Abstract
Chemical bonds in a molecule are characterized by the electron spatial distributions, which are well understood by a molecular orbital (MO) theory. Ionization energies, measured by photoelectron spectroscopy (PES), are correlated with the orbital energies under Koopmans’ theorem. Thus, PES using extreme ultraviolet (XUV) light probes not only the highest occupied MO (HOMO) but also the lower-lying MOs with different electron spatial distributions inside a molecule. The temporal evolution of a PE spectrum reflects the bond breaking and formation. Using single-order high harmonic pulses, we can identify which chemical bond breaks and how the molecular structure changes during photochemical reactions, which we would like to call time-resolved MO spectroscopy (TRMOS).
© 2015 IEEE
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