193672-83-2Relevant academic research and scientific papers
Synthesis, spectroscopy, and electrochemistry of copper(II) complexes with N,N′-bis(3,5-di-t-butylsalicylideneimine) polymethylenediamine ligands
Kasumov, Veil T.,Koeksal, Fevzi
, p. 225 - 231 (2005)
Bulky salen CuLx derived from aliphatic polymethylene diamines, H2N-(CH2)x-NH2, where n = 2-6, and 3,5-di-t-butylsalicylaldehyde (H2Lx) and some corresponding tetrahydrosalan complexes (CuL′x) have been synthesized and characterized by their IR, UV - vis absorption and EPR spectra, by magnetic moments and by cyclic voltammetry in acetonitrile (for H 2Lx) and DMF (for CuLx). Complexes CuL x and CuL′x are magnetically normal (μexp = 1.83-1.91 μB). EPR spectra CuLx characterized by the axial g and ACu, tensors with g∥ > g⊥ and without 14N-shf resolution in CHCl3/toluene at 300 and 150K. The CV studies on acetonitrile solutions of H2L x revealed a well-defined quasi-reversible redox wave at E 1/2 = 0.95-1.15 V versus Ag/AgCl but CV of the CuLx complexes in DMF exhibit weak pronounced irreversible oxidation waves at E pa1, = 0.51 - 0.98 V and Epa1 = 1.16 - 1.33 V attributable to metal centered Cu(II/III) and ligand centered CuL x/CuLx+ couples, respectively. A poorly defined wave was observed for the quasi-reversible reduction Cu(II)/Cu(I) at potentials less than - 1.0 V.
