Two series of copper(I) complexes with diethoxyphosphoryl-substituted 1,10-phenanthroline ligands were investigated as to their electrochemical and spectroscopic properties in benzonitrile and dichloromethane, containing 0.1 M tetra-n-butylammonium perchlorate (TBAP) as supporting electrolyte. The first series is comprised of Cu(I) complexes with a single substituted phenanthroline ligand while the second includes bis-chelates with two substituted phenanthroline ligands. Selected examples of the investigated compounds are shown in Chart 1. Each mono- or bis-phenanthroline copper(I) complex undergoes multiple redox reactions, some of which involve the Cu(I) center and some of which involve the substituted phenanthroline ligand. The reversibility and potentials of the electrode reactions were found to depend on the solvent, temperature, potential scan rate, as well as the location and the number of the phosphorus substituents on the phenanthroline ligand. Thin-layer UV-visible spectroelectrochemistry was used to study the site of electron transfer.Chart 1.  Selected examples of examined compounds.

Copper(I) complexes with diethoxyphosphoryl-1,10-phenanthrolines: Electrochemistry and spectroscopy

247th National Meeting (2014)

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