When Y zeolites are impregnated with ethanolic acetylacetone, the 29Si and 27Al magic-angle spinning n.m.r. spectra can be used to determine the correct Si/Al framework ratios and to quantify the amount of extra-framework aluminiums; evidence suggests that this impregnation does not cause further dealumination of the zeolitic material.
P. J. Grobet, H. Geerts, J. A. Martens and P. A. Jacobs, J. Chem. Soc., Chem. Commun., 1987, 1688 DOI: 10.1039/C39870001688
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