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Synthesis, Structure, and Spectroscopic and Electrochemical Properties of Copper(II/I) Complexes with Symmetrical and Unsymmetrical 2,9‐Diaryl‐1,10‐phenanthroline Ligands
Author(s) -
Yang Peiju,
Yang XiaoJuan,
Wu Biao
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900024
Subject(s) - chemistry , copper , phenanthroline , denticity , cyclic voltammetry , electrochemistry , ligand (biochemistry) , crystallography , halogen , crystal structure , redox , coordination complex , stereochemistry , medicinal chemistry , inorganic chemistry , metal , organic chemistry , electrode , biochemistry , alkyl , receptor
A series of copper(II) and copper(I) complexes, [CuX 2 L] ( 1 – 6 ) and [CuL 2 ](CuX 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)