Low-temperature infrared spectra and hydrogen bonding in polycrystalline dl-serine and deuterated derivatives

S. Jarmelo, I. Reva, M. Rozenberg, P. R. Carey, R. Fausto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The FT-IR spectra of polycrystalline dl-serine [α-amino-β-hydroxypropionic acid; HO-CH2-CH(NH3)+-COO-] and isotopically substituted [ND/ODAlcohol (<10% and >90% D); CD2 (>98% D)] dl-serine were recorded in the range 4000-500 cm-1 in the temperature range 300-10 K, and fully assigned. The isotopic-doping/low-temperature methodology, which allows for decoupling of individual proton vibrational modes from the crystal bulk vibrations, was used to estimate the energies of the different H-bonds present in dl-serine crystal. To this end, the frequency shifts observed in both the NH/OH stretching and out-of-plane bending spectral regions (relatively to reference values for these vibrations in non-hydrogen-bonded dl-serine molecules) were used, together with previously developed empirical correlations. The results are compared with available structural data on this amino acid.

Original languageEnglish
Pages (from-to)73-82
Number of pages10
JournalVibrational Spectroscopy
Volume41
Issue number1
DOIs
StatePublished - 30 May 2006

Keywords

  • dl-serine
  • H-bonding
  • Isotopic dilution
  • Low-temperature IR spectra

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