Photodissociation of H2O2 at 248 nm: translational anisotropy and oh product state distributions |
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| Institution: | 1. Department of Orthopedic Surgery, Division of Hand and Microvascular Surgery, Mayo Clinic, 200 First Street S.W., Rochester, MN 55905, USA;2. Department of Plastic Surgery, Radboudumc, Geert Grooteplein Zuid 10, 6525GA Nijmegen, the Netherlands;3. Hand and Wrist Surgery, Xpert Clinic, Jan Leentvaarlaan 14-24, 3065 DC Rotterdam, the Netherlands;4. Department of Biochemistry and Molecular Biology, Mayo Clinic, 200 First Street S.W., Rochester, MN 55905, USA;1. Department of Astronomy and Planetary Science, Northern Arizona University, Box 6010, Flagstaff, AZ 86011, USA;2. Center for Materials Interfaces in Research and Applications (MIRA), Northern Arizona University, Box 6010, Flagstaff, AZ 86011, USA |
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| Abstract: | Ground-state OH(X2Π) fragments, from the photodissociation of H2O2 at 248 nm, have been probed by laser-induced fluorescence. Nascent product rotational distributions and polarisation-dependent Doppler lineshapes are reported. The high translational anisotropy (β = −1 at low N″) indicates a prompt repulsion along the O-O axis. Polarisation-dependent Doppler lineshapes are interpreted as a correlation between the fragment recoil velocity v and angular momentum JOH, the product rotation being aligned along v. Product rotation is generated by an axial torsion about the O-O axis, consistent with a change in dihedral angle in the upper state. |
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