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Citation: LIU Ning-Liang, SHEN Huan. Multiphoton Dissociation and Ionization Dynamics of Allyl Chloride Using Femtosecond Laser Pulses[J]. Acta Physico-Chimica Sinica, ;2017, 33(3): 500-505. doi: 10.3866/PKU.WHXB201611111 shu

Multiphoton Dissociation and Ionization Dynamics of Allyl Chloride Using Femtosecond Laser Pulses

LIU Ning-Liang ^1,2, ,
SHEN Huan ^1,2

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

Received Date: 12 October 2016
Revised Date: 11 November 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21403080,61308028) and Specialized Research Fund for the Doctoral Program of Higher Education,China (20130146120015)

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.
- Femtosecond laser pulse,
- Time-of-flight mass spectrometry,
- Photoelectron imaging,
- Allyl chloride,
- Multiphoton dissociation and ionization
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