C-13 MAS NMR OF ORGANIC TEMPLATES IN ZEOLITES

Cross-polarization (CP) combined with magic-angle spinning (MAS) is th e most popular technique used for the high-resolution solid C-13 study Of occluded templates in zeolitic materials. Depending on the mobilit y of the incorporated templates the high-power decoupling (DEC) techni que is more suitable to detect and to quantify templates in zeolites. By this technique, high-resolution MAS NMR spectra, displaying quantit ative reliable C-13 Signal intensities of the occluded templates, are obtained in ZSM-5, SAPO-37 and the mazzite structure. (C) 1998 Elsevie r Science B.V. All rights reserved.