title: 31P-19F rotational-echo, double-resonance nuclear magnetic resonance experiment on fluoridated hydroxyapatite.
abstract: This work demonstrates 31P-19F rotational-echo, double-resonance nuclear magnetic resonance (REDOR NMR), a simple experiment used to measure 31P-19F dipolar couplings. 19F-observed 31P-19F REDOR NMR of fluorapatite revealed the 31P-19F connectivities. 31P-observed 31P-19F REDOR NMR determined the nearest 31P-19F distance in fluorapatite. The application on fluoride-treated hydroxyapatite, the principal inorganic constituent of dental enamel and dentine, showed the formation of fluorohydroxyapatite with a surface coverage of less than one unit-cell layer.
authors.affiliation: Miami Valley Laboratories, Procter and Gamble Company, Cincinnati, OH 45253-8707, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Pan
mesh_terms: D001031:Apatites / Q000737:chemistry*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*
chemical_list: D001031:Apatites; C025105:fluorapatite