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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A GO-assisted method for the preparation of ultrathin covalent organic framework membranes for gas separation
Yunpan Ying,Dahuan Liu,Jing Ma,Minman Tong,Weixin Zhang,Hongliang Huang,Qingyuan Yang,Chongli Zhong +7 more
TL;DR: In this paper, a layer-by-layer restacking method was proposed to fabricate ultrathin covalent organic framework membranes for gas separation, where the abundant functional groups in GO can improve the interactions, acting as magnetic sheets, to implement the up-down restacking of two dimensional (2D) Covalent Triazine-based framework-1 (CTF-1) nanosheets on the support.
Journal ArticleDOI
Targeted synthesis of a mesoporous triptycene-derived covalent organic framework
TL;DR: In this article, the synthesis and characterization of a highly porous triptycene-derived covalent organic framework (TDCOF-5) and its performance in small gas storage are reported.
Journal ArticleDOI
Bulk network polymers with dynamic B-O bonds: healable and reprocessable materials
TL;DR: An overview of the chemistry of organoboron species with dynamic B-O bonds amenable to the design of healable/reprocessable thermosets can be found in this paper.
Journal ArticleDOI
An azo-linked porous triptycene network as an absorbent for CO2 and iodine uptake
TL;DR: In this paper, an azo-linked porous organic network (Azo-Trip), in which triptycene is incorporated as a building block, has been prepared via a facile Zn-induced reductive homo-coupling reaction.
Journal ArticleDOI
Template‐Free Tuning of Nanopores in Carbonaceous Polymers through Ionothermal Synthesis
TL;DR: In this paper, a template-free tuning of nanopores in highly porous carbonaceous polymers can be achieved through polymerization of dicyanobiphenyl at high temperatures in a ZnCl2 melt.
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.
Journal ArticleDOI
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.