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Citation: Hou Zhenglin, Gu Yuezhu*, Liu Chuanpu, Yin Yongjia. THE STUDIES ON CHANNEL COMPETITION KINETICS OF LASER INDUCED DECOMPOSITION OF FREON-114[J]. Acta Physico-Chimica Sinica, ;1988, 4(02): 187-193. doi: 10.3866/PKU.WHXB19880214 shu

THE STUDIES ON CHANNEL COMPETITION KINETICS OF LASER INDUCED DECOMPOSITION OF FREON-114

1.
Chemistry Department; Shandong University; Jinan

Received Date: 10 November 1986
Available Online: 15 April 1988

Freon-114 (CClF_2CClF_2) with a pressure of 10 Torr is irradiated by means of a pulsed CO_2 laser at 10.6μm and 9.6μm, each of which corresponds to a specific C—F stretching band of gauche isomer. At both wavelengths, the reaction products are always CF_2Cl_2 and C_2F_4, which result from two different decomposition channels i.e. C—C bond breaking and C—Cl bond breaking. There is thermal effect in the laser induced decomposition of Freon-114, which may be approximately described by an Arrhenius formula. The activation energy E_a of laser induced decomposition for the two different channels canbe estimated from the experimental results. The values of E_a are approximately equal to that obtained from thermal decomposition. At the same time, the channel competition processes of unimolecular laser induced decomposition of Freon-114 can be interpreted by the RRKM theory of unimolecular reaction and the calculated results are in agreement with the experimental results.
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