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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The HOF structures of nitrotetraphenylethene derivatives provide new insights into the nature of AIE and a way to design mechanoluminescent materials
Tao Yu,Depei Ou,Zhiyong Yang,Qiuyi Huang,Zhu Mao,Junru Chen,Yi Zhang,Siwei Liu,Jiarui Xu,Martin R. Bryce,Zhenguo Chi +10 more
TL;DR: In this article, the effect of intramolecular rotations on aggregation-induced emission (AIE) was investigated in two hydrogen-bonded organic frameworks (HOFs) constructed from tris(4-nitrophenyl)phenylethene (TPE) building blocks.
Journal ArticleDOI
A novel 3D covalent organic framework membrane grown on a porous α-Al2O3 substrate under solvothermal conditions
Hui Lu,Chang Wang,Juanjuan Chen,Juanjuan Chen,Rile Ge,Wenguang Leng,Bin Dong,Jun Huang,Yanan Gao +8 more
TL;DR: This is the first reported 3D COF functional membrane fabricated successfully on a common porous α-Al2O3 ceramic support, and the gas permeation results indicate that the gas transport behavior is mainly governed by the predicted Knudsen diffusion process.
Journal ArticleDOI
New element organic frameworks viaSuzuki coupling with high adsorption capacity for hydrophobic molecules
TL;DR: In this paper, the Pd catalyzed Suzuki coupling reaction was used to synthesize highly microporous element organic linkers for the adsorption of non-polar substances.
Journal ArticleDOI
Room-temperature fully recyclable carbon fibre reinforced phenolic composites through dynamic covalent boronic ester bonds
TL;DR: In this article, the authors used phenylboronic acid (PBA) to crosslink traditional novolac resin (NR), namely PBNR, to create reversible thermosets using dynamic boronic ester bonds as cross-links.
Journal ArticleDOI
Structure elucidation of polyheptazine imide by electron diffraction--a templated 2D carbon nitride network.
TL;DR: Structure elucidation of a condensed carbon(IV) nitride with a stoichiometry close to C3N4 by electron diffraction reveals a two-dimensional planar heptazine-based network containing isolated melamine molecules in the trigonal voids.
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.