An Interpenetrated Pillar-Layered Metal-Organic Framework with Novel Clusters: Reversible Structural Transformation and Selective Gate-Opening Adsorption

Abstract

A new metal–organic framework (MOF), [Co3(tzba)2(bpy)3(F)2]·DMF·C2H5OH·2H2O (1), has been constructed by solvothermal reaction of Co­(NO3)2 with 4-(1H-Tetrazol-5-yl) benzoic acid (H2tzba) and 4,4′-bipyridine (bpy) mixed ligands. 1 shows an interpenetrated three-dimensional (3D) pillar-layered framework with the novel trinuclear [Co3(CN4)2(F2)] clusters. The π···π interactions existing among three bpy give rise to an uncommon tripillar in the framework. The framework reveals a reversible dynamic flexibility related to the solvent molecules. Meanwhile, the adsorption of CO2 exhibits an interesting gate opening–closing phenomenon which features the S-shaped isotherms with dramatic hysteretic desorption. The selective adsorption of CO2 over CH4 as well as the adsorption mechanism for CO2 were also discussed deeply.

Efficient separation of 1,3‐butadiene fromC4hydrocarbons by flexible metal–organic framework with gate‐opening effect

“…In recent years, MOFs have been widely applied to various separation applications, including CO 2 capture, 17 propane–propylene separation, 18,19 hydrogen storage, 20 and so on 21–25 . From the point of view of the adsorption mechanism, the efficient separation of gas mixtures by MOFs adsorbents usually depends on the thermodynamic separation based on interaction force, 26,27 kinetic separation determined by adsorption rate, 28–30 molecular sieving separation, 31,32 and gate‐opening flexible separation 33,34 . Owing to the similarities of molecular sizes, shapes, and properties between C 4 H 6 and other C 4 hydrocarbons, 35 the potential separation of C 4 H 6 from other C 4 hydrocarbons by MOFs adsorbents is still a challenge.…”

Efficient separation of 1,3-butadiene from C4 hydrocarbons by flexible metal-organic framework with gate-opening effect

“…[21][22][23][24][25] From the point of view of the adsorption mechanism, the efficient separation of gas mixtures by MOFs adsorbents usually depends on the thermodynamic separation based on interaction force, 26,27 kinetic separation determined by adsorption rate, [28][29][30] molecular sieving separation 31,32 and gateopening flexible separation. 33,34 Owing to the similarities of molecular sizes, shapes and properties between C 4 H 6 and other C 4 hydrocarbons, 35 the potential separation of C 4 H 6 from other C 4 hydrocarbons by MOFs adsorbents is still a challenge. The information about physical and chemical properties of C 4 hydrocarbons are illustrated in Table S1 .…”

A dual functional 1D Cd‐based coordination polymer for the highly luminescent sensitive detection of Fe3+ and picric acid

“…Coordination polymers (CPs) and metal–organic frameworks (MOFs) are two classes of inorganic–organic hybrid crystalline materials constructed by metal ions or metal clusters with organic ligands. [ 1,2 ] In recent years, CPs and MOFs have been applied in a versatile way in gas adsorption and separation, [ 3,4 ] catalysis, [ 5,6 ] magnetics, [ 7,8 ] bioimaging [ 9 ] and drug delivery. [ 10 ] Now, on account of their outstanding modifiability and excellent optical properties, great progress has been made in sensing nitro compounds, [ 11,12 ] metal cations, [ 13 ] small gas molecules, [ 14,15 ] pH [ 16 ] and temperature.…”