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Acta Physico-Chimica Sinca  2017, Vol. 33 Issue (3): 500-505    DOI: 10.3866/PKU.WHXB201611111
ARTICLE     
Multiphoton Dissociation and Ionization Dynamics of Allyl Chloride Using Femtosecond Laser Pulses
1 College of Science, Huazhong Agricultural University, Wuhan 430070, P. R. China
2 Institute of Applied Physics, Huazhong Agricultural University, Wuhan 430070, P. R. China
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Abstract  

The dissociation and photoionization dynamics of C3H5Cl were studied at 200, 400, and 800 nm with femtosecond laser pulses. The time-of-flight mass spectra, laser power index and photoelectron images were recorded. At short wavelength (200 nm), ionization of the parent molecule was found to be the dominant channel, while other ions were generated by the dissociation of C3H5Cl+. With the shift to long wavelength (e.g., 800 nm), fragment ions became dominant, and were generated through the multiphoton ionization of neutral fragments after the photodissociation of C3H5Cl. These results imply that photodissociation plays a significant role at long wavelength, because neutral fragments are supposed to be generated from the intermediate states reached by 800 nm photons. At 400 nm, the dissociation on the intermediate states is also critical, but is not as high as that at 800 nm. Taken together, our results demonstrate that the dissociation/ionization behaviors of allyl chloride are wavelength-dependent, and reveal the complex dynamics of allyl chloride at 200, 400 and 800 nm.



Key wordsFemtosecond laser pulse      Time-of-flight mass spectrometry      Photoelectron imaging      Allyl chloride      Multiphoton dissociation and ionization     
Received: 12 October 2016      Published: 11 November 2016
MSC2000:  O643  
  O433  
  O561  
Fund:  the National Natural Science Foundation of China(21403080);the National Natural Science Foundation of China(61308028);Specialized Research Fund for the Doctoral Program of Higher Education, China(20130146120015)
Cite this article:

. Multiphoton Dissociation and Ionization Dynamics of Allyl Chloride Using Femtosecond Laser Pulses. Acta Physico-Chimica Sinca, 2017, 33(3): 500-505.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201611111     OR     http://www.whxb.pku.edu.cn/Y2017/V33/I3/500

 
Wavelength/nm Branch ratio
C3H5Cl+ C3H5+ C3H4+ C2H3+ CH2+
800 17.06% 53.26% 19.76% 1.88% 1.12%
400 30.31% 37.69% 15.23% 2.13% 1.75%
200 55.26% 15.97% 9.98% 4.75% 2.98%
 
 
 
 
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