15min:

ALAN T. MACCARONE, G. B. ELLISON, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215; MARK R. NIMLOS, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215 and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401.

²A'' phenylperoxyl radicals, \chemC₆H₅O₂, have been generated in a cryogenic Ar matrix. In a two pulse experiment, phenyl radicals, \chemC₆H₅, are generated via pyrolysis of phenyliodide in Ar through a hyperthermal \chemSiC nozzle and deposited on a \chemCsI window at 20 K; a second valve deposits a layer of \chemO₂ in Ar on top of the phenyl radicals. The process is repeated and phenylperoxyl radicals are formed in the matrix. The matrix is analyzed with an IR spectrometer to identify vibrational frequencies of the radical.