the complexation reactions of some transition metal ions and 2-aminopyridine (2-ampy) were studied potentiometrically in aqueous solution at µ=0.1 m and 25 °c. the overall stability constants log β’s of all species are obtained by computer refinement of ph-volume data with using the best computer program. several models were tested and the best one accepted according to the least sum of squared...

in this work, modification of carbon paste electrode surface with poly (2, 5-dimethyl aniline) (p-2,5-dma) by using electrochemical polymerization was described. then, transition metal ions of ni(ii) were incorporated into the polymer film by two ways. at first way, the polymeric modified electrode was immersed in 0.2 m niso4 solutions and the second way was carried out by electrodeposition of ...

To determine the functional role of the metal-dependent conformational changes in Factor IX, two populations of conformation-specific anti-Factor IX antibodies were prepared. Anti-Factor IX X Mg(II) antibodies bind to Factor IX in the presence of Mg(II) and other metal ions, but not in the absence of metal ions. Anti-Factor IX X Ca(II)-specific antibodies bind to Factor IX in the presence of Ca...

4H-1-benzopyrans and their derivatives have been used widely as analytical reagents for the spectrophotometric determination of several transition metal ions. The present article reviews the importance of 4H-1-benzopyrans as analytical or complexing or chelating agent and fundamental conditions of several methods used for analytical determination of metal ions spectrophotometrically. Received d...

Mixed ligand complexes of transition metal ions such as Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) have been synthesized using 4-(Benzeneazo)salicylaldehyde, 2-amino-4-nitrophenol and nitrates of respective metal ions. The synthesized complexes have been characterized with infra red (IR), electronic, and H-NMR Spectra, molar conductance and magnetic susceptibility measurements at room t...

Classical and quantum mechanical theories of optical activity are reviewed with particular reference to the coordination compounds of the transition metal ions. The limiting cases of 'the inherently dissymmetric chromophore' and of 'the symmetric chromophore in a chiral molecular environment' are exemplified respectively by a discussion of the non-empirical exciton treatment of the tris-2,2'-bi...

Solid-state functional luminescent materials arouse an enormous scientific interest due to their diverse applications in lighting, display devices, photonics, optical communication, low energy scintillation, optical storage, light conversion, or photovoltaics. Among all types of solid luminophors, the emissive coordination polymers, especially those based on luminescent trivalent lanthanide ion...

A metal extraction system using fluorous solvents has been developed. Perfluorinated beta-diketone, 1,1,1,5,5,6,6,6-octafluoro-2,4-hexanedione (C(6)F(8)betaDK) dissolves in the fluorous solvent FC-72 and can extract transition metal ions from water into FC-72. The extraction efficiency in the FC-72 system is comparable to that of chloroform. By using the immiscibility of FC-72 with conventional...

carbon nanotubes (cnts) are a novel material that exhibits good adsorption behavior toward various toxic pollutants in aqueous solution. these adsorbents have a fast adsorption rate and high adsorption efficiency, efficient to remove various pollutants and they are easy to recover and reuse. these features highlight the suitability of cnts for the treatment of water polluted with heavy metal io...