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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Proton conduction in crystalline and porous covalent organic frameworks
TL;DR: The results reveal a platform based on porous covalent organic frameworks for proton conduction and achieve proton conductivities that are 2-4 orders of magnitude higher than those of microporous and non-porous polymers.
Journal ArticleDOI
Current understanding and challenges of solar-driven hydrogen generation using polymeric photocatalysts
Yiou Wang,Anastasia Vogel,Michael Sachs,Reiner Sebastian Sprick,Liam Wilbraham,Savio J. A. Moniz,Robert Godin,Robert Godin,Martijn A. Zwijnenburg,James R. Durrant,Andrew I. Cooper,Junwang Tang +11 more
TL;DR: The use of hydrogen as a fuel, when generated from water using semiconductor photocatalysts and driven by sunlight, is a sustainable alternative to fossil fuels as discussed by the authors, however, our understanding of the key properties underlying their photoinitiated redox processes has not kept pace, and this impedes further progress to generate cost-competitive technologies.
Journal ArticleDOI
Recent advances in covalent organic frameworks (COFs) as a smart sensing material.
Xigui Liu,Danlian Huang,Cui Lai,Guangming Zeng,Lei Qin,Han Wang,Huan Yi,Bisheng Li,Shiyu Liu,Mingming Zhang,Rui Deng,Yukui Fu,Ling Li,Wenjing Xue,Sha Chen +14 more
TL;DR: This critical review briefly describes the synthesis routes for COF powders and thin films and the most fascinating and significant applications of COFs in sensing fields including explosive sensing, humidity sensing, pH detection, biosensing, gas sensing, metal ion sensing, and other substance sensing.
Journal ArticleDOI
Porous Polymer Networks: Synthesis, Porosity, and Applications in Gas Storage/Separation
Weigang Lu,Daqiang Yuan,Dan Zhao,Christine I. Schilling,Oliver Plietzsch,Thierry Muller,Stefan Bräse,Johannes Guenther,Janet Blümel,Rajamani Krishna,Zhen Li,Hong-Cai Zhou +11 more
TL;DR: In this paper, three porous polymer networks (PPNs) have been synthesized by the homocoupling of tetrahedral monomers and their porosity was confirmed by N2 sorption isotherms at 77 K. PPN-3 has the highest H2 uptake capacity among these three (4.28 wt %, 77 K).
Journal ArticleDOI
Biomedical Applications of Metal Organic Frameworks
Seda Keskin,Seda Kizilel +1 more
TL;DR: This review outlines the recent progress of using MOFs as a promising platform in biomedical applications due to their high drug loading capacity, biodegradability, and versatile functionality and demonstrates the potential of MOFs for continuous development and implementation inomedical applications.
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.