Aluminosilicate mesoporous molecular sieve MCM-48
Article Abstract:
The extensive industrial applications of mesoporous silicate molecular sieves spurred scientific investigations into the synthesis and characterization of aluminosilicate MCM-48. The MCM-48 data were compared with the MCM-41 samples. The aluminum specimens were gathered from aluminum chloride hexahydrate and aluminum sulfate, while silica was derived from tetraethyl orthosilicate. X-ray diffraction and diffuse reflectance Fourier transform infrared spectroscopy were performed. Similarities were observed in the nitrogen adsorption/desorption isotherms of both MCM-48 and MCM-41.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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ESCA studies of yttrium aluminum garnets
Article Abstract:
The influence of doping on the host crystal structure of yttrium aluminum garnet (YAG) was investigated using x-ray photoelectron spectroscopy. The consequences of doping were observed indirectly through an analysis of the peaks and variations of the chemical shifts of the main ions forming the YAG crystal. The presence of only one independent oxygen ion was proven, even though the O(1s) spectra of all YAG systems exhibit two readily discerned peaks. This dichotomy is linked to the possible polarization of the oxygen valence electron density between aluminum and yttrium.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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X-ray diffraction and 13C solid-state NMR studies of the dimethytlformamide solvate of tetra(C-undecyl)calix[4]resorcinarene
Article Abstract:
A new study uses NMR and XRD to investigate the crystal and molecular structure of tetra(C-undecyl)calix[4]resorcinaren cocrystallized with dimethylformamide.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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