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Resonantly enhanced multiphoton ionization and zero kinetic energy photoelectron spectroscopy of Benzo[e]pyrene Public Deposited

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  • We report zero kinetic energy (ZEKE) photoelectron spectroscopy via resonantly enhanced multiphoton ionization (REMPI) for benzo[e]pyrene. Extensive vibronic coupling between the first electronically excited state and a nearby state allows b₂ symmetric modes to be observed which would normally be Franck-Condon (FC) disallowed. These vibronic modes are comparable in intensity to the FC allowed a₁ modes. Gaussian 09 is able to qualitatively simulate the vibronic spectra of the REMPI and the ZEKE experiment using density functional methods. The ZEKE spectra demonstrate propensity in preserving the vibrational excitation of the intermediate electronic state. These results suggest a remarkable structural stability of BeP in accommodating the additional charge.
  • Keywords: far infrared vibrational spectroscopy, photoionization spectroscopy, zero kinetic energy photoelectron spectroscopy, vibronic coupling, polycyclic aromatic hydrocarbons
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  • Harthcock, C., Zhang, J., & Kong, W. (2013). Resonantly enhanced multiphoton ionization and zero kinetic energy photoelectron spectroscopy of benzo[e]pyrene. Chemical Physics Letters, 556, 23. doi: 10.1016/j.cplett.2012.11.036
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  • 556
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  • This work is supported by the National Aeronautics and Space Administration under award No. NNX09AC03G.
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