The high-field (9.4 T)29Si m.a.s. n.m.r. spectrum (m.a.s. = magic angle spinning) of highly siliceous ZSM-5 (silicalite) shows that changes in the zeolite structure occur when sorbate molecules are present; these changes occur at low loading levels and are characteristic of the nature of the sorbed molecules, and X-ray diffraction confirms that the effect is a perturbation of the zeolite structure itself.
C. A. Fyfe, Gordon. J. Kennedy, C. T. De Schutter and G. T. Kokotailo, J. Chem. Soc., Chem. Commun., 1984, 541 DOI: 10.1039/C39840000541
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