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
Constructing Universal Ionic Sieves via Alignment of Two-Dimensional Covalent Organic Frameworks (COFs).
Cheng Jiang,Mi Tang,Shaolong Zhu,Jidong Zhang,Yanchao Wu,Yuan Chen,Cong Xia,Chengliang Wang,Wenping Hu +8 more
TL;DR: A novel method for facilely anisotropic ordering of 2D COFs via depositing COFs onto graphene impressively inhibit the shuttle effect and exhibit versatility to both organic sodium-ion batteries and Li-S batteries, leading to high cyclability.
Journal ArticleDOI
Green synthesis of olefin-linked covalent organic frameworks for hydrogen fuel cell applications
Zhifang Wang,Yi Yang,Zhengfeng Zhao,Penghui Zhang,Yushu Zhang,Jinjin Liu,Shengqian Ma,Peng Cheng,Yao Chen,Zhenjie Zhang +9 more
TL;DR: In this article, a green strategy to fabricate a highly crystalline olefin-linked pyrazine-based covalent organic framework (COF) with high robustness and porosity under solvent-free conditions is presented.
Journal ArticleDOI
Oligothiophene-Bridged Conjugated Covalent Organic Frameworks
Niklas Keller,Derya Bessinger,Stephan Reuter,Mona Calik,Laura Ascherl,Fabian C. Hanusch,Florian Auras,Florian Auras,Thomas Bein +8 more
TL;DR: This work has developed a new building block design employing an asymmetric modification on an otherwise symmetric backbone that allows them to construct a series of highly crystalline quaterthiophene-derived COFs with tunable electronic properties.
Journal ArticleDOI
Computer-assisted screening of ordered crystalline nanoporous adsorbents for separation of alkane isomers.
TL;DR: The approach is to carry out molecularsimulations on a pre-screened list of more than 100 nano-porous structures, including ZIF-77, whose synthesis was reported in 2008, by exploiting subtle differences in molecularconfigurations.
Journal ArticleDOI
Molecular Engineering of Covalent Organic Framework Cathodes for Enhanced Zinc-Ion Batteries
Wenxi Wang,Vinayak S. Kale,Zhen Cao,Yougjiu Lei,Sharath Kandambeth,Guodong Zou,Yun-Pei Zhu,Edy Abou-Hamad,Osama Shekhah,Luigi Cavallo,Mohamed Eddaoudi,Husam N. Alshareef +11 more
TL;DR: In this paper, a strategy to enhance the electrochemical performance of COF cathodes in zinc-ion batteries (ZIBs) by introducing the quinone group into 1,4,5,8,9,12-hexaazatriphenylene-based COFs is reported.
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.