Low frequency raman spectra of isotopic mixed benzophenone crystals |
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Authors: | P. Ranson P. Peretti Y. Rousset |
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Affiliation: | Département de Recherches Physiques, Université de Paris VI, Laboratoire associé au C.N.R.S., 75230 Paris Cedex 05, France;Laboratoire d''Optique Moléculaire, Université de Reims, Reims, France |
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Abstract: | In this paper, we present an experimental study of vibrational lattice modes in isotopic mixed crystals of benzophenone-h10 and -d10. Our results are discussed using theoretical and experimental data concerning other molecular isotopic mixed crystals. The spectra show two regions; in the first (ν < 100 cm?1) we did not observe an interaction between the various vibrational lattice bands; in the second region (ν > 100 cm?1), the interaction appears clearly. The 111.5 cm?1 and 73 cm?1 torsional modes of benzophenone-h10 have the same behaviour as the external modes throughout the whole concentration range (0–100% of benzophenone-d10). |
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