Abstract
IN recent years, high-resolution solid-state NMR spectroscopy has emerged as a complementary technique to diffraction measurements for the investigation of solid-state structures, the former probing local environments and the latter long-range periodicities and orderings. For zeolites, where the small size of the particles limits the quality of the diffraction data, information from NMR studies has been particularly valuable. Here we demonstrate that two-dimensional COSY (correlation spectroscopy) NMR may be used for natural abundances of 29Si in the solid state to establish the three-dimensional lattice connectivities within these structures, and we present the direct observation of 29Si–O– 29Si couplings. These measurements greatly extend the potential of the NMR method in the study of zeolites and should be applicable to a variety of other three-dimensional lattice structures containing NMR-active nuclei.
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Fyfe, C., Gies, H., Feng, Y. et al. Determination of three-dimensional lattice connectivities in zeolites using natural-abundance 29Si two-dimensional NMR and the direct observation of 29Si–0–29Si couplings. Nature 341, 223–225 (1989). https://doi.org/10.1038/341223a0
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DOI: https://doi.org/10.1038/341223a0
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