Journal ArticleDOI
Microporous titanosilicate ETS-10: A structural survey
Michael W. Anderson,Osamu Terasaki,Tetsu Ohsuna,P. J. O. Malley,Andreas Philippou,S. P. Mackay,Artur Ferreira,João Rocha,Sven Lidin +8 more
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TLDR
The structure of a microporous titanosilicate, ETS-10, has been solved using a combination of electron microscopy, X-ray and electron diffraction, solid-state NMR and distance-least squares analysis as discussed by the authors.Abstract:
The structure of a microporous titanosilicate, ETS-10, has been solved using a combination of electron microscopy, X-ray and electron diffraction, solid-state NMR and distance-least squares analysis. We describe in detail how these tools have been applied to the structural solution. ETS-10 is a highly disordered, yet crystalline, wide-pore microporous framework material containing octahedrally coordinated titanium and tetrahedrally coordinated silicon. The disordered material can be described with respect to two ordered polymorphs: polymorph A, space group P41 or P43 with a = b = 14·8 A and α = β = γ = 90° polymorph B, space group C2/c with a = b = 21·00 A, c= 14·51 A and α = γ = 90°, β= 111·12°. Both polymorphs have'a three-dimensional 12-ring pore system and polymorph A has a spiral channel.read more
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Heterogeneous catalysts for biodiesel production
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A titanosilicate molecular sieve with adjustable pores for size-selective adsorption of molecules
Steven M. Kuznicki,Valerie A. Bell,Sankar Nair,Hugh W. Hillhouse,Richard M. Jacubinas,Carola Braunbarth,Brian H. Toby,Michael Tsapatsis +7 more
TL;DR: The framework of the titanium silicate ETS-4, the first member of this class of materials, can be systematically contracted through dehydration at elevated temperatures to ‘tune’ the effective size of the pores giving access to the interior of the crystal, which can be used to tailor the adsorption properties of the materials to give size-selective adsorbents suitable for commercially important separations of gas mixtures of molecules with similar size.
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Probing the surfaces of heterogeneous catalysts by in situ IR spectroscopy
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A mouse knock-in model exposes sequential proteolytic pathways that regulate p27Kip1 in G1 and S phase.
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Journal ArticleDOI
Microporous Titanosilicates and other Novel Mixed Octahedral‐Tetrahedral Framework Oxides
João Rocha,Michael W. Anderson +1 more
TL;DR: In this article, a new class of stable microporous materials that involves novel mixed octhaedral-tetrahedral framework oxides is described, which not only have potential novel applications in the fields normally associated with zeolites but also possible applications in nonlinear optics, batteries, magnetic materials and sensors.
References
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Structural Characterization of Zeolite Beta
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Yan-Fei Shen,Richard P. Zerger,Roberto N. DeGuzman,Steven L. Suib,L. Mccurdy,Donald I. Potter,C. L. O'Young +6 more
TL;DR: A thermally stable 3 x 3 octahedral molecular sieve corresponding to natural todorokite (OMS-1) has been synthesized by autoclaving layer-structure manganese oxides, which are prepared by reactions of MnO4- and Mn2+ under markedly alkaline conditions.
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A general recursion method for calculating diffracted intensities from crystals containing planar faults
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Journal ArticleDOI
Structure of the microporous titanosilicate ETS-10
Michael W. Anderson,Osamu Terasaki,Tetsu Ohsuna,Andreas Philippou,S. P. Mackay,Artur Ferreira,João Rocha,Sven Lidin +7 more
TL;DR: In this article, the structure of ETS-10 was solved using a combination of high-resolution electron microscopy, electron and powder X-ray diffraction, solid-state NMR, molecular modelling and chemical analysis.
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