Infrared spectroscopic studies of C,O films show variation in absorbance and linewidth of the bands across the orientational phase transitions around 280 and 340 K. There is some evidence for the coexistence of phases in the 210-270 K region and for the occurrence of another transition below 200 K.
An infrared spectroscopic study of the phase transitions of crystalline aromatic donor—acceptor complexes involving a pseudoplastic state
✍ Scribed by H.Ramachandra Swamy; Somnath Ganguly; C.N.R. Rao
- Book ID
- 103907212
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 383 KB
- Volume
- 39
- Category
- Article
- ISSN
- 1386-1425
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✦ Synopsis
Variable temperature i.r. spectroscopic studies of weak x-donor-n-acceptor complexes in the crystalline state indicate that the complexes undergo orderdisorder transitions, the disorder being caused by molecular motion. Thermodynamicdata on the phase transitions along with the spectral data suggest that the high-temperature crystalline forms of the complexes are likely to be pseudoplastic.
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