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Low-frequency vibrational spectra of some homopolypeptides in the solid state

✍ 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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✦ Synopsis


Abstract

Low‐frequency Raman and far‐infrared spectra of polyglycine, poly‐L‐alanine, and poly‐L‐valine have been measured. The Raman spectra exhibit an intense band near 100 cm^βˆ’1^ 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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