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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Core-shell motif construction: highly graphitic nitrogen-doped porous carbon electrocatalysts using MOF-derived carbon@COF heterostructures as sacrificial templates
Shuaihua Zhang,Shuaihua Zhang,Wei Xia,Wei Xia,Qian Yang,Yusuf Valentino Kaneti,Yusuf Valentino Kaneti,Xingtao Xu,Saad M. Alshehri,Tansir Ahamad,Md. Shahriar A. Hossain,Jongbeom Na,Jing Tang,Yusuke Yamauchi,Yusuke Yamauchi +14 more
TL;DR: In this article, a highly graphitic nitrogen-doped porous carbon electrocatalyst (GC@COF-NC) is fabricated by utilizing metal-organic framework (MOF)-derived GC@ COF core-shell heterostructure as a sacrificial template.
Journal ArticleDOI
Functionalized Porous Aromatic Framework for Efficient Uranium Adsorption from Aqueous Solutions
Baiyan Li,Qi Sun,Yiming Zhang,Carter W. Abney,Carter W. Abney,Briana Aguila,Wenbin Lin,Shengqian Ma +7 more
TL;DR: The local coordination environment of uranium in PAF-1-CH2AO is revealed by X-ray absorption fine structure spectroscopic studies, which suggest the cooperative binding between UO22+ and adjacent amidoxime species.
Journal ArticleDOI
Porous organic molecular materials
TL;DR: In this article, the advantages of porous organic molecular materials over porous networks are discussed and a large number of nanoporous organic molecular material (crystalline or amorphous) were discovered and their porosity was confirmed by gas adsorption.
Journal ArticleDOI
Fully Conjugated Two-Dimensional sp2 -Carbon Covalent Organic Frameworks as Artificial Photosystem I with High Efficiency.
Yingjie Zhao,Hui Liu,Chenyu Wu,Zhaohui Zhang,Qingyan Pan,Fan Hu,Ruiming Wang,Piwu Li,Xiaowen Huang,Zhibo Li +9 more
TL;DR: This novel sp2 -carbon conjugated TP-COF exhibited unprecedented coenzyme regeneration efficiency and can significantly boost the coen enzyme-assisted synthesis of l-glutamate to a record-breaking 97 % yield within 12 minutes.
Journal ArticleDOI
Adsorption Mechanism and Uptake of Methane in Covalent Organic Frameworks: Theory and Experiment
TL;DR: From their simulations, the authors have been able to observe, for the first time, multilayer formation coexisting with a pore filling mechanism, and the best COF in terms of total volume of CH(4) per unit volume COF absorbent is COF-1, which can store 195 v/v at 298 K and 30 bar, exceeding the U.S. Department of Energy target.
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.