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Natural abundance Ca-43 NMR study of calcium-containing organic solids : a model study for Ca-binding biomaterials

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<mark>Journal publication date</mark>2006
<mark>Journal</mark>Chemical Physics Letters
Issue number1-3
Volume427
Number of pages5
Pages (from-to)201-205
Publication StatusPublished
<mark>Original language</mark>English

Abstract

As a first step for probing Ca sites in biomolecules using solid-state Ca-43 NMR spectroscopy, natural abundance Ca-43 NMR data of calcium-containing organic solids is reported. The Ca-43 NMR interaction parameters indicate small electric field gradients and a relatively small chemical shift range for the calcium sites in these bio-related model compounds. A correlation of the Ca-43 isotropic chemical shift with Ca-O distance is found: the Ca-43 shift increases as the mean Ca-O distance decreases, with a strong deshielding being observed for calcium with strong Ca-O bonds (distance <2.4,angstrom) in both organic and inorganic materials.