A 3D microporous covalent organic framework with exceedingly high C3H8/CH4 and C2 hydrocarbon/CH4 selectivity

Abstract

Here we present a new 3D microporous COF with a uniform pore size (0.64 nm). MCOF-1 exhibits high adsorption selectivity towards C3H8, C2H6 and C2H4 over CH4 owing to the pore size and preferential adsorption.

Opportunities of Covalent Organic Frameworks for Advanced Applications

“…By virtue of the unique planar structure and flexible electron donation property of dehydrobenzoannulene (DBA), McGrier and co-workers demonstrated the synthesis and metalation of a mesoporous 3D COF containing DBA. [20] With the appropriate pore size and high surface area, this material exhibited excellent C 2 H 6 /CH 4 and C 2 H 4 /CH 4 adsorption selectivity, surpassing the representative porous adsorbents and positioning it among the best materials for separating C 2 hydrocarbons from CH 4 . Metalation was readily achieved by treatment of the COF with Ni(COD) 2 toluene solution, yielding Ni-DBA-3D-COF with a retained surface area (4763 m 2 g −1 , Figure 2).…”

A Hydrazone‐Based Covalent Organic Framework as an Efficient and Reusable Photocatalyst for the Cross‐Dehydrogenative Coupling Reaction of N‐Aryltetrahydroisoquinolines

“…Covalent organic frameworks (COFs) as an emerging class of crystalline porousm aterials are covalently assembled from organic buildingb locks. [13] The well-definedC OF materials with periodic architectures and tailoredf unctionalities offer superior potentialf or av ariety of applications, such as gas storagea nd seperation, [14] optoelectricity, [15] energy storage, [16] proton conduction, [17] drug delivery, [18] and catalysis. [19] Up to now,alimited number of reversible reactions were successfully appliedi n the construction of as ignificant amount of two-dimensional (2D) COFs and af ew three-dimensional (3D) COFs.…”

Sophisticated Design of Covalent Organic Frameworks with Controllable Bimetallic Docking for a Cascade Reaction

“…The bimetallically docked COFs showede xcellent catalytic activity in ao ne-pot addition-oxidation cascader eaction. The high surfacea rea, controllable metal-loading content,a nd predesigned active sites make them ideal candidates for their use as heterogeneousc atalysts in aw ide range of chemicalr eactions.Covalent organic frameworks (COFs), [1][2][3][4] an emerging class of crystalline porous polymers that allow the atomically precise integration of building blocks into periodic networks,h ave received much attention in catalysis, [5][6][7][8][9][10][11][12] gass torage/separation, [13][14][15][16][17] sensing, [18,19] and energyc onversion. [20][21][22][23][24][25][26][27] The flexible regulation of the pore parameters (e.g.,s ize, shape, volume, and distribution)a nd easy introductiono ff unctional active sites to the skeleton of the COFs make them promising platforms for the immobilization of catalysts in organic synthesis.…”