title: Electrochemical and spectrophotometric methods for evaluation of NO dissociation rate constants from nitrosyl metal complexes activated through reduction.
abstract: Electrochemical and spectrophotometric methods are described for measuring the rate of nitric oxide (NO) dissociation (k(NO)) from coordination compounds. Electrochemical methods based on double-potential step chronoamperometry and rotating ring-disc electrode voltammetry techniques proved to be suitable for measuring NO dissociation from 0.03 to 4.0 s(-1). The spectrophotometric method using an ancillary ligand as a colorimetric indicator is illustrated on measuring k(-NO)=0.002 s(-1). This methodology is limited only by the rate of the ancillary ligand substitution.
authors.affiliation: Instituto de Química-USP, São Paulo, Brazil.
authors.forename: Mauro
authors.initials: M
authors.lastname: Bertotti
authors.forename: Vânia
authors.initials: V
authors.lastname: Mori
authors.forename: Patrícia
authors.initials: P
authors.lastname: Zanichelli
authors.forename: José Carlos
authors.initials: JC
authors.lastname: Toledo
authors.forename: Douglas
authors.initials: D
authors.lastname: Wagner Franco
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D008670:Metals; D009569:Nitric Oxide