Functionalization of calix[4]arene with amidofluorene moieties at the lower rim led to formation of the 1,3-diconjugate of calix[4]arene L as a novel fluorescent chemosensor for Cu(2+). The receptor molecule L exhibited a pronounced selectivity towards Cu(2+) over other mono and divalent ions. The formation of the complex between L and Cu(2+) was evaluated by absorption, fluorescence and (1)H N...

Two new 1D coordination polymers, [Cu(3)(μ(3)-OH)(ppk)(3)(μ-N(CN)(2))(OAc)](n) (1) and {[Cu(4)(pdmH)(2)(pdm)(2)(μ(2)-OH)(H(2)O)]·ClO(4)}(n) (2) based on two different blocking ligands phenyl-2-pyridylketoxime (ppk) and pyridine-2,6-dimethanol (pdmH(2)) have been synthesized and were characterized by X-ray single crystal structural analysis. In compound 1, the hydroxido-bridged trinuclear core, ...

In the title compound, K(3)[Cu(C(10)H(12)N(2)O(10)P)]·2H(2)O, the Cu(II) ion, one potassium cation and a P atom are situated on a twofold rotation axis. The Cu(II) ion is coordinated by two N and four O atoms from one bis-{[bis-(carboxyl-atometh-yl)amino]-meth-yl}phosphinate ligand in a distorted octa-hedral coordination geometry. The two crystallographically independent potassium ions exhibit ...

In the title compound, [Cu(C(8)H(4)O(4))(C(12)H(11)N(5))(2)(H(2)O)](n), the Cu(II) ion is five-coordinated by two carboxyl-ate O atoms from two symmetry-related benzene-1,4-dicarboxyl-ate ligands, two N atoms from two symmetry-related N(6)-benzyl-adenine ligands and one water O atom in a square-pyramidal environment. The Cu(II) and water O atoms lie on a twofold rotation axis, and the benzene-1...

Bis-pyridylimine ligands with different linking elements are capable of forming unique hexanuclear circular Cu(II) meso-helicates; the self-assembly is controlled by coordination of sulfate ions to the metal centres.

In the title heterodinuclear complex, [CuNa(BF(4))(C(8)H(7)O(3))(2)](n), the Cu(II) ion is four-coordinated by four O atoms of two 2-formyl-6-meth-oxy-phenolate ligands, giving rise to a square-planar geometry. The Na(+) ion is six-coordinated by four O atoms from the two ligands and two F atoms of two tetra-fluoridoborate anions. The tetra-fluoridoborate anion links the Na(+) ions, forming a o...

In the title compound, [Cu(C(8)H(4)NO(6))(2)(C(13)H(14)N(2))](n), the square-planar coordinated Cu(II) ion lies on an inversion centre and is coordinated by two protonated 5-nitro-isophthalate ligands. The Cu(II) ions are linked into a one-dimensional coordination polymer by tethering 1,3-di-4-pyridylpropane ligands, whose central methyl-ene C atoms are situated on twofold rotation axes. The ch...

Despite widespread use and prospective biomedical applications of copper nanoparticles (Cu NPs), their biosafety issues and kinetics remain unclear. Thus, the aim of this study was to compare the detailed in vivo toxicity of Cu NPs and cupric ions (CuCl2; Cu ions) after a single oral dose. We determined the physicochemical characteristics of Cu NPs, including morphology, hydrodynamic size, zeta...

Heavy-metal ions and organic mercurials are known to have a pronounced inhibitory action on many enzymes (see Dixon & Webb, 1958). It is generally accepted that these reagents are reactive towards sulphydryl groups (see Gurd & Wilcox, 1956; Cecil & McPhee, 1959; Boyer, 1959) and also towards other groups (Sohler, Seibert, Kreke & Cook, 1952; Myrback, 1957). A detailed investigation of the effec...

Wounding of tomato (Lycopersicon esculentum L.) leaves causes systemic induction of a serine-type carboxypeptidase activity. We find this activity to be present in several isoforms. Antibodies raised against the leaf carboxypeptidase inhibited the enzyme activity and the immunoprecipitates were resolved into a 69-kDa polypeptide and a doublet of 35/37-kDa proteins on SDS-PAGE. Immunoblot analys...