Journal ArticleDOI
Porous, Crystalline, Covalent Organic Frameworks
Adrien P. Côté,Annabelle I. Benin,Nathan W. Ockwig,Michael O'Keeffe,Adam J. Matzger,Omar M. Yaghi +5 more
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TLDR
Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid and hexahydroxytriphenylene to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms.Abstract:
Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid {C6H4[B(OH)2]2} and hexahydroxytriphenylene [C18H6(OH)6]. Powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6.(C9H12)1 (COF-1) and C9H4BO2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P6(3)/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms. COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500 degrees to 600 degrees C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively).read more
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Journal ArticleDOI
Reticular Synthesis of tbo Topology Covalent Organic Frameworks.
TL;DR: The successful use of reticular chemistry is demonstrated as an appropriate strategy for the design and deliberate construction of COFs with a tbo-topology, providing an impetus to examine the potential of t bo-COFs as a new platform for engineering multifunctional materials via expansion and functionalization of building blocks.
Journal ArticleDOI
Crystalline C-C and C═C Bond-Linked Chiral Covalent Organic Frameworks.
TL;DR: In this paper, the reduction of olefin linkages of the as-prepared CCOFs produces two C-C single bond linked frameworks, which retain high crystallinity and porosity as well as high chemical stability in both strong acids and bases.
Journal ArticleDOI
Evolution of Nanocarrier Drug-Delivery Systems and Recent Advancements in Covalent Organic Framework–Drug Systems
TL;DR: This research presents a novel approach to nanomedicine that addresses the challenge of integrating nanofiltration into the delivery mechanism of drugs to overcome the limitations of conventional carriers.
Journal ArticleDOI
The fabrication of 3D hierarchical flower-like δ-MnO2@COF nanocomposites for the efficient and ultra-fast removal of UO22+ ions from aqueous solution
TL;DR: In this paper, interpenetrating 3D flower-like δ-MnO2@TpPa-1 composites were suitably constructed though the integration of δcrystal manganese dioxide nano-flowers with a covalent organic framework via adopting a simple ultrasonication process.
Journal ArticleDOI
Separation of Bromoalkanes Isomers by Nonporous Adaptive Crystals of Leaning Pillar[6]arene
Jia-Rui Wu,Bao Li,Ying-Wei Yang +2 more
TL;DR: Single-crystal structure analysis in conjunction with powder X-ray diffraction patterns and thermoanalysis suggest that the selectivity is endowed by the different host-guest binding modes and different stabilities of EtLP6 crystalloids loaded with 1- and 2-positional isomers.
References
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Book
Adsorption by Powders and Porous Solids: Principles, Methodology and Applications
TL;DR: In this paper, the authors provide an introductory review of the various theoretical and practical aspects of adsorption by powders and porous solids with particular reference to materials of technological importance.
Journal ArticleDOI
An ordered mesoporous organosilica hybrid material with a crystal-like wall structure.
TL;DR: The surfactant-mediated synthesis of an ordered benzene–silica hybrid material has an hexagonal array of mesopores and crystal-like pore walls that exhibit structural periodicity, and it is expected that other organosilicas and organo-metal oxides can be produced in a similar fashion, to yield a range of hierarchically ordered mesoporous solids with molecular-scale pore surface periodicity.
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Unified Approach to Pore Size Characterization of Microporous Carbonaceous Materials from N2, Ar, and CO2 Adsorption Isotherms†
TL;DR: In this paper, a unified approach to pore size characterization of microporous carbonaceous materials such as activated carbon and carbon fibers by nitrogen, argon, and carbon dioxide adsorption at standard temperatures, 77 K for N2 and Ar and 273 K for CO2, was presented.
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Adsorption Study of Surface and Structural Properties of MCM-41 Materials of Different Pore Sizes
TL;DR: In this paper, the pore size of MCM-41 materials was estimated based on geometrical considerations of the ratio of pore volume to pore wall volume for an infinite hexagonal array of cylindrical pores.