Cu ion core conservation from reactant to product in the Cu+F2 chemiluminescent reaction |
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Authors: | P. Baltayan F. Hartmann L. Hikmet J. -C. Pebay-Peyroula N. Sadeghi |
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Affiliation: | Laboratoire de Spectrométrie Physique (UA CNRS 08), Université Joseph-Fourier/Grenoble 1, B.P. 87, 38402 Saint-Martin d'Hères Cedex, France |
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Abstract: | Electronic chemiluminescence from the reaction of selected ground state (2S1/2) or metastable (2D5/2, 2D3/2) copper atoms with fluorine has been studied using a hollow cathode-flowing afterglow reactor. The observed signal related to the Cu(2S) and Cu*(2D) atom densities, indicate that the chemiluminescence cross-section for Cu*(2D) atoms is about 104 times larger than for Cu(2S) atoms. This strong propensity is explained in terms of a direct reaction, initiated by a harpooning process, during which the Cu+ ion core of the reactant (3d10 for Cu(2S) and 3d94s for Cu*(2D)) is conserved in the products (ionic structure Cu+(3d10)F− for the CuF ground state and Cu+(3d94s)F− for the CuF*(a, A, B, C, D) chemiluminescent states). |
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