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Electrochemistry of macrocyclic complexes
 Kaďorková, Veronika ; Liška, Alan (advisor) ; Kotek, Jan (referee)
The present thesis summarizes fundamental electrochemical properties of copper(II) complexes derived from three cyclame-like macrocyclic ligands. Target application of the studied complexes is radioimaging in medicine. The complexes were studied by means of DC-polarography and cyclic voltammery on mercury hanging drop electrode in buffered media (0.1M sodium acetate, pH 5) upon mixing of the ligand and copper(II) sulfate stock solutions. All three complexes undergo a single two-electron irreversible reduction process yielding free ligand and copper amalgam. The apparent thermodynamic stability of the investigated complexes (expressed as negative shift of the observed reduction potentials relatively to copper(II) sulfate) correlates to structural motifs employed in the individual ligand molecules. Presence of the bridged moiety as well as the carboxylate group seems to enhance the overall stability whereas the phenolic oxygen atoms in role of donor atoms seem to be less efficient.
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