apparent K(d) of 54 pM for Cu(+), and metal ion release has been demonstrated using the fluorescent sensor CS1.

In the title complex, [Cu(C(12)H(15)Cl(2)N(2)O)(2)], the Cu(II) ion is coordinated by one N,O-bidentate and one N,N',O-tridentate Schiff base ligand, resulting in a distorted CuN(3)O(2) square-based pyramidal coordination for the metal ion, with the O atoms lying trans to each other in the basal plane.

In the title compound, [Cu(C(6)H(10)NS(2))I(C(12)H(8)N(2))], the Cu(II) ion is coordinated by one iodide ion, two N atoms of the phenanthroline ligand and two S atoms from the piperidyl-dithio-carbamate ligand in a distorted square-pyramidal environment.

The reduction of Cu(330) in Rhus vernicifera laccase by chromous ion is 30% faster than reduction of Cu(614) at room temperature [pH 4.8, mu = 0.1 (NaCl)], and two parallel first-order paths, attributed to heterogeneity of the protein, are observed at both wavelengths. The reactions of stellacyanin, spinach and French-bean plastocyanins, and cytochrome c with chromous ion under similar conditio...

novel collagen-based hydrogel nanocomposites were synthesized by graft copolymerization of acrylamide and maleic anhydrid in the presence of different amounts of montmorillonite, using methylenebisacrylamide (mba)and ammonium persulfate (aps) as crosslinker and initiator, respectively. the optimum amount of clay on the swelling properties of the samples was studied. it was found that the hydrog...

Electron spin echo envelope spectroscopy was used to probe the two metal binding sites of Cu(II)-conalbumin. The echo envelope spectrum of Cu(II)-conalbumin-oxalate, with metal ion at either one or both of the binding sites, contains lines arising from the interaction of the electron spin of Cu(II) with bound imidazole, demonstrating histidine ligation to the metal ion. The 13C superhyperfine i...

In the title compound, [Cu(C(5)H(8)NS(2))I(C(10)H(8)N(2))], the Cu(II) ion is coordinated by one iodide ion, two N atoms of the bipyridine ligand and two S atoms from the pyrrolidine-1-dithio-carboxyl-ate ligand in a distorted square-pyramidal environment.

In the title compound, [Cu(C12H16NO2)2], the Cu(II) ion, located on a center of inversion, is coordinated by two singly deprotonated Schiff base ligands derived from condensation of salicyldehyde and 1-amino-pentan-5-ol. The imino N and phenol O atoms from both ligands offer a square-planar arrangement around the metal ion. The Cu-N and Cu-O bond lengths are 2.0146 (15) and 1.8870 (12) Å, respe...

In the title complex, [Cu(I)Cu(II)(CN)3(C4H12N2)2], the Cu(I) and Cu(II) ions and a bridging cyanide group lie on a twofold rotation axis. The Cu(II) ion is in a slightly-distorted square-pyramidal coordination environment, with the N atoms of the two symmetry-related N-ethyl-ethylenedi-amine ligands occupying the basal positions and an N-bonded cyanide group in the apical position. The Cu(I) i...