Mechanism of the ultraviolet photodissociation of chloroethylenes determined from the Doppler profiles, spatial anisotropy, and power dependence of the photofragments

Doppler profiles of chlorine and hydrogen atomic fragments produced in the photodissociation of mono- and dichloroethylenes at 193 nm have been measured in a pump-and-probe experiment using 2+1 resonance-enhanced multiphoton ionization. In a second experiment, the angular distributions of the Cl fra...

Full description

Bibliographic Details
Published in:The Journal of Chemical Physics : bridges a gap between journals of physics and journals of chemistry, Vol. 97, No. 7 (1992), p. 4815-4826
Other Involved Persons: Mo, Yuxiang ; Tonokura, Kenichi ; Matsumi, Yutaka ; Kawasaki, Masahiro ; Sato, Tetsuya ; Arikawa, Tatsuo ; Reilly, Peter T. A. ; Xie, Yongjin ; Yang, Yung-an ; Huang, Yibo ; Gordon, Robert J.
Format: electronic Article
Language:English
ISSN:1089-7690
Physical Description:Online-Ressource
DOI:10.1063/1.463836
QR Code: Show QR Code
LEADER 03092nma a2200433 c 4500
001 NLEJ218812442
003 DE-601
005 20100422024456.0
007 cr uuu---uuuuu
008 081125s1992 000 0 eng d
024 7 |a 10.1063/1.463836  |2 doi 
024 8 |a aip20081121000081818 
040 |b ger  |c GBVCP 
041 0 |a eng 
084 |a aip  |2 natliz 
084 |a phy  |a che  |q DE-601  |2 z 
245 0 0 |a Mechanism of the ultraviolet photodissociation of chloroethylenes determined from the Doppler profiles, spatial anisotropy, and power dependence of the photofragments  |h Elektronische Ressource 
300 |a Online-Ressource 
520 |a Doppler profiles of chlorine and hydrogen atomic fragments produced in the photodissociation of mono- and dichloroethylenes at 193 nm have been measured in a pump-and-probe experiment using 2+1 resonance-enhanced multiphoton ionization. In a second experiment, the angular distributions of the Cl fragments produced from chloroethylenes at 235 and 238 nm were measured using a perfect-focusing mass spectrometer. In a third experiment, we measured the power dependence of the relative yields of H, Cl, HCl, and HCl+ produced from vinyl chloride at 193 nm. For Cl detachment, two primary processes have been confirmed. One produces an isotropic angular distribution of photofragments, while the other produces an anisotropic distribution. For H atom detachment, an isotropic angular distribution and a Boltzmann velocity distribution were found. The ratio of yields of the Cl and H fragments was found to be 4±1 for CH2CCl2 and higher than 10 for t-CHClCHCl and CCl2CClH. The H, Cl, and HCl yields were found to be first order in laser intensity, while the HCl+ yield was found to be third order. Saturation measurements of the ion yield indicate that the latter results from a 1+1+1 resonance-enhanced process involving a bound state of the parent molecule. This intermediate state may also be responsible for producing the statistical component of the Cl atom product. 
533 |a Online edition  |f AIP Digital Archive ; 041004-4 
700 1 |a Mo, Yuxiang 
700 1 |a Tonokura, Kenichi 
700 1 |a Matsumi, Yutaka 
700 1 |a Kawasaki, Masahiro 
700 1 |a Sato, Tetsuya 
700 1 |a Arikawa, Tatsuo 
700 1 |a Reilly, Peter T. A. 
700 1 |a Xie, Yongjin 
700 1 |a Yang, Yung-an 
700 1 |a Huang, Yibo 
700 1 |a Gordon, Robert J. 
773 0 8 |i In  |t The Journal of Chemical Physics : bridges a gap between journals of physics and journals of chemistry  |d College Park, Md. : Inst.  |g Vol. 97, No. 7 (1992), p. 4815-4826  |q 97:7<4815-4826  |w (DE-601)NLEJ217994202  |x 1089-7690 
856 4 0 |u http://dx.doi.org/10.1063/1.463836 
901 |a OLC 
912 |a ZDB-1-AIP 
912 |a GBV_NL_ARTICLE 
950 |a ULTRAVIOLET RADIATION  |a ETHYLENE  |a ORGANIC CHLORINE COMPOUNDS  |a DOPPLER EFFECT  |a ANISOTROPY  |a SPATIAL DISTRIBUTION  |a ENERGY DEPENDENCE  |a CHLORINE  |a HYDROGEN  |a FRAGMENTATION  |a RESONANCE  |a MULTI−PHOTON PROCESSES  |a PHOTOIONIZATION  |a ANGULAR DISTRIBUTION  |2 AIP 
951 |a AR 
952 |d 97  |j 1992  |e 7  |h 4815-4826  |g 12