Results 151 to 160 of about 7,623 (191)

Mesoporous M41S materials in capillary gas chromatography

Chemical Communications, 1997
M-41S materials anchored to glass capillary columns via sol–gel techniques can be advantageously utilised for gas chromatographic separations.
M. Raimondo, G. Perez, M. Sinibaldi, A. De Stefanis, A. A. G. Tomlinson   +4 more
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Catalytic cracking of isopropylbenzene over hybrid HZSM-12/M41S (M41S = MCM-41 or MCM-48) micro-mesoporous materials

Petroleum Science and Technology, 2018
The catalytic cracking of isopropylbenzene was investigaded over hybrid ZSM-12/MCM-41 and HZSM-12/MCM-48 micro-mesoporous materials, in order to verify the effect of the acid site of the accessibil...
Sanny W. M. Machado, Joselaine C. Santana, Anne M. G. Pedrosa, Marcelo J. B. Souza, Ana C. F. Coriolano, Ellen K. L. Morais, Antonio S. Araujo   +6 more
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The modification of M41S materials: addition of metal clusters and nanoparticles

New Journal of Chemistry, 2010
The incorporation of various molecular metal clusters, with well defined stoichiometry, into M41S materials has been investigated. The grafting of simple metal clusters, such as [Ru3(CO)12] and [PPN]2[Fe4(CO)13], and the larger, and in one instance, bimetallic, clusters [(dppe)2Cu][Cu6Fe4(CO)16] and [PPh4][Ru10(μ6-C)(μ-H)(CO)24] has been achieved ...
Nicole S. Hondow, George A. Koutsantonis, Rebecca O. Fuller, Hamzah Fansuri, Martin Saunders, Robert L. Stamps, Dongke Zhang   +6 more
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Chemical modification of high-quality large-pore M41S materials

Journal of Materials Chemistry, 2002
M41S materials with a pore diameter of 80 A and MCM-41 materials with a pore diameter of 30 A were grafted with a variety of trimethoxysilanes and chlorosilanes. The obtained hybrid materials were characterised by thermogravimetric analysis, nitrogen adsorption measurements and multi nuclear MAS NMR.
Benedikt Lindlar, Marco Lüchinger, Adeline Röthlisberger, Mohamed Haouas, Gerhard Pirngruber, Andreas Kogelbauer, Roel Prins   +6 more
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ChemInform Abstract: The Synthesis and Properties of M41S and Related Mesoporous Materials

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. C. VARTULI, W. J. ROTH, J. S. BECK, S. B. MCCULLEN, C. T. KRESGE   +4 more
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Postsynthesis Hydrothermal Restructuring of M41S Mesoporous Molecular Sieves in Water

The Journal of Physical Chemistry B, 1999
A high-quality Si−MCM-41 was prepared with the composition of SiO2, 0.2; TEAOH, 0.25; CTMABr, 35 in H2O using fumed silica as the silica source. The quality of the compounds was assessed using different analytical techniques such as XRD, N2 adsorption−desorption measurement, UV−vis absorption, FTIR, and 29Si MAS NMR.
Laiyuan Chen, Tatsubbro Horiuchi, Toshiaki Mori, Kazuyuki Maeda   +3 more
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Development of a formation mechanism for M41S materials

1994
1. Summary The influence of surfactant/silica molar ratio(Sur/Si) in M41S syntheses was studied in the simple synthesis system consisting of tetraethylorthosilicate(TEOS), water, and the cetyltrimethylammonium(CTMA) cation at 100°C. As the Sur/Si increased from 0.5 to 2, the siliceous products obtained were identified and could be classified into ...
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Adsorption of carbon dioxide and nitrogen on silica lite-1 and M41S type materials

2005
Abstract The ability of silicalite-1 and M41S type materials to adsorb pure CO 2 and N 2 has been experimentally studied by determining the adsorption isotherms at 20°C. The experimental data have been analyzed using the Langmuir and Freundlich adsorption isotherm models.
A. MACARIO, A. KATOVIC, G. GIORDANO, IUCOLANO, FABIO, CAPUTO, DOMENICO   +4 more
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The discovery of ExxonMobil's M41S family of mesoporous molecular sieves

2004
Publisher Summary This chapter discusses the discovery of ExxonMobil's M41S family of mesoporous molecular sieves. The quest for new molecular sieves in the late 1980's led a team of mobil researchers to the discovery of a family of nanostructured mesoporous materials known as “M41S.” Mobil composition of matter (MCM)-41, the hexagonal phase, is ...
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MPEC 2026-M41 : 2026 MT

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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