Abstract
N-methylpyrrole-RG (RG = Ar, Kr) complexes are investigated using resonance-enhanced multiphoton ionization (REMPI) and zero-electron-kinetic-energy (ZEKE) spectroscopy. The RG atom makes the electronic transition to the S1 state allowed, and the REMPI spectrum is blue-shifted compared to the N-methylpyrrole origin, with no bands associated with vibrational excitation of the N-methylpyrrole moiety. The nature of the electronic structure of the S1 state is discussed. Binding energies are obtained for all three electronic states. Adiabatic ionization energies are obtained from the ZEKE spectra, yielding values of 64077 ± 5 cm−1 and 64029 ± 5 cm−1 for RG = Ar and Kr, respectively.
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