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 00:00:00 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), Vol. 115:2; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

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