Deconvolution of the high-frequency infrared hydroxy stretching band of NaHY shows that the bond envelope is made up of five major components, and dealumination via Si substitution using (NH4)2SiF6 leads to a decrease in the intensity of the high-frequency components; HZSM-20 is shown to possess hydroxy band properties similar to those observed in high-silica HY zeolites.
J. Dwyer, K. Karim, W. Kayali, D. Millward and P. J. O'Malley, J. Chem. Soc., Chem. Commun., 1988, 594 DOI: 10.1039/C39880000594
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