Infrared double-resonance spectroscopy of bromoform with picosecond pulses |
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| Institution: | 1. Department of Chemistry of Natural and Microbial Products, Pharmaceutical and Drug Industries Research Institute, National Research Centre, 33 El-Behooth St., Dokki, Giza 12622, Egypt;2. Pharmaceutical Technology Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, 33 El-Behooth St., Dokki, Giza 12622, Egypt;3. Department of Microbial Biotechnology, Biotechnology Research Institute, National Research Centre, Dokki, Giza 12622, Egypt;4. Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, October Gardens, 6th of October City, Giza 12578, Egypt;5. Center for X-Ray and Determination of Structure of Matter, Zewail City of Science and Technology, October Gardens, 6th of October, Giza 12578, Egypt;6. Polymer Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), P.O. Box 21934, New Borg El-Arab City, Alexandria, Egypt;7. Medical Biophysics Department, Medical Research Institute, Alexandria University, Egypt;8. Pre-Treatment and Finishing of Cellulosic Fabric Department, Textile Research and Technology Institute (TRT), National Research Center, 33 El-Behooth St., Dokki, Giza 12622, Egypt |
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| Abstract: | Using independently tunable pump and probe pulses in the infrared, time- and frequency-resolved spectroscopy of vibrationally excited, polyatomic molecules in liquids is demonstrated for the first time. Experimental data are presented for CHBr3, measuring the population lifetime via excited-state absorption of the CH-stretching mode; for larger probe delay, the non-equilibrium population of intermediate vibrational levels in the relaxation ladder of bromoform is observed. |
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