Porous, Crystalline, Covalent Organic Frameworks

  title={Porous, Crystalline, Covalent Organic Frameworks},
  author={Adrien P. C{\^o}t{\'e} and Annabelle I. Benin and Nathan W. Ockwig and Michael O'Keeffe and Adam J. Matzger and Omar M. Yaghi},
  pages={1166 - 1170}
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, P63/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O… 

Chemical Conversion of Linkages in Covalent Organic Frameworks.

This work demonstrates (a) the first chemical conversion of a COF linkage and (b) how the usual "crystallization problem" encountered in COF chemistry can be bypassed to access COFs, such as these amides, that are typically thought to be difficult to obtain by the usual de novo methods.

Designed Synthesis of 3D Covalent Organic Frameworks

Three-dimensional covalent organic frameworks (3D COFs) were synthesized by targeting two nets based on triangular and tetrahedral nodes: ctn and bor and have high thermal stabilities and high surface areas and extremely low densities.

A Porous Metal‐Organic Framework Based on Triazoledicarboxylate Ligands – Synthesis, Structure, and Gas‐Sorption Studies

A new porous metal-organic framework (MOF) {[CuL]·DMF·2H2O}n [1a, H2L = 5-(4H-1,2,4-triazol-4-yl)benzene-1,3-dicarboxylic acid; DMF = N,N-dimethylformamide] with zigzag-shaped, narrow channels was

An Azine-Linked Covalent Organic Framework: Synthesis, Characterization and Efficient Gas Storage.

The new covalent organic framework material combines permanent micropores, high crystallinity, good thermal and chemical stability, and abundant heteroatom activated sites in the skeleton to exhibit remarkable carbon dioxide uptake and methane uptake and high CO2 /N2 selectivity.

A Water-Soluble 3D Covalent Organic Framework That Displays Enhanced Enrichment Effect of Photosensitizers and Catalysts for the Reduction of Protons to H2.

The synthesis of the first highly water-soluble 3D COF (sCOF-101) is reported from irreversible polymerization of a preorganized supramolecular organic framework through cucurbit[8]uril (CB[8])-controlled [2 + 2] photodimerization, which exhibits porosity periodicity.

2D Covalent Organic Frameworks with Alternating Triangular and Hexagonal Pores

C organic frameworks (COFs) are an incipient class of porous crystalline materials that have attracted considerable attention for applications related to gas storage, separations, optoelectronics,5−7

The structure of layered covalent-organic frameworks.

It is shown that the stacking of 2D COFs are considerably more stable if their stacking arrangement is either serrated or inclined, and layers are shifted with respect to each other by ~1.4 Å compared with perfect AA stacking.

A porous, crystalline truxene-based covalent organic framework and its application in humidity sensing

Truxene is employed as a building block to successfully synthesize novel covalent organic frameworks (COFs). The condensation reaction between truxene



An ordered mesoporous organosilica hybrid material with a crystal-like wall structure

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.

One-step synthesis and structure of an oligo(spiro-orthocarbonate).

The reaction of pentaerythritol and tetraethylorthocarbonate at 260 degrees C for 12 h yields a white crystalline material that was characterized by 13C CPMAS NMR, CHN analysis, FT-IR, electron and

Nanoporous Materials Science and Engineering

Nanoporous Materials -- An Overview (G Q Lu & X S Zhao) Advances in Mesoporous Materials Templated by Nonionic Block Copolymers (C Yu et al.) Zeolite/Mesoporous Molecular Sieve Composite Materials (D

Designing permeable molecular crystals that react with external agents to give crystalline products.

Topotactic reactions, which convert single crystals of starting compounds directly into single crystals of products, are elegant and potentially useful processes that have fascinated solid-state

Cross-linked poly(orthocarbonate)s as organic solvent sorbents

A simple method for the synthesis of a series of cross-linked poly(orthocarbonate)s (CPOC), based on tetraethyl orthocarbonate, is reported. Structural evidence for CPOCs was obtained from 13C

Unified Approach to Pore Size Characterization of Microporous Carbonaceous Materials from N2, Ar, and CO2 Adsorption Isotherms†

We present 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

The topochemical 1,6-polymerization of a triene.

The first topochemical 1,6-polymerization of a triene has been observed and the crystal environment of this polymerization reaction controlled both the molecular and supramolecular structure of the polymer and allowed its structure to be determined by single-crystal X-ray diffraction.

Adsorption by Powders and Porous Solids: Principles, Methodology and Applications

The declared objective of this book is to provide an introductory review of the various theoretical and practical aspects of adsorption by powders and porous solids with particular reference to

Accurate Method for Calculating Mesopore Size Distributions from Argon Adsorption Data at 87 K Developed Using Model MCM-41 Materials

Argon adsorption isotherms were measured at 87 K for two macroporous silicas and a series of high-quality MCM-41 silicas with approximately cylindrical pores of average diameters from 2 to 6.5 nm.