title: Electrochemical and esr spin trap studies of a new iron tetra-catecholamide complex.
abstract: A new siderophore, N5,N6-thiodipropanoyl-bis[N1,N10-bis(2,3-dihydroxy benzoyl-spermidine)]-Fe (III) complex or H2LFe has been synthesised. The reaction of the reduced form of this complex with dioxygen has been investigated through electrochemical study and revealed the formation of a new species assumed to be H2O2. This species has been confirmed by esr spectroscopy using the diamagnetic compound 5-deutero-2,2,5-trimethylpyrrolidine-1-hydroxyl as spin trap. The resulting persistent radical is 5-deutero-2,2,5-trimethylpyrrolidine-1-yloxy (aN = 16.58 G, aD = 3.49 G).
authors.affiliation: Laboratoire de Chimie de Coordination Bioorganique et Bioinorganique, ICMO URA, Université de Paris-Sud, Orsay, France.
authors.forename: N
authors.initials: N
authors.lastname: Cheraïti
authors.forename: M E
authors.initials: ME
authors.lastname: Brik
authors.forename: B
authors.initials: B
authors.lastname: Keita
authors.forename: L
authors.initials: L
authors.lastname: Nadjo
authors.forename: A
authors.initials: A
authors.lastname: Gaudemer
mesh_terms: D002395:Catecholamines / Q000737:chemistry*; D004563:Electrochemistry; D004578:Electron Spin Resonance Spectroscopy; D005290:Ferric Compounds / Q000737:chemistry*; D007502:Iron Chelating Agents / Q000737:chemistry*; D013113:Spin Labels
chemical_list: D002395:Catecholamines; D005290:Ferric Compounds; D007502:Iron Chelating Agents; C121654:N5,N6-thiodipropanoylbis(N1,N10--bis(2,3-dihydroxybenzoylspermidine))iron(III); D013113:Spin Labels