This report describes systems which combine the structural and reactive motifs of a dinucleating terpyridine-aminomethylpyridine ligand, L, with the coordination preferences and flexibilities of particular divalent metal ions to form a series of closely related box structures in a deliberate fashion. The ligand also produces unprecedented decanickel wheel complexes. Halogen to aromatic hydrogen...

Metal ions are critical for the proper folding of RNA, and the GAAA tetraloop-receptor is necessary for the optimal folding and function of many RNAs. We have used NMR to investigate the role of metal ions in the structure of the tetraloop-receptor in solution. The NMR data indicate native tertiary structure is formed under a wide range of ionic conditions. The lack of conformational adaptation...

The adsorption of lead, cadmium and nicel from aqueous solution by sawdust of walnut was investigated. The effect of contact time, initial metal ion concentration and temperature on metal ions removal has been studied. The equilibrium time was found to be of the order of 60 min. Kinetics fit pseudo first-order, second-order and intraparticle diffusion models, hence adsorption rate constants wer...

Complexes formed between D!glucoheptonate\ D!galactonate\ D!gulonate and D!ribonate\ and several metal ions were obtained in the solid state[ Speci_cally] D!glucoheptonates\ Be"C6H02O7#1 = 0:1H1O\ Mn"C6H02O7#1 = 1H1O\ Co"C6H02O7#1 = 1H1O\ Ni"C6H02O7#1 = 1H1O\ Cu"C6H02O7#1 = 1H1O\ Pb"C6H02O7#1^ D!gal! actonates\ Mn"C5H00O6#1 = 1H1O\ Co"C5H00O6#1 = 2H1O\ Ni"C5H00O6#1 = 2H1O\ Cu"C5H00O6#1\ Pb"C5H0...