PlumX Metrics
Embed PlumX Metrics

Real-time dissociation dynamics of the Ne Br van der Waals complex

Journal of Chemical Physics, ISSN: 0021-9606, Vol: 133, Issue: 1, Page: 014305
2010
  • 27
    Citations
  • 0
    Usage
  • 14
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    27
    • Citation Indexes
      27
  • Captures
    14

Article Description

We have characterized the vibrational predissociation (VP) of the Ne Br van der Waals complex using time- and frequency-resolved pump-probe spectroscopy. After exciting Br within the complex to a vibrational level 16≤ ν'≤23 in the B state, we follow the flow of halogen vibrational energy to the van der Waals modes in real time by recording the time-dependent behavior of Ne Br (ν'), the NeBr (ν'-m) intermediates, and the Br (ν'-n) products. For Ne Br (ν'=16-18), the only intermediate observed is NeBr (ν'-1), and the majority of the final product is Br (ν'-2), indicating the dissociation happens via two sequential direct VP steps. We fit the time-dependent behavior of these species to a sequential mechanism and extracted time constants for each step. For higher ν'levels, the results show that the dissociation occurs via multiple pathways. Product Br from levels lower than (ν'-2) becomes much more important, with products as low as (ν'-5) being observed. For ν'=21, we observe both NeBr (ν'-1) and (ν'-2) intermediates. The intermediates have significantly different kinetics, with the decay rate of the (ν'-1) transient being nearly twice that of the (ν'-2) transient. Similarly, both Br (ν'-2) and (ν'-3) are formed in almost equal amounts, but the (ν'-2) product formation rate is faster than the (ν'-3) rate. The broad vibrational product state distributions and multiple dissociation pathways indicate that intramolecular vibrational energy redistribution becomes increasingly important for ν'>19. We also report vibrational product state distributions for direct excitation to NeBr 16≤ ν'≤23. For NeBr, the dominant product channel is Br (ν'-1) for all initial ν'studied, consistent with this complex dissociating primarily via direct VP. © 2010 American Institute of Physics.

Bibliographic Details

Jordan M. Pio; Molly A. Taylor; Wytze E. Van Der Veer; Craig R. Bieler; Jose A. Cabrera; Kenneth C. Janda

AIP Publishing

Physics and Astronomy; Chemistry

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know