The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2000
Filed:
Apr. 10, 1997
Barry S Goodell, Bangor, ME (US);
Jody L Jellison, Bangor, ME (US);
Jing Liu, Rutland, VT (US);
Srinivasan Krishnamurthy, Piscataway, NJ (US);
The Board of Trustees University of Main System, Bangor, ME (US);
Abstract
A method of forming reactive oxygen species by solubilizing a metal ion from a metal oxy(hydr)oxide compound with an iron oxy(hydr)oxide solubilizing chelator to yield a first soluble metal ion chelate complex. The metal ion is transferred from the chelate complex to a free redox cycling chelator to form a second metal ion chelate complex which reduces the metal ion to a reduced metal species. The reduced metal species is reacted with an oxygen containing oxidant to yield a free redox cycling chelator and a reactive oxygen species. The reactive oxygen species may be used to oxidize a target substrate. The preferred metal ion is a cationic transition metal, such as iron or manganese. A preferred iron oxy(hydr)oxide solubilizing chelator is oxalic acid. The method is generally performed at acidic pH. Also provided is a method of protecting an organic composition from reactive oxygen species comprising impregnating the composition with a redox cycling chelator able to form a reduced metal ion chelate complex with a metal ion, the chelator present in an amount sufficient to protect the composition from degradation from reactive oxygen species such as hydroxyl radical or superoxide anion.