Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Dynamics of Br(2Pj) Formation in the Photodissociation of Bromobenzene

  • Paul, Dababrata (Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University) ;
  • Kim, Hyun-Kook (Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University) ;
  • Hong, Ki-Ryong (Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University) ;
  • Kim, Tae-Kyu (Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University)
  • Received : 2010.12.15
  • Accepted : 2011.01.14
  • Published : 2011.02.20
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Abstract

The photodissociation dynamics of bromobenzene near 234 nm has been investigated using a two-dimensional photofragment ion-imaging technique coupled with a state-selective [2+1] resonance-enhanced multiphoton ionization (REMPI) scheme. The nascent Br atoms are produced by the primary C-Br bond dissociation, which leads to the formation of $C_6H_5$ ($\tilde{X}$) and Br($^2P_j$, j = 1/2, 3/2). The observed translational energy distributions have been fitted by a single Boltzmann function and two Gaussian functions. Trimodal translational energy distributions of Br($^2P_j$) have been assigned to the direct/indirect dissociation mechanisms originating from the initially excited $^3({\pi},{\pi}^*)$ state. The assignments have been confirmed by the recoil anisotropy and distribution width corresponding to the individual components.

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References

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