期刊
JOURNAL OF CHEMICAL PHYSICS
卷 116, 期 23, 页码 10361-10371出版社
AIP Publishing
DOI: 10.1063/1.1478695
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Vibrational spectra in the ground electronic states, X B-2(1), of fluoro-, chloro-, bromo-, and iodobenzene cations and in the excited electronic states, B B-2(2), of chloro- and bromobenzene cations have been measured by mass-analyzed threshold ionization (MATI) via one-photon excitation with vacuum ultraviolet light. The spectra consist mostly of strong 0-0 bands and fundamentals, overtones, and combinations of totally symmetric a(1) modes. In particular, the observed vibrational bands in the B states have been assigned by referring to the assignments for the ionic ground states and those for the neutral molecules. From the MATI spectra, the ionization energies of fluoro-, chloro-, bromo-, and iodobenzene to the ionic ground states have been determined to be 74 229+/-5, 73 177+/-5, 72 570+/-5, and 70 638+/-5 cm(-1), respectively. The ionization energies to the B states have also been determined to be 91 404+/-5 and 85 822+/-5 cm(-1) for chloro- and bromobenzene, respectively. (C) 2002 American Institute of Physics.
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