Applications of NMR Crystallography to Problems in Biomineralization: Refinement of the Crystal Structure and P-31 Solid-State NMR Spectral Assignment of Octacalcium Phosphate

Erika Davies, Melinda J. Duer*, Sharon E. Ashbrook, John M. Griffin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)

Abstract

By combining X-ray crystallography, first-principles density functional theory calculations, and solid-state nuclear magnetic resonance spectroscopy, we have refined the crystal structure of octacalcium phosphate (OCP), reassigned its P-31 NMR spectrum, and identified an extended hydrogen-bonding network that we propose is critical to the structural stability of OCP. Analogous water networks may be related to the critical role of the hydration state in determining the mechanical properties of bone, as OCP has long been proposed as a precursor phase in bone mineral formation. The approach that we have taken in this paper is broadly applicable to the characterization of crystalline materials in general, but particularly to those incorporating hydrogen that cannot be fully characterized using diffraction techniques.

Original languageEnglish
Pages (from-to)12508-12515
Number of pages8
JournalJournal of the American Chemical Society
Volume134
Issue number30
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • 1ST PRINCIPLES CALCULATIONS
  • SURFACE
  • SPECTROSCOPY
  • TRANSFORMATION
  • 1ST-PRINCIPLES CALCULATIONS
  • HYDROXYAPATITE
  • PARAMETERS
  • MAS NMR
  • O-17

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