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Quasi elastic and inelastic neutron scattering study of vitamin C aqueous solutions

Author

Listed:
  • Migliardo, F.
  • Branca, C.
  • Magazù, S.
  • Migliardo, P.
  • Coppolino, S.
  • Villari, A.
  • Micali, N.

Abstract

In this paper, new results obtained by quasi elastic and inelastic neutron scattering experiments performed on vitamin C (L-ascorbic acid)/H2O mixtures are reported. The data analysis of the QENS measurements, by a separation of the diffusive dynamics of hydrated L-ascorbic acid from that of water, furnishes quantitative evidences of a random jump diffusion motion of vitamin C and shows that the water dynamics is strongly affected by the presence of L-ascorbic acid. Concerning the INS experiment, we are able, through the behaviour of neutron spectra across the glass transition temperature (Tg≈233K for the vitamin C/water system), to collocate the investigated system in the Angell “strong-fragile” scheme.

Suggested Citation

  • Migliardo, F. & Branca, C. & Magazù, S. & Migliardo, P. & Coppolino, S. & Villari, A. & Micali, N., 2002. "Quasi elastic and inelastic neutron scattering study of vitamin C aqueous solutions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 304(1), pages 294-298.
    • Handle: RePEc:eee:phsmap:v:304:y:2002:i:1:p:294-298
    DOI: 10.1016/S0378-4371(01)00521-0
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