Solid-state oxygen-17 nuclear magnetic resonance spectroscopic studies of zeolites and related systems. 1

Journal Article · Wed Nov 12 04:00:00 EST 1986 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00283a017· OSTI ID:6996856

Timken, H K.C.; Turner, G L; Gilson, J P; Welsh, L B; Oldfield, E

The authors have obtained static, magic-angle, and variable-angle sample-spinning /sup 17/O NMR spectra of /sup 17/O-labeled A, Y, and dealuminated Y zeolites at 67.8 and 48.8 MHz (corresponding to magnetic field strengths of 11.7 and 8.45 T). The results indicate that the ranges of /sup 17/O nuclear quadrupole coupling constants (e/sup 2/aQ/h) of the Si(/sup 17/O)Al and Si(/sup 17/O)Si fragments are 3.1-3.2 and 4.6-5.2 MHz, respectively, in general agreement with those predicted on the basis of the empirical correlation presented previously (Schramm, S.: Oldfield, E. J. Am. Chem. Soc. 1984, 106, 2502). The asymmetry parameters are 0.2 for Si(/sup 17/O(Al and 0.1 for Si(/sup 17/)Si. The isotropic chemical shifts of the Si(/sup 17/O)Al fragments are in the range of 31-45 ppm relative to H/sub 2/O, while those of the Si(/sup 17/)Al fragments are in the range of 44-57 ppm.

• Research Organization: Univ. of Illinois, Urbana-Champaign
• DOE Contract Number: FG22-83PC60779
• OSTI ID: 6996856
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 108:23; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHEMICAL SHIFT
COUPLING CONSTANTS
DATA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
MINERALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
OXYGEN 17
OXYGEN ISOTOPES
RESONANCE
SOLIDS
SPECTRA
STABLE ISOTOPES
ZEOLITES