A highly effective synthetic route for TE2A was developed and the (64)Cu-labeled TE2A complexes showed higher kinetic inertness and faster clearance than most commonly used TETA analogs.

The synthesis and characterization of a novel ligand, bis[(2-ethyl-5-methyl-imidazo-4-yl)methyl]sulfide (bemims), as well as a bemims-containing copper(II) coordination complex are described. In this complex, [Cu(bemims)X(2)] with X = NO(3) (-), bemims acts as a tridentate ligand and two monodentate nitrate ions complete the coordination sphere. Both imidazole N atoms and the thioether S atom o...

We report herein the synthesis and application of a series of novel cyclometalated iridium(III) complexes 1-3 bearing a rhodamine-linked NˆN ligand for the detection of Cu(2+) ions. Under the optimised conditions, the complexes exhibited high sensitivity and selectivity for Cu(2+) ions over a panel of other metal ions, and showed consistent performance in a pH value range of 6 to 8. Furthermore...

Copper has many roles in biology that involve the change of coordination sphere and/or oxidation state of the copper ion. Consequently, the study of copper in heterogeneous environments is an important area in biophysics. EPR is a primary technique for the investigation of paramagnetic copper, which is usually the isolated Cu(II) ion, but sometimes as Cu(II) in different oxidation states of mul...

The long elusive structure of Cu(II) hydrate in aqueous solutions, classically described as a Jahn-Teller distorted octahedron and recently proposed to be a fivefold coordination structure [Pasquarello et al., Science 291, 856 (2001)], has been probed with x-ray-absorption spectroscopy by performing a combined theoretical and experimental analysis. Two absorption channels were needed to obtain ...

Novel peptoids useful for the detection and suppression of various components contributing to oxidative stress and for elucidation of the interplay between these species are presented. Oxidative stress involves redox-active metal ion activation/generation of RONS (reactive oxygen and nitrogen species). For detection of RONS, the peptoid probes consist of a conjugate designed to (1) complex redo...

Nature of a large number of pyridine N-oxide-metal complexes 1) has been investigated in detailes, and pyridazine and its derivatives are also known to afford complexes with a variety of metal ions. ‘I However, no attention has been given to complex formation between pyridazine N-oxides(I) and metal ions. 3) It is interesting to examine the structures and properties of the complexes of I becaus...

In the title dinuclear complex, [Cu(2)(C(5)H(6)BrN(2))Cl(3)(C(5)H(7)BrN(2))(4)]·CH(3)CN, both Cu(II) ions are in slightly distorted square-pyramidal coordination geometries. The basal planes are defined by three N atoms from three 4-bromo-3,5-dimethyl-pyrazolate ligands, one of which is bridging, and one Cl ligand. A bridging Cl ligand forms the apical site for both Cu(II) ions. In the crystal,...

Furazolidone, on complexing with DNA, led to its thermal stabilization. The increase in transition temperature of DNA (delta Tm) increased linearly with % A--T content. Increasing concentration of Cu(II) ions progressively lowered the transition temperature of DNA, but Cu(II) ions were not equally effective in lowering the transition temperature of furazolidone-DNA complex. When equimolar amoun...

This investigation deals with the effects of cupric, manganous, ferric, and antimonate ions; extracts of calves' lungs, calves' hearts, and chicken livers; and of diphenylamine and other organic compounds; on the growth of H37, a human strain of tubercle bacilli. It was carried out at the suggestion of Dr. Kharasch, who, with his co-workers (Kharasch, Conway and Bloom, 1936), had studied the ef...