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DOI: 10.1039/A607807I (Paper) Reference Section for: J. Mater. Chem., 1997, 7, 1063-1066

Structural study of phosphate groups in layered metal phosphates by high-resolution solid-state31P NMR spectroscopy

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Hirokazu Nakayama, Taro Eguchi, Nobuo Nakamura, Shunro Yamaguchi, Mayumi Danjyo and Mitsutomo Tsuhako

Abstract

In studies of a series of crystals of layered metal phosphate compounds by magic angle spinning (MAS) NMR spectroscopy, it has been found that there is a distinct correlation between the31P isotropic chemical shift value and the type of phosphate group. The isotropic 31P chemical shifts of (H2PO4)- , (HPO4)2- and (PO4)3- groups appear around δ -10, -20 and -30, respectively. These assignments were made unambiguously by measuring the 31P MAS NMR spectra with and without 1H high-power decoupling together with the cross-polarization transfer technique between 1H and 31P nuclei (CP MAS spectra).

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