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Citation: ZHOU Xiao-Guo, LIU Shi-Lin. Ro-vibrational Analysis of the A²A″ Electronic State of the Vinyl Radical[J]. Acta Physico-Chimica Sinica, ;2006, 22(04): 481-485. doi: 10.3866/PKU.WHXB20060418 shu

Ro-vibrational Analysis of the A²A″ Electronic State of the Vinyl Radical

1.
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China

Received Date: 30 September 2005
Available Online: 10 April 2006

Vinyl radical was generated by photolysing methyl vinyl ketone at 193 nm, then was photodissociated by another tunable laser in the 21180~21320 cm1 range. The dissociated H atom fragments were ionized and detected by resonance-enhanced multiphoton ionization (REMPI) processes. The ro-vibrational action spectra of the A2A″(µ′5,6,8=1)←X2A′(µ″=0) of vinyl radical were recorded by monitoring the H+ ion intensity with dissociation laser wavelength. The corresponding analyses were obtained with the aid of quantum chemical calculations and spectroscopic simulations, vibrational bands and main rotational transitions were definitely assigned. Additionally, the predissociative lifetime was derived from the simulated linewidth, and its dependence on the vibrational mode and rotational quantum number was discussed. The in-plane dissociation mechanism of the state predicted by theoretical studies was confirmed.
- Vinyl radical;Resonance-enhanced multiphoton ionization (REMPI);Pre-dissociation
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Ro-vibrational Analysis of the A2A″ Electronic State of the Vinyl Radical

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通讯作者: 陈斌, bchen63@163.com

Ro-vibrational Analysis of the A²A″ Electronic State of the Vinyl Radical