Guest-host interactions in sodium zeolite Y: Structural and dynamical [sup 23]Na double-rotation NMR study of H[sub 2]O, PMe[sub 3], Mo(CO)[sub 6], and Mo(CO)[sub 4](PMe[sub 3])[sub 2] adsorption in Na[sub 56]Y

Journal Article · Wed Jan 27 04:00:00 EST 1993 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00055a028· OSTI ID:6538466

Jelinek, R ^[1]; Oezkar, S; Malek, A; Ozin, G A ^[2]; Pastore, H O ^[3]

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1. Lawrence Berkeley Lab., CA (United States) Univ. of California, Berkeley (United States)
2. Univ. of Toronto, Ontario (Canada)
3. Univ. of Toronto, Ontario (Canada) Universidade Estadual de Campinas, Sao Paulo (Brazil)

[sup 23]Na double-rotation NMR (DOR) provides site-specific structural and dynamical information on guest-host interactions within sodium zeolite Y pores. Quantitative adsorption of H[sub 2]O, PMe[sub 3], and Mo(CO)[sub 6] guests affects both the positions and line shapes of the [sup 23]Na resonances from specific extraframework Na[sup +] sites. The evolution of the [sup 23]Na DOR spectra with the progressive introduction of guest molecules allows one to probe direct solvation' effects involving the Na[sup +] cations in the larger supercages, as well as indirect effects on the Na[sup +] cations in adjacent smaller sodalite cavities. [sup 23]Na DOR experiments conducted at two magnetic field strengths confirm that PMe[sub 3] coadsorption in 8[l brace]Mo(CO)[sub 6][r brace],16[l brace]PMe[sub 3][r brace]-Na[sub 56]Y, and PMe[sub 3] ligand-substitution in 8[l brace]cis-Mo(CO)[sub 4](PMe[sub 3])[sub 2][r brace]-Na[sub 56]Y give rise to progressive deshielding and enhanced quadrupolar interactions of the anchoring Na[sup +] cations in the [alpha]-cages, relative to those of the starting material, 8[l brace]Mo(CO)[sub 6][r brace]-Na[sub 56]Y. Spin-lattice relaxation measurements indicate that adsorption of PMe[sub 3] facilitates an increased motion of the Na[sup +] cations and/or guest species inside the [alpha]-cages. 22 refs., 6 figs., 1 tab.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6538466
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 115:2; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ALKALI METAL COMPOUNDS
CARBONYLS
CATIONS
CAVITIES
CHARGED PARTICLES
DYNAMICS
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
INTERACTIONS
ION EXCHANGE MATERIALS
IONS
MAGNETIC RESONANCE
MATERIALS
MECHANICS
MINERALS
MOLECULAR STRUCTURE
MOLYBDENUM COMPOUNDS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHINES
PHOSPHORUS COMPOUNDS
REFRACTORY METAL COMPOUNDS
RELAXATION
RESONANCE
SILICATE MINERALS
SODIUM COMPOUNDS
SORPTION
SPIN-LATTICE RELAXATION
TRANSITION ELEMENT COMPOUNDS
WATER
ZEOLITES