Mapping out the connectivities in intermediate gel phases of molecular sieve synthesis by solid-state NMR

The present communication demonstrates, for the first time, that P-31/(27) Al double resonance solid-state NMR experiments such as cross-polarization (CP) can be used to map out the connectivity in the intermediate gel phases of molecular sieve synthesis. Our work clearly highlights the advantages o f using Al/P CP techniques for characterizing the gel phases. (C) 2001 Else vier Science B.V. All rights reserved.