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
Covalent Organic Frameworks: Chemical Approaches to Designer Structures and Built‐In Functions
Xinyi Chen,Keyu Geng,Ruoyang Liu,Ke Tian Tan,Yifan Gong,Zhongping Li,Shanshan Tao,Qiuhong Jiang,Donglin Jiang +8 more
TL;DR: This review summarizes the fundamentals as well as major progress by focusing on the chemistry to design structures including principle, synthetic strategies and control methods, and proposes major fundamental issues to be addressed in chemistry and future directions from physics, materials and application perspectives.
Journal ArticleDOI
High‐Rate Charge‐Carrier Transport in Porphyrin Covalent Organic Frameworks: Switching from Hole to Electron to Ambipolar Conduction
Xiao Feng,Lili Liu,Yoshihito Honsho,Akinori Saeki,Shu Seki,Stephan Irle,Yuping Dong,Atsushi Nagai,Donglin Jiang,Donglin Jiang,Donglin Jiang +10 more
TL;DR: The central metal in the porphyrin rings changes the conducting nature of the material from hole to electron, and to ambipolar conduction, and drives the high on-off ratio photoconductivity of the framework.
Journal ArticleDOI
Covalent Triazine Frameworks Prepared from 1,3,5-Tricyanobenzene
TL;DR: In this article, a novel covalent triazine framework (CTF-0) was prepared by trimerization of 1,3,5-tricyanobenzene in molten ZnCl2.
Journal ArticleDOI
One-Step Construction of Two Different Kinds of Pores in a 2D Covalent Organic Framework
TL;DR: A novel COF, which bears two different kinds of ordered pores with controllable sizes: one within microporous range and the other in mesoporous range, has been constructed via one-step synthesis.
Journal ArticleDOI
Visualisation and characterisation of voids in crystalline materials
TL;DR: In this article, a simple and more realistic alternative to the conventional approach of mapping void space by rolling a probe sphere of variable radius over a fused-sphere representation of a molecular crystal is presented.
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.