Characterization of acid sites in zeolitic and other inorganic systems using solid-state 31P NMR of the probe molecule trimethylphosphine oxide

Article Abstract:

The utilization of trimethylphosphine oxide (TMPO) and the solid state 31P nuclear magnetic resonance (NMR) in the acidity studies of zeolites and aluminas were evaluated. The determination of acidic forms exhibited by high-surface materials is significant in catalytic reactions. It was revealed that the use of the solid state 31P NMR of the probe molecule TMPO was effective in identifying the forms and amounts of acid sites on the zeolitic and amorphous materials.

Usage, Nuclear magnetic resonance, Oxides, Amorphous substances, Amorphous materials, Aluminum oxide, Acidification

---

Propene adsorption sites in zeolite ITQ-12: A combined synchrotron X-ray and neutron diffraction study

Article Abstract:

The adsorption site of propene in the small-pore, pure silica zeolite is characterized via Rietveld refinement of the crystal structure of propene-loaded ITQ-12 on the basis of synchrotron X-ray and neutron diffraction data taken at 298 K. At this site, the adsorbed propene molecule lies on a plane close and approximately parallel to the equatorial plane of the cage and is aligned with its methylene group pointing towards the pore's eight-ring window.

Science & research, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Zeolites, Adsorption, Propane, Chemical properties

---

Crystal structure of dehydrated CsZSM-5 (5.8Al): evidence for nonrandom aluminum distribution

Article Abstract:

The first of a series of diffraction studies designed to produce information on the distribution of Al in the ZSM-5 structure is presented. It is concluded that Cs+ ion positioning provides information on aluminum atom distribution.

Isotopes, Aluminum, Aluminum (Metal)

Similar abstracts:

• Abstracts: Characterization of the Cu(super +1) sites in high-silica zeolites interacting with the CO molecule: combined computational and experimental study
• Abstracts: Salt catalysts containing basic anions and acidic cations for the sol-gel process of titanium alkoxide: controlling the kinetics and dimensionality of the resultant titanium oxide
• Abstracts: In situ observation of the surface process involved in dissolution from the (010) surface of potassium ferrocyanide trihydrate in aqueous solution using an integrated electrochemical-atomic force microscope
• Abstracts: NOx reduction from diesel emissions over a nontransition metal zeolite catalyst: a mechanistic study using FTIR spectroscopy
• Abstracts: Dye sensitization of nanocrystalline titanium dioxide with osmium and ruthenium polypyridyl complexes. High quantum yield sensitization of nancrystalline titanium dioxide photoelectrodes with cis-dicyanobis(4,4'-dicarboxy-2,2'-bipyridine)osmium(II) or tris (4,4'-dicarboxy-2,2'-bipyridine)osmium(II) complexes

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.