Excited state dynamics of C2O(3Πi) |
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Authors: | W.M. Pitts V.M. Donnelly A.P. Baronavski J.R. McDonald |
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Affiliation: | Laser Chemistry Group, Chemistry Division, Naval Research Laboratory, Washington, DC 20375, USA |
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Abstract: | The fluorescence decay and bimolecular electronic quenching behavior of C2O (3Πi) is reported. C2O(3Σ?) is produced by laser photolysis of C3O2 at 266 nm and is subsequently excited by a tunable flashlamp pumped dye laser. The fluorescence decay is highly nonexponential and dominated by both short (≈ 15 μs) and long (50–250 μs) decay components. The long-lived emission, itself, is nonexponential. The fluorescence decay is modeled as the sum of three exponential components. The short-lived emission is quenched by C3O2 at higher than the gas kinetic rate while the long-lived fluorescence is quenched much less efficiently. Fluorescence quenching measurements are also reported for collisions with Ar, N2 and O2. |
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