title: Synthesis, structure, redox properties and azide binding for a series of biphenyl-based Cu(II) complexes.
abstract: A series of biphenyl-based N(3)O ligands, 2, 4, 6, and 8 were synthesized and their Cu(II) complexes prepared. These complexes were characterized by a combination of elemental analysis, FAB-MS, UV-vis spectroscopy and electrochemistry. The structure of [Cu(N(3)O-mpy-NO2)Cl2], 12 [N(3)O-mpy = 2-(3-pyridylmethylimino)-2'-(2-methylaminophenol)biphenyl], was solved and showed that the ligand coordinates through the three nitrogens with the phenol oxygen uncoordinated. Titration of azide anion into solutions of the complexes in methanol resulted in the appearance of a new band between 485-495 nm at the expense of the starting peak at 380 nm. Cyclic voltammetry studies indicated that the complexes undergo quasi-reversible one-electron reductions in acetonitrile at potentials between 0.13-0.58 V vs. Ag/AgCl. The complexes were found to be weakly active for the oxidation of di-tert-butyl catechol (DTBC).
authors.affiliation: Department of Chemistry, University of San Francisco, San Francisco, CA 94117, USA.
authors.forename: Jacky
authors.initials: J
authors.lastname: Chen
authors.forename: Robert
authors.initials: R
authors.lastname: Russo
authors.forename: Wilson
authors.initials: W
authors.lastname: Chao
authors.forename: Lawrence D
authors.initials: LD
authors.lastname: Margerum
authors.forename: Mitchell R
authors.initials: MR
authors.lastname: Malachowski
authors.forename: Ryan
authors.initials: R
authors.lastname: White
authors.forename: Zachary
authors.initials: Z
authors.lastname: Thawley
authors.forename: Angelina
authors.initials: A
authors.lastname: Thayer
authors.forename: Arnold L
authors.initials: AL
authors.lastname: Rheingold
authors.forename: Lev N
authors.initials: LN
authors.lastname: Zakharov
mesh_terms: D001386:Azides / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002396:Catechols / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D007202:Indicators and Reagents; D008024:Ligands; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry
chemical_list: D001386:Azides; D001713:Biphenyl Compounds; D002396:Catechols; D007202:Indicators and Reagents; D008024:Ligands; D009942:Organometallic Compounds; C054068:3,5-di-tert-butylcatechol; D003300:Copper; D010100:Oxygen