Two-Dimensional Triple-Quantum 27Al MAS NMR Spectroscopic Study of the High-Temperature Phase Transformation of Microporous VPI-5

Two-Dimensional Triple-Quantum 27Al MAS NMR Spectroscopic Study of the High-Temperature Phase Transformation of Microporous VPI-5

Two-dimensional (2D) triple-quantum 27Al magic-angle spinning (3Q MAS) NMR spectra of VPI-5 have been recorded in situ at room temperature and 85 °C. The results confirm that at 70−80 °C VPI-5 undergoes a reversible phase transformation from space group P63 to P63 cm. This is the first study of a ph...

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Veröffentlicht in:Journal of physical chemistry (1952) 1996-11, Vol.100 (45), p.17889-17892
Hauptverfasser: Rocha, João, Esculcas, Ana P, Fernandez, Christian, Amoureux, Jean-Paul
Format: Artikel
Sprache:eng
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Zusammenfassung:Two-dimensional (2D) triple-quantum 27Al magic-angle spinning (3Q MAS) NMR spectra of VPI-5 have been recorded in situ at room temperature and 85 °C. The results confirm that at 70−80 °C VPI-5 undergoes a reversible phase transformation from space group P63 to P63 cm. This is the first study of a phase transformation by 2D MQ MAS NMR spectroscopy.
ISSN:0022-3654
1541-5740
DOI:10.1021/jp9613504