The Visible Photodissociation Spectra of the Molecular Ions of Negative Carbonate, Negative Ozone, and Positive Ozone by Triple Quadrupole Mass Spectrometry.
A modified version of the triple quadrupole photodissociation mass spectrometer utilizing a chemical ionization ion source and a nitrogen pumped tunable dye laser is described. The visible photodissociation spectra are reported for the processes. CO(,3)('-) + h(nu) (--->) O('-) + CO(,2). O(,3)('-) + h(nu) (--->) O('-) + O(,2). (--->) O(,2)('-) + O. O(,3)('+) + h(nu) (--->) O('+) + O(,2). (--->) O(,2)('+) + O. as absolute cross sections as functions of photon energy. Sequential two photon processes and excited state ion/neutral. reactions are observed directly for the visible excitation of CO(,3)('-). Rate constants and absolute cross sections are presented for these. reactions, and for the inferred fluorescent and relaxation processes. as well. Thresholds are located for three of these dissociations as. D(CO(,2)-O('-)) 2.258 (+OR-) 0.008 eV. D(O-O(,2)('-)) 2.410 (+OR-) 0.010 eV. D(O(,2)-O('+)) 1.860 (+OR-) 0.005 eV. Excited states of O(,3)('-) are identified, and vibrational analyses are included for the O(,3)('-) and O(,3)('+) spectra.
- Pub Date:
- Physics: Molecular