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NMR and IR studies of hydroxyl groups in CaNa and MgNa forms of zeolites A

✍ Scribed by M. Pruski; H. Ernst; H. Pfeifer; B. Staudte

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 355 KB
Volume: 119
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(85)80445-0

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✦ Synopsis

By measurement of MAS prol@n magneuc resonance and near-infrared spes~ra. the ex~sw.ncc of bridging hydroxyl groups in MgNaA and CaNaA zeohle~ 1s excluded. The MAS proton magnclic resonance lines observed ar 2.5-3 ppm for CaNaA and at 3.5 pprn ror MgNaA (apart from the small contribuGons of "~erminnl~' OH groups) and the corrcspondlng bands a, 4576 and 4525 cm-' WI the near-infrared spectra are altribuled IO hydroxyl groups atrached 10 rhc cxchangsable csrions

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