Synthesis, Structure, and Spectroscopic and Electrochemical Properties of Copper(II/I) Complexes with Symmetrical and Unsymmetrical 2,9-Diaryl-1,10-phenanthroline Ligands

✍ Scribed by Peiju Yang; Xiao-Juan Yang; Biao Wu

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 616 KB
• Volume: 2009
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200900024

✦ Synopsis

Abstract

A series of copper(II) and copper(I) complexes, [CuX~2~L] (1–6) and CuL~2~ (7–12) (X = Cl, Br; L = 2‐R‐9‐R′‐1,10‐phenanthroline, dpp: R = R′ = Ph; npp: R = naphthyl, R′ = Ph; dnp: R = R′ = naphthyl) were synthesized and characterized by elemental analysis, UV/Vis and IR spectroscopy, and X‐ray crystal diffraction (for 1, 3, 6, and 12). The copper(II) complexes are four‐coordinate with one phenanthroline ligand and two halogen atoms, whereas the copper(I) complexes are tetrahedrally coordinated by two bidentate phenanthroline ligands. Cyclic voltammetry studies of the Cu^I^ complexes in CH~2~Cl~2~ reveal that bulky groups in the 2,9‐positions have significant effects on the redox potential of the Cu^II/I^ couple, which is more positive for the complexes with the dnp ligand than those with the dpp and npp ligands. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)