Aspects of the characterization of cloverite by solid-state n.m.r. techniques

Zibrowius, Bodo; Anderson, Michael W.; Schmidt, Wolfgang; Schüth, Franz-Ferdinand; Aliev, Abil E.; Harris, Kenneth D. M.

doi:10.1016/0144-2449(93)90131-L

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Aspects of the characterization of cloverite by solid-state n.m.r. techniques

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Zibrowius, B., Anderson, M. W., Schmidt, W., Schüth, F.-F., Aliev, A. E., & Harris, K. D. M. (1993). Aspects of the characterization of cloverite by solid-state n.m.r. techniques. Zeolites, 13(8), 607-610. doi:10.1016/0144-2449(93)90131-L.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-1DFF-C

Abstract

Microporous gallophosphate cloverite has been studied by multinuclear (¹³C, ¹⁹F, ³¹P, ⁷¹Ga) solid-state n.m.r. spectroscopy. An extraordinarily strong quadrupolar coupling is shown to be the reason for a misleading line shape in ⁷¹Ga MAS n.m.r. spectra. Using static ⁷¹Ga n.m.r. spectroscopy, an estimate of the size of this quadrupolar coupling can be obtained. The limitations of the MAS technique for the study of quadrupolar nuclei in sites with very large quadrupolar couplings are addressed.