The infrared and Raman spectra of histamine dihydrochloride and its N -deuterated derivative were recorded in the solid state. Raman spectra of samples dissolved in both normal and heavy water were also obtained. A general assignment of the fundamental vibrations of this cationic species of the hist
β¦ LIBER β¦
Low-frequency vibrational spectra of some homopolypeptides in the solid state
β Scribed by Bruno Fanconi
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1973
- Tongue
- English
- Weight
- 798 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0006-3525
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β¦ Synopsis
Abstract
Lowβfrequency Raman and farβinfrared spectra of polyglycine, polyβLβalanine, and polyβLβvaline have been measured. The Raman spectra exhibit an intense band near 100 cm^β1^ for these homopolypeptides. Lattice calculations of the polyglycines are used to assign the intense Raman band to a rotary lattice mode. For homopolypeptides in the Ξ² conformation, an infrared band is observed whose frequency varies inversely with the square root of the mass of the peptide repeating unit. This infrared band is assigned to the hydrogen bond stretching lattice vibration.
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