The high-frequency hydroxy region in H–Y zeolites; a comment on a previous communication and corrigendum

Abstract

Deconvolution of the high-frequency (h.f.) i.r. hydroxy and deuteroxy stretching bands of H–Y and Na/H–X zeolites, using enhanced resolution Fourier Transform (F.T.) i.r. spectroscopy shows that more than one band may be recognised in some compositions, including the parent Y zeolite, in a previous communication up to five components having been reported; the previous results, for the hydroxy region, were influenced by incomplete compensation for water bands, and clear evidence is presented for the existence of two types of silanol in Y zeolites dealuminated with SiF₆^2–.