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
Designed Synthesis of a 2D Porphyrin-Based sp 2 Carbon-Conjugated Covalent Organic Framework for Heterogeneous Photocatalysis.
TL;DR: Por-sp2 c-COF, a novel two-dimensional porphyrin-based sp2 carbon-conjugated COF, which adopts an eclipsed AA stacking structure with a Brunauer-Emmett-Teller surface area shows a high chemical stability under various conditions and can be used as a metal-free heterogeneous photocatalyst for the visible-light-induced aerobic oxidation of amines to imines.
Journal ArticleDOI
Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration.
Qi Sun,Briana Aguila,Lyndsey D. Earl,Carter W. Abney,Lukasz Wojtas,Praveen K. Thallapally,Shengqian Ma +6 more
TL;DR: It is shown that 2D covalent organic frameworks (COFs) with unique structures possess all the traits to be well suited as a platform for the deployment of highly efficient sorbents such that they exhibit remarkable performance, as demonstrated by uranium capture.
Journal ArticleDOI
Porous organic molecules
TL;DR: This Perspective discusses recent developments with discrete organic molecules that are porous in the solid state and focuses on the possible advantages of organic molecules over inorganic or hybrid systems in terms of molecular solubility, choice of components and functionalities, and structural mobility and responsiveness in non-covalent extended solids.
Journal ArticleDOI
Covalent Organic Framework–Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation
Hongwei Fan,Hongwei Fan,Alexander Mundstock,Armin Feldhoff,Alexander Knebel,Jiahui Gu,Hong Meng,Jürgen Caro +7 more
TL;DR: A new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based COf-LZU1 and azine- based ACOF-1 layers via a temperature-swing solvothermal approach is demonstrated.
Journal ArticleDOI
Modular and predictable assembly of porous organic molecular crystals
James T. A. Jones,Tom Hasell,Xiao-Feng Wu,John Bacsa,Kim E. Jelfs,Marc Schmidtmann,Samantha Y. Chong,Dave J. Adams,Abbie Trewin,Florian Schiffman,Furio Corà,Ben Slater,Alexander Steiner,Graeme M. Day,Andrew I. Cooper +14 more
TL;DR: It is shown that highly porous crystalline solids can be produced by mixing different organic cage modules that self-assemble by means of chiral recognition and can in principle be generalized in a computationally predictable manner based on a lock-and-key assembly between modules.
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.