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
Viologen-Based Conjugated Covalent Organic Networks via Zincke Reaction
Gobinda Das,Tina Skorjanc,Seema Sharma,Felipe Gándara,Matteo Lusi,D. S. Shankar Rao,Sridurai Vimala,Subbarao Krishna Prasad,Jésus Raya,Dong Suk Han,Ramesh Jagannathan,John Carl Olsen,Ali Trabolsi +12 more
TL;DR: The use of Zincke reaction is reported for the first time to fabricate, under either solvothermal or microwave conditions, a viologen-linked covalent organic network in the form of hollow particles or nanosheets, which is stable in acidic, neutral, and basic aqueous solutions.
Journal ArticleDOI
Capture and Reversible Storage of Volatile Iodine by Novel Conjugated Microporous Polymers Containing Thiophene Units.
TL;DR: This study might provide a new possibility for the design and synthesis of functional CMPs containing electron-rich building units for effective capture and reversible storage of volatile iodine to address environmental issues.
Journal ArticleDOI
Tuneable near white-emissive two-dimensional covalent organic frameworks.
Xing Li,Qiang Gao,Juefan Wang,Yifeng Chen,Zhihui Chen,Hai-Sen Xu,Wei Tang,Kai Leng,Guo-Hong Ning,Jishan Wu,Qing-Hua Xu,Su Ying Quek,Yixin Lu,Kian Ping Loh +13 more
TL;DR: It is demonstrated that the eclipsed stacking structure of 2D COFs can be used to turn on, and tune, the solid-state photoluminescence from non-emissive building blocks by the restriction of intramolecular bond rotation via intralayer and interlayer hydrogen bonds among highly organized layers in the eclipse-stacked COFs.
Journal ArticleDOI
Carbon- and Nitrogen-Based Organic Frameworks.
Ken Sakaushi,Markus Antonietti +1 more
TL;DR: This Account presents the strategic design of functionality in cost-effective, affordable artificial materials starting from a spectrum of simple synthetic options to end up with carbon- and nitrogen-based porous frameworks and demonstrates how the electronic structure of polymeric frameworks can be tuned and how this can modify property profiles in a very unexpected fashion.
Journal ArticleDOI
Chiral BINOL-Based Covalent Organic Frameworks for Enantioselective Sensing
TL;DR: The ability to place such a useful BINOL chiral auxiliary inside open channels of COFs capable of amplifying chiral discrimination of the analytes represents a major step toward the rational synthesis of porous molecular materials for more chirality 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.
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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.