Frequency dependent kinetics of the cw CO2 laser induced reaction of CF3Br |
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| Institution: | 1. Monash School of Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia;2. Centre for Health Economics, Monash Business School, Monash University, Clayton, Victoria, Australia;3. Dermatology Department, Alfred Hospital, Prahan, Victoria, Australia;4. Sinclair Dermatology, East Melbourne, Victoria, Australia;1. College of Information Science and Engineering, Changsha Normal University, Changsha, 410100, China;2. State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science & Engineering, Zhejiang University, Hangzhou, 310027, China;3. State Key Laboratory of Chemo, Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, Hunan, China |
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| Abstract: | Kinetics of the decomposition of CF3Br at 20 torr by a cw CO2 laser have been studied over the range of laser frequencies 1043–1085 cm-1. At constant translational temperature the change in the rate constant with laser frequency over the frequency range is a factor of 500, comparable to the effect previously observed in CF2ClCF2Cl and CF3CF2Cl. Arrhenius plots show an activation energy of 64.9 kcal/mole, independent of frequency. The laser induced optical absorption of CF3Br exhibits a hysteresis effect at the lower laser frequencies. |
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