Overtone spectra of styrene and polystyrene in the visible and near infrared regions |
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| Authors: | T M Abdul Rasheed K P B Moosad V P N Nampoori K Sathianandan |
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| Institution: | (1) Department of Physics, Cochin University of Science and Technology, 682 082 Cochin, India;(2) Present address: Department of Physics, M.G.G.A. College, 673 311 Mahe, India;(3) Present address: Department of Physics, Kerala University Centre, 695 581 Kariavattom, Trivandrum, India |
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| Abstract: | Vibrational overtone spectra of styrene (liquid) and polystyrene (solid), studied by the laser-induced thermal lens (for ΔV=6) and the conventional near infrared absorption (for ΔV=3–5) techniques, are reported. For polystyrene, the overtone energy-bond length correlation predicts that the aryl CH bonds are ～0.0005 Å longer than that in benzene, while no such conclusions could be drawn on styrene. Thesp 3 CH overtones in polystyrene are observed on the low energy side of the aryl CH overtones. |
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| Keywords: | Overtone spectroscopy CH bond lengths thermal lens technique |
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