On the ionization energies of C4H3 isomers
نویسندگان
چکیده
Article history: Received 7 November 2009 In final form 9 December 2009 Available online 22 December 2009 0009-2614/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.cplett.2009.12.027 * Corresponding author. E-mail address: [email protected] (R.I. Kaiser). We have investigated the ionization potentials of resonantly stabilized C4H3 radicals utilizing laser ablation of graphite in combination with seeding the ablated species in neat methylacetylene gas, which also reacted as a reagent. Photoionization efficiency (PIE) curves were recorded of photoionized isomers at the Advanced Light Source. The PIE curve suggests the formation of four C4H3 radicals: two acyclic structures i-C4H3 [1] and E/Z-n-C4H3 [2E/2Z] and two cyclic isomers 3 and 4. This study provides a novel interpretation of previous data on C4H3 radicals in hydrocarbon flames. 2009 Elsevier B.V. All rights reserved.
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