High resolution 31P NMR study of octacalcium phosphate.
We have assigned the (31)P high-resolution spectrum of octacalcium phosphate by (31)P double quantum and HETCOR spectroscopy. The (31)P peaks at -0.2, 2.0, 3.3 and 3.7 ppm are assigned to P5/P6, P3, P2/P4 and P1, respectively. Our data reveal that substantial amount of the PO(4)(3-) groups at the P2 and P4 sites have been transformed to HPO(4)(2-) in our octacalcium phosphate sample.
Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, Taiwan.
Yao-Hung
YH
Tseng
Jinhua
J
Zhan
Kyle S K
KS
Lin
Chung-Yuan
CY
Mou
Jerry C C
JC
Chan
D002130:Calcium Phosphates / Q000032:analysis* / Q000737:chemistry*; D003461:Crystallography / Q000379:methods; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008968:Molecular Conformation; D010759:Phosphorus Isotopes / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D002130:Calcium Phosphates; D010759:Phosphorus Isotopes; C022045:octacalcium phosphate