2-DIMENSIONAL TRIPLE-QUANTUM AL-27 MAS NMR SPECTROSCOPIC STUDY OF THEHIGH-TEMPERATURE PHASE-TRANSFORMATION OF MICROPOROUS VPI-5

Authors
ROCHA J ESCULCAS AP FERNANDEZ C AMOUREUX JP
Citation
J. Rocha et al., 2-DIMENSIONAL TRIPLE-QUANTUM AL-27 MAS NMR SPECTROSCOPIC STUDY OF THEHIGH-TEMPERATURE PHASE-TRANSFORMATION OF MICROPOROUS VPI-5, Journal of physical chemistry, 100(45), 1996, pp. 17889-17892
Citations number
12
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
100
Issue
45
Year of publication
1996
Pages
17889 - 17892
Database
ISI
SICI code
0022-3654(1996)100:45<17889:2TAMNS>2.0.ZU;2-I
Abstract
Two-dimensional (2D) triple-quantum Al-27 magic-angle spinning (3Q MAS ) NMR spectra of VPI-5 have been recorded in situ at room temperature and 85 degrees C. The results confirm that at 70-80 degrees C VPI-5 un dergoes a reversible phase transformation from space group P6(3) to P6 (3)cm. This is the first study of a phase transformation by 2D MQ MAS NMR spectroscopy.