Quantitative infrared photochemistry with CO2 laser of different temporal shape: Dissociation of CF3I with nanosecond pulses |
| |
| Institution: | 1. Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, United States;2. IN+ Center for Innovation, Technology and Policy Research, LARSyS, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisbon, Portugal;3. NOVA Information Management School (NOVA IMS), Universidade Nova de Lisboa, Campus de Campolide, 1070-312, Lisbon, Portugal;4. Avenue C Advisors, LLC, Pittsburgh, PA, 15228, United States;1. Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Dow Chemical Company Limited, No. 936, Zhang Heng Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China;3. The Dow Chemical Company, Midland, MI 48674, USA;1. Chair of Metallic Materials, Saarland University, Campus C6.3, 66123 Saarbrücken, Germany;2. Materials Physics Center (CFM/MPC), Paseo Lardizabal 5, 20018 San Sebastián, Spain;3. Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain;4. Heinz Maier-Leibnitz Zentrum (MLZ) and Physik Department, Technische Universität München, Lichtenbergstrasse 1, 85748 Garching, Germany;5. Fem Research Institute for Precious Metals & Metals Chemistry, Katharinenstrasse 17, 73525 Schwäbisch Gmünd, Germany;6. ESRF—The European Synchrotron, CS40220, 38043 Grenoble, France;7. Heraeus Additive Manufacturing GmbH, Heraeusstrasse 12-14, 63450 Hanau, Germany;8. Institute of Light and Matter, UMR5306 Université Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France |
| |
| Abstract: | Infrared laser pulses of different temporal pulse shape with a length of 2–50 ns and a nominal power of 100–1000 MW are generated by a TEA CO2 laser oscillator combination using saturable intracavity absorbers and a fast CdTe electro-optical switch. The multiphoton dissociation of CF3I + nhv → CF3 + I at 1074.6 cm−1 and p(CF3I) = 10 Pa was studied using these pulses. The product yields and the absolute rate constants were determined for different temporal pulse profiles, showing clear intensity effects at low intensities and a transition to a linear intensity regime at higher intensities. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
