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 Physics and Astronomy Atomic and Molecular Physics and Spectroscopy |
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Raman Study of Solid State Reactions
Authors: Paras N. Prasad; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY |
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Abstract: The mechanisms and the reaction dynamics of several solid state reactions were investigated. The thermal rearrangement reaction of methyl-p- dimethylaminobenzene sulfonate (MSE) in pure crystal to form the product p- trimethylammonium benzene sulfonate Zwitterion (ZWT) was investigated during this period. Detailed studies of the phonon spectra as well as the internal vibration spectra were made as a function of the percentage rearrangement using polycrystalline samples as well as single crystals in different orientations. Solid state photodimerization of two modifications of trans-cinnamic acids in pure crystal was investigated. Also, the topotactic transformation reaction of iodobenzoyl peroxide was investigated. This reaction is thermally enhanced and yields a number of products. An important aspect of a dynamical model is to determine specificity in phonon induction of solid state reactions. In order that a large population of selective and coherent vibrational excitation can be achieved to study its effect on reactivity it is necessary that vibrational relaxation be slow. The dephasing of a localized internal vibration of the naphtalene crystal was investigated by studying the temperature dependence of the line width, the line shape and the line frequency. (AW)
| Description: |
Final rept. 1 Sep 79-31 Aug 80 |
| Pages: |
11 |
| Report Date: |
31 AUG 80 |
| Contract Number: |
F49620-79-C-0229 |
| Report Number: |
A041702 |
Report Unavailable |
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