Investigation of the coordinated state of aluminum in beta zeolites by X-ray photoelectron spectroscopy
Article Abstract:
The investigation on different beta zeolites with X-ray photoelectron spectroscopy with the aim of examining the different coordination states of aluminum (Al) and the possible presence of tricoordinated Al is presented. It was found that Al(super IV) transforms to Al(super III) and Al(super VI) and change of Al(super III) to Al(super IV) was also found when the sample was ammonium-exchanged conforming the reversibility of Al in beta zeolities.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
Photoinduced electron transfer in ionic liquids: Use of 2,4,6-triphenylthiapyrylium as a photosensitizer probe
Article Abstract:
The photochemistry of 2,4,6-triphenylthiapyrylium (TPT[P.sup.+]) in an ionic liquid (bmim-P[F.sub.6]) and in zeolite Y is investigated and compared. Time-resolved laser spectroscopy has documented the generation of the triplet excited state ([sup.3.T]PT[P.sup.+]) and reduction by dicyclopentadiene (DCP), generating the corresponding radical, TPT[P.sup..], and radical ion, DC[P.sup.+.].
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
ITQ-12: a zeolite having temperature dependent adsorption selectivity and potential for propene separation
Article Abstract:
A unique light hydrocarbon adsorption properties pure silica zeolite ITQ-12 is studied in order to assess its potential for the separation of propene from propene/propane mixtures. ITQ-12 is confirmed as a very attractive adsorbent for the kinetic based separation of propene and propane to yield polymer grade propene streams, together with PSA.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Distribution and structure of N atoms in multiwalled carbon nanotubes using variable-energy X-ray photoelectron spectroscopy
- Abstracts: On the Determination of the Location of Metal Clusters Supported on Molecular Sieves by X-ray Absorption Spectroscopy
- Abstracts: Determination of the solid-state conformations of polyalanine using magic-angle spinning NMR spectroscopy. How does an amide-(sub 15)N chemical shift tensor vary in peptides?
- Abstracts: Quantitative orientation of alpha helical polypeptides by attenuated total reflection infrared spectroscopy. Quantitative determination of the polar order induced under high electric field in amorphous PDR1M azobenzene polymer films
- Abstracts: Formation of zinc inverted opals on indium tin oxide and silicon substrates by electrochemical deposition. Electrochemical characterization of self-assembled alkylsiloxane monolayers on indium-tin oxide (ITO) semiconductor electrodes