A-band methyl halide dissociation via electronic curve crossing as studied by electron energy loss spectroscopy
Brunger, Michael James
American Institute of Physics
Excitation of the A-band low-lying electronic states in the methyl halides, CH3I, CH3Br, CH3Cl, and CH3F, has been investigated for the (n→σ∗) transitions, using electron energy loss spectroscopy (EELS) in the range of 3.5–7.5 eV. For the methyl halides, CH3I, CH3Br, and CH3Cl, three components of the Q complex (3Q1, 3Q0, and 1Q1) were directly observed, with the exception of methyl fluoride, in the optically forbidden EELS experimental conditions of this investigation. The effect of electronic-state curve crossing emerged in the transition probabilities for the 3Q0 and 1Q1 states, with spin-orbit splitting observed and quantified against results from recent ab initio studies.
Physics, Electron energy loss spectra, Organic compounds
Kato, H., Masui, H., Hoshino, M., Cho, H., Ingolfsson, O., Brunger, M.J., Limao-Vieira, P. and Tanaka, H., 2010. A-band methyl halide dissociation via electronic curve crossing as studied by electron energy loss spectroscopy. Journal of Chemical Physics, 133, 054304.