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
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
A computational study of LiBH4 clusters and enhancement of their hydrogen storage by excess electrons
Chen-Wei Chan,Hsin-Tsung Chen +1 more
TL;DR: In this paper, the electronic structures and energies of neutral and anionic (LiBH4)x clusters have been systematically studied by using density functional theory with the B3LYP/6-311++G(d, p) level.
Journal ArticleDOI
Synthesis and characterization of a 2D covalent organic framework (COF) of hexagonal topology using boronate linkages
TL;DR: A covalent organic framework (COF) has been designed and synthesized successfully by a condensation reaction between hexahydroxytriphenylene hydrate and tetrahydroxydiborane.
Posted ContentDOI
Facile synthesis of novel heterogenous Rh/COF catalyst and its application in tandem selective transfer hydrogenation and mono-methylation of Nitro compounds with Methanol
TL;DR: In this article, two unprecedented Rh-supported COFs heterogeneous catalysts for N-methylamine synthesis were synthesized by Schiff base reaction using melamine as a precursor, and for the first time, they were successfully applied to the effective and high selective tandem reaction of transfer hydrogenation and mono-methylation of nitroaromatic hydrocarbons with methanol as C1 and hydrogenation source, with water as the only byproduct.
Journal ArticleDOI
Moderate and Universal Synthesis of Undoped Covalent Organic Framework Aerogels for Enhanced Iodine Uptake
Xiaofeng Li,Zhimin Jia,Jie Gang Zhang,Yingdi Zou,Bo Jiang,Yingdan Zhang,Kewen Shu,Ning Liu,Yang Li,Lijian Ma +9 more
TL;DR: In this article , a moderate and moderate synthetic strategy for undoped COF aerogels through the catalysis of scandium trifluoromethanesulfonate was presented.
Journal ArticleDOI
Novel polymer-supported phosphine palladium catalyst: one-pot synthesis from and application in Suzuki–Miyaura coupling reaction
TL;DR: In this paper, a "one-pot" strategy was developed for the synthesis of polymer-supported phosphine-Pd catalyst using Suzuki-Miyaura coupling reaction, which exhibited excellent catalytic activity and recycling performance under the mild conditions and water-ethanol mixed media.
References
More filters
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.
Journal ArticleDOI
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.