Kinetic and redox characteristics of phenoxyl radicals of eugenol and isoeugenol: A pulse radiolysis study

The phenoxyl radicals of eugenol (EgOH) and isoeugenol (iEgOH) were generat ed by the specific one-electron oxidant N-3(.) using pulse radiolysis techn ique, and were characterized by their absorption spectra, decay and formati on kinetics, and one-electron reduction potential (E-7(1)) values, Reactivi ties of eugenol phenoxyl radical with the biologically important molecule, trolox C (analogue of vitamin E, alpha-tocopheral), were determined, Reacti ons of OH with these phenols were studied at different pHs and suitable mec hanisms for these reactions were suggested. Scavenging abilities of the phe nols toward highly damaging Br-., NO2., and CCl3O2. radicals were evaluated . (C) 2000 John Wiley & Sons, Inc.