Vibrational dynamics and heat capacity of polyglycine I

Vikas Porwal, Radha Mohan Misra, Poonam Tandon, Vishwambhar Dayal Gupta
2004 Indian Journal of Biochemistry & Biophysics  
Earlier works on polyglycine I suffer from several infirmities, such as the dynamic methylene group being replaced by a mass unit and the use of poorly resolved inelastic neutron spectra, which have resulted in wrong assignments and imprecise profile of dispersion curves. In addition, the density-of-states and heat capacity variation as a function of temperature are being reported for the first time. The heat capacity is in good agreement with the measurements reported earlier by Roles and
more » ... rlich within a certain range (230-350 K). Deviations set in beyond this could be due to the presence of two crystalline states (I and II) in the sample used for the heat capacity measurements.
pmid:22896906 fatcat:i5axbysonncvraelz6lzbt6p5y