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Hydrogen-Bonded Water-Aminium Assemblies for Synthesis of Zeotypes with Ordered Heteroatoms.
J Am Chem Soc
October 2022
Center for Ordered Nanoporous Materials Synthesis, Division of Environmental Science and Engineering, POSTECH, Pohang 37673, Korea.
Water plays a central role in the crystallization of a variety of organic, inorganic, biological, and hybrid materials. This is also true for zeolites and zeolite-like materials, an important class of industrial catalysts and adsorbents. Water is always present during their hydrothermal synthesis, either with or without organic species as structure-directing agents.
View Article and Find Full Text PDFSolvent-Free Thermal Synthesis of Extra-Large-Pore Aluminophosphate Zeotype via Self-Assembly of Double-Four-Ring Unit.
Chemistry
May 2022
State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
The use of Ge as framework atom to direct the formation of double-four-ring (d4r) unit is an effective way to prepare zeolite with extra-large pores, which however also brings about serious problems with regard to production cost and structure stability for their practical application. A new solvent-free thermal synthesis strategy is presented here for facile preparation and molecular-level mechanism study of extra-large-pore aluminophosphate zeotype DNL-1 with -CLO structure. For the first time, the formation of intermediate d4r in the induction period was successfully confirmed, and was correlated with the synthesis condition of low water content and quaternary ammonium template with suitable alkyl chain length.
View Article and Find Full Text PDFAmphiphilic Organic-Inorganic Hybrid Zeotype Aluminosilicate like a Nanoporous Crystallized Langmuir-Blodgett Film.
Angew Chem Int Ed Engl
June 2015
Faculty of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu 808-0135 (Japan).
A new organic-inorganic hybrid zeotype compound with amphiphilic one-dimensional nanopore and aluminosilicate composition was developed. The framework structure is composed of double aluminosilicate layers and 12-ring nanopores; a hydrophilic layer pillared by Q(2) silicon atom species and a lipophilic layer pillared by phenylene groups are alternately stacked, and 12-ring nanopores perpendicularly penetrate the layers. The framework topology looks similar to that of an AFI-type zeolite but possesses a quasi-multidimensional pore structure consisting of a 12-ring channel and intersecting small pores equivalent to 8-rings.
View Article and Find Full Text PDFReactive oxygen species mediated DNA damage in human lung alveolar epithelial (A549) cells from exposure to non-cytotoxic MFI-type zeolite nanoparticles.
Toxicol Lett
December 2012
Nanolab, FOCAS Research Institute, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.
Increasing utilization of engineered nanoparticles in the field of electronics and biomedical applications demands an assessment of risk associated with deliberate or accidental exposure. Metal based nanoparticles are potentially most important of all the nanoparticles in terms of health risks. Microporous alumino-silicates and pure silicates named as zeolites and zeo-type materials with variety of structures, chemical compositions, particle sizes and morphologies have a significant number of industrial uses such as in catalysis, sorption and ion-exchange processes.
View Article and Find Full Text PDFZeotype organic-inorganic ionic crystals: facile cation exchange and controllable sorption properties.
Angew Chem Int Ed Engl
December 2010
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
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