Copper ions with ligands, conditional

Van den Berg, C. M. G., and J. R. Kramer (1979), "Conditional Stability Constants for Copper Ions with Ligands in Natural Waters", in E. Jenne, Ed., On Chemical Modeling Speciation, Sorption, Solubility and Kinetics in Aqueous Systems, ACS Symp. Series. 

Conditional Stability Constants for Copper Ions with Ligands in Natural Waters... 

Van den Berg, C.M.G., 1984. Determination of the complexing capacity and conditional stability constants of complexes of copper (II) with natural organic ligands in seawater by CSV of copper-catechol complex ions. Mar. Chem., 15 1-18. 

Van den Berg, C. M. G. (1984) Determination of the Complexing Capacity and Conditional Stability Constants of Complexes of Copper(II) with Natural Organic Ligands in Seawater by Cathodic Stripping Voltammetry of Copper-Catechol Complex Ions, Mar. Chem. 15, 1-18. 

The role of the zinc ion in CuZnSOD appears to be primarily structural. There is no evidence that water, anions, or other potential ligands can bind to the zinc, so it is highly unlikely that superoxide could interact with that site. Moreover, removal of zinc under conditions where the copper ion remains bound to the copper site does not significantly diminish the SOD activity of the enzyme." However, such removal does result in a diminished thermal stability,... 

When only 20% of copper(l) salt was added to the reaction mixture, approximately the same amount of rotaxane (-20%) was formed, indicating that the copperfl) ions stayed coordinated to the freshly formed rotaxane and do not turn over. To enable this catalytic behaviour, addition of 3 equivalents of pyridine as competing ligand and higher temperatures (70 °C) were necessary. Under these conditions the [2]rotaxane 68 could be obtained in 82% yield by using only 4% copper(I) with respect to both azide 61 and alkyne 52. 

The 14-membered macrocyclic phosphine 77 and corresponding sulfide 78 were prepared by the macrocyclization under high dilution conditions and further oxidation with sulfur (Scheme 12.29). Both ligands were used as ionophores in an all-solid state poly(vinylchloride) matrix membrane electrode. The sulfide 78 based electrode exhibited a Nemstian response towards copper (II) ions with a cationic slope of 30.7 mV/pCu and a detection limit of 5.97 x 10 M. The potential response remains almost unchanged over the pH range 3.9-6.4 at least 7 months. Sensors based on the macrocycles 77 and 78 demonstrate the copper (11) ion sensitivity over other metal ions [83]. 

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