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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Triazine-based covalent organic polymers: design, synthesis and applications in heterogeneous catalysis
TL;DR: Triazine-based covalent organic polymers (COPs) constructed from triazine or nitrile containing precursors via Covalent bonding are becoming an important sub-class of porous organic framework materials for a range of applications as mentioned in this paper.
Journal ArticleDOI
Conjugated Covalent Organic Frameworks via Michael Addition-Elimination.
TL;DR: A new dynamic polymerization based on Michael addition-elimination reaction of structurally diverse β-ketoenols with amines is reported, and it is used to prepare novel two-dimensional (2D) π-conjugated COFs, as crystalline powders and exfoliated micron-size sheets.
Journal ArticleDOI
Lattice Expansion of Highly Oriented 2D Phthalocyanine Covalent Organic Framework Films
Eric L. Spitler,John Colson,Fernando J. Uribe-Romo,Arthur R. Woll,Marissa Giovino,Abraham Saldivar,William R. Dichtel +6 more
TL;DR: Four phthalocyanine COFs with increased pore size well into the mesoporous regime are described, ideally suited for vertical charge transport and as precursors of ordered heterojunctions.
Journal ArticleDOI
Low concentration CO2 capture using physical adsorbents: Are metal–organic frameworks becoming the new benchmark materials?
TL;DR: In this paper, the authors performed a systematic analysis regarding the key technical parameters that are required for the best CO2 capture performance using physical adsorbents, such as activated carbon, zeolites, and metal-organic frameworks (MOFs).
Journal ArticleDOI
Covalent Organic Frameworks Formed with Two Types of Covalent Bonds Based on Orthogonal Reactions
Yong-Fei Zeng,Yong-Fei Zeng,Ruyi Zou,Ruyi Zou,Zhong Luo,Huacheng Zhang,Xin Yao,Xing Ma,Ruqiang Zou,Yanli Zhao,Yanli Zhao +10 more
TL;DR: A new orthogonal reaction strategy to construct COFs by reversible formations of two types of covalent bonds is reported, applicable to construct not only binary COFs but also more complicated systems in which employing regular synthetic methods did not work.
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.