High resolution sup 27 Al NMR spectroscopy of the aluminophosphate molecular sieve VPI-5

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Nature (London); (United Kingdom)

DOI:https://doi.org/10.1038/346550a0· OSTI ID:7291844

Wu, Y; Chmelka, B F; Pines, A ^[1]; Davis, M E ^[2]; Grobet, P J; Jacobs, P A ^[3]

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1. Lawrence Berkeley Lab., CA (United States)
2. State Univ., Blacksburg, VA (United States)
3. Catholic Univ. of Leuven (Belgium)

Aluminium plays an important part in determining the properties of many materials, such as the catalytic behavior of zeolites. Aluminophosphate molecular sieves, in particular, have useful applications as superlattice hosts in the fabrication of quantum-effect devices. Although nuclear magnetic resonance (NMR) spectroscopy is often a sensitive probe of solids, the use of {sup 27}Al NMR to investigate the structure of aluminosilicates and aluminophosphates has been severely limited because anisotropic second-order quadrupolar interactions, responsible for spectral broadening, cannot be eliminated by conventional magic-angle-spinning or multiple-pulse techniques. Here the authors report the first high-resolution NMR spectra of {sup 27}Al in a solid using double rotation and demonstrate its usefulness for probing subtle structural perturbations in the aluminophosphate molecular sieve VPI-5. From their results, they conclude that high-resolution {sup 27}Al NMR is capable of resolving discrete framework aluminium sites, permitting quantitative investigation of site-specific adsorbate interactions with the VPI-5 host.

• OSTI ID: 7291844
• Journal Information: Nature (London); (United Kingdom), Vol. 346:6284; ISSN 0028-0836
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM PHOSPHATES
NUCLEAR MAGNETIC RESONANCE
ALUMINIUM 27
EXPERIMENTAL DATA
MOLECULAR SIEVES
MOLECULAR STRUCTURE
SORPTIVE PROPERTIES
ADSORBENTS
ALUMINIUM COMPOUNDS
ALUMINIUM ISOTOPES
DATA
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RESONANCE
STABLE ISOTOPES
SURFACE PROPERTIES
400201* - Chemical & Physicochemical Properties