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
Solvatochromic covalent organic frameworks
Laura Ascherl,Emrys W. Evans,Matthias Hennemann,Daniele Di Nuzzo,Alexander G. Hufnagel,Michael Beetz,Richard H. Friend,Timothy Clark,Thomas Bein,Florian Auras +9 more
TL;DR: The authors demonstrate that combination of electron-rich and -deficient building blocks leads to COFs which fast and reversibly change of their electronic structure depending on the surrounding atmosphere, which is the first to be reported.
Journal ArticleDOI
Predesigned Metal-Anchored Building Block for In Situ Generation of Pd Nanoparticles in Porous Covalent Organic Framework: Application in Heterogeneous Tandem Catalysis
Mohitosh Bhadra,Himadri Sekhar Sasmal,Himadri Sekhar Sasmal,Arghya Basu,Siba P. Midya,Sharath Kandambeth,Sharath Kandambeth,Pradip Pachfule,Ekambaram Balaraman,Ekambaram Balaraman,Rahul Banerjee,Rahul Banerjee +11 more
TL;DR: This hybrid material is found to be an excellent reusable heterogeneous catalyst for the synthesis of biologically and pharmaceutically important 2-substituted benzofurans from 2-bromophenols and terminal alkynes via a tandem process with the turnover number up to 1101.
Journal ArticleDOI
2020 roadmap on two-dimensional materials for energy storage and conversion
Baolin Xu,Shihan Qi,Mengmeng Jin,Xiaoyi Cai,Linfei Lai,Linfei Lai,Zhouting Sun,Xiaogang Han,Zifeng Lin,Hui Shao,Hui Shao,Peng Peng,Zhonghua Xiang,Johan E. ten Elshof,Rou Tan,Chen Liu,Zhao-Xi Zhang,Xiaochuan Duan,Jianmin Ma,Jianmin Ma +19 more
TL;DR: In this article, a roadmap for two-dimensional materials for energy storage and conversion is presented, which includes graphite, black phosporus, MXenes, covalent organic frameworks (COFs), 2D oxides, 2D chalcogenides, and others.
Journal ArticleDOI
Targeted synthesis of a porous aromatic framework with a high adsorption capacity for organic molecules
TL;DR: Tetrakis(4-bromophenyl)methane (TBPM) as a tetrahedral unit and a diboronic acid as a linker were selected to couple the phenyl rings into a porous aromatic framework, PAF-11 as mentioned in this paper.
Journal ArticleDOI
Imparting Catalytic Activity to a Covalent Organic Framework Material by Nanoparticle Encapsulation
TL;DR: The obtained COF composites with embedded but accessible Au nanoparticles possess large surface areas and highly open mesopores and display recyclable catalytic performance for reduction of 4-nitrophenol, which cannot be catalyzed by the pure COF material, with activities relevant to contents and geometric structures of the incorporated nanoparticles.
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.
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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.