Sorbate-induced changes in the 29Si MAS NMR spectrum of highly siliceous MCM-22

Abstract

Sorption of organics, such as 2,4-pentanedione and toluene, cause distinct and reversible changes in the ²⁹Si MAS NMR spectrum of highly siliceous MCM-22 that are characteristic of perturbations in local geometry. These subtle spectral features further substantiate the presence of the modified dodecasil-1H cage in the MCM-22 framework.