Moonsoo Park, Keon Woo Lee, K. Jung
Jun 4, 2001
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0
Influential Citations
31
Citations
Journal
Journal of Chemical Physics
Abstract
The photodissociation dynamics of allyl bromide and chloride have been investigated at 234 nm using a two-dimensional photofragment ion imaging technique coupled with a [2+1] resonance-enhanced multiphoton ionization scheme. After absorbing a photon, allyl bromide dissociates into C3H5+Br(2Pj;j=1/2,3/2) exclusively via the repulsive surfaces. The enhanced contribution of the singlet state to the initial transition is attributed to intensity borrowing from the nearby 1(π,π*) state. Trimodal translational energy distributions of Cl(2Pj;j=1/2,3/2) have been observed after the photolysis of allyl chloride. Low-velocity components with Boltzmann shapes are produced via internal conversion between the initially pumped 1(π,π*) state and the vibrationally excited ground state. Middle-velocity components with Gaussian shapes originated from curve crossing between the bound 1(π,π*) state and the dissociative 1(π,σ*) state. High-velocity components are produced via curve crossing from the 1(π,π*) state to the 1(n,σ*...