Search

Your search keyword '"Matthew L Smith"' showing total 4 results
Start Over Author "Matthew L Smith" Journal the journal of physical chemistry
4 results on '"Matthew L Smith"'

1. Study of ZSM-5 and ZSM-11 zeolites by xenon-129 NMR: effect of silicon/aluminum ratio

Author

Qi Chen, Cecil Dybowski, Matthew L. Smith, Jacques Fraissard, David R. Corbin, and Marie-Anne Springuel-Huet

Subjects
Chemistry, Chemical shift, Inorganic chemistry, General Engineering, chemistry.chemical_element, Nuclear magnetic resonance spectroscopy, Faujasite, engineering.material, Molecular sieve, Xenon, engineering, Isotopes of xenon, Physical chemistry, Physical and Theoretical Chemistry, ZSM-5, Zeolite
Abstract

The NMR spectroscopy of xenon sorbed in pentasil zeolites of the MFI (ZSM-5) and MEL (ZSM-11) structures is different from that of xenon adsorbed in the faujasite structure. The dependence of the xenon NMR chemical shift and spin-lattice relaxation rate on Si/Al ratio at 298 K points out a discontinuity in the surface properties at around 2 Al/unit cell and then a nonrandom distribution of aluminum atoms in the lattice

Published
1992
Full Text
View/download PDF

2. Effects of temperature on xenon-129 NMR spectroscopy of xenon in zeolite rho

Author

David R. Corbin, Cecil Dybowski, and Matthew L. Smith

Subjects
inorganic chemicals, integumentary system, Chemistry, Enthalpy, General Engineering, chemistry.chemical_element, Nuclear magnetic resonance spectroscopy, Molecular sieve, Catalysis, Xenon, Isotopes of xenon, Physical chemistry, cardiovascular diseases, Physical and Theoretical Chemistry, Selectivity, Zeolite, circulatory and respiratory physiology, Nuclear chemistry
Abstract

Zeolite rho has an unusually flexible framework, which may be an important factor in its catalytic selectivity. We report studies of the NMR spectroscopy of xenon sorbed in this zeolite structure which are sensitive to temperature and loading. The results indicate that the structure is sensitive to both xenon loading and temperature

Published
1993
Full Text
View/download PDF

3. Flexibility of zeolite rho: xenon-129 NMR studies of entrapped xenon in cadmium-rho

Author

Matthew L. Smith, David R. Corbin, Cecil Dybowski, and Lloyd Abrams

Subjects
Adsorption, Xenon, Chemistry, General Engineering, Isotopes of xenon, Noble gas, Physical chemistry, chemistry.chemical_element, Physical and Theoretical Chemistry, Molecular sieve, Selectivity, Zeolite, Resonance (chemistry)
Abstract

Zeolite rho has a flexible framework which may be an important factor in its catalytic selectivity. We identify the NMR signature of 129 Xe trapped within the framework of Cd-rho zeolite. In addition, we identify a low-intensity resonance observed when xenon is adsorbed in H,Cs-rho zeolite as a xenon species on the surface of the crystallite

Published
1993
Full Text
View/download PDF

4. NMR spin-lattice relaxation of xenon adsorbed in Na-Y zeolite

Author

Matthew L. Smith and Cecil Dybowski

Subjects
inorganic chemicals, integumentary system, Ion exchange, Chemistry, General Engineering, Spin–lattice relaxation, chemistry.chemical_element, Noble gas, Molecular sieve, Xenon, Isotopes of xenon, Relaxation (physics), Physical chemistry, cardiovascular diseases, Physical and Theoretical Chemistry, Zeolite, circulatory and respiratory physiology, Nuclear chemistry
Abstract

Relaxation times of xenon adsorbed in Na-Y zeolites have been measured at 298 K as a function of xenon uptake. The uptake-dependent relaxation rate is indicative of exchange among sites with different relaxation times

Published
1991
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results