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
Microtubular Self-Assembly of Covalent Organic Frameworks.
Bappaditya Gole,Vladimir Stepanenko,Sabrina Rager,Matthias Grüne,Dana D. Medina,Thomas Bein,Frank Würthner,Florian Beuerle +7 more
TL;DR: A detailed mechanistic investigation revealed the time‐dependent transformation of initial sheet‐like agglomerates into the tubular microstructures of the obtained COF exhibited spontaneous aggregation into hollow microtubular assemblies with outer and inner tube diameters of around 300 and 90 nm.
Journal ArticleDOI
An assessment of strategies for the development of solid-state adsorbents for vehicular hydrogen storage
Mark D. Allendorf,Zeric Hulvey,Zeric Hulvey,Thomas Gennett,Thomas Gennett,Alauddin Ahmed,Tom Autrey,Jeffrey S. Camp,Eun Seon Cho,Hiroyasu Furukawa,Hiroyasu Furukawa,Maciej Haranczyk,Martin Head-Gordon,Martin Head-Gordon,Sohee Jeong,Abhi Karkamkar,Di Jia Liu,Jeffrey R. Long,Jeffrey R. Long,Katie R. Meihaus,Iffat Nayyar,Roman Nazarov,Donald J. Siegel,Vitalie Stavila,Jeffrey J. Urban,Srimukh Prasad Veccham,Brandon C. Wood +26 more
TL;DR: An overview of the major known and proposed strategies for hydrogen adsorbents is provided, with the aim of guiding ongoing research as well as future new storage concepts.
Journal ArticleDOI
Chiral induction in covalent organic frameworks.
TL;DR: It is demonstrated chiral COFs (CCOFs) can be crystallized from achiral organic precursors by chiral catalytic induction.
Journal ArticleDOI
Hydrogen Storage on Carbon-Based Adsorbents and Storage at Ambient Temperature by Hydrogen Spillover
Lifeng Wang,Ralph T. Yang +1 more
TL;DR: An overview of the progress on hydrogen storage on various carbon-based adsorbents is given in this paper, and a recent, fast-developing research direction, hydrogen storage via spillover on carbons via added catalysts, is reviewed separately.
Journal ArticleDOI
Task-Specific Design of Porous Polymer Heterogeneous Catalysts beyond Homogeneous Counterparts
TL;DR: In this paper, the authors focused mainly on rational preparation of the porous organic polymers under metal-free conditions and their applications in heterogeneous catalysis and observed that many POP-based heterogeneous catalysts demonstrate superior catalytic properties, even better than the homogeneous counterparts.
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.
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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.