Metal-organic Framework with Polar Pore Surface Designed for Purification of Both Natural Gas and Ethylene.

The advancement of high-value CH4 purification technology within the natural gas industry is paramount for industrial processes. Herein, we constructed ZJNU-402, a new porous material characterized by permanent porosity, as an effective adsorbent for separating C3H8/CH4 and C2H6/CH4 mixtures. The findings reveal an outstanding C3H8 adsorption capacity of 68 cm3 g-1 and a moderate C2H6 adsorption rate of 42 cm3 g-1, with a notably lower CH4 adsorption rate of 11 cm3 g-1.

Flexible hydrogen-bonded organic frameworks (HOFs): opportunities and challenges.

Flexible behavior is one of the most fascinating features of hydrogen-bonded organic frameworks (HOFs), which represent an emerging class of porous materials that are self-assembled H-bonding between organic building units. Due to their unique flexibility, HOFs can undergo structural changes or transformations in response to various stimuli (physical or chemical). Taking advantage of this unique structural feature, flexible HOFs show potential in multifunctional applications such as gas storage/separation, molecular recognition, sensing, proton conductivity, biomedicine, While some other flexible porous materials have been extensively studied, the dynamic behavior of HOFs remains relatively less explored.

Fine-Tuned Ultra-Microporous Metal-Organic Framework in Mixed-Matrix Membrane: Pore-Tailoring Optimization for C H /C H Separation.

Effective separation of ethyne from ethyne/ethylene (C H /C H ) mixtures is a challenging and crucial industrial process. Herein, an ultra-microporous metal-organic framework (MOF) platform, Cd(dicarboxylate) (ditriazole), with triangular channels is proposed for high-efficiency separation of C H from C H . The targeted structures are constructed via a mixed-ligand strategy by selecting different-sized ligands, allowing for tunable pore sizes and volumes.

Asymmetric pore windows in MOF membranes for natural gas valorization.

To use natural gas as a feedstock alternative to coal and oil, its main constituent, methane, needs to be isolated with high purity. In particular, nitrogen dilutes the heating value of natural gas and is, therefore, of prime importance for removal. However, the inertness of nitrogen and its similarities to methane in terms of kinetic size, polarizability and boiling point pose particular challenges for the development of energy-efficient nitrogen-removing processes.

Designing Multicomponent Metal-Organic Frameworks with Hierarchical Structure-Mimicking Distribution for High CO Capture Performance.

By utilizing a mixed-ligand strategy, a novel multicomponent Cu-metal-organic framework (MOF) () has been successfully synthesized. has an unusual hierarchical structure-mimicking distribution structure. The triangular 4,4',4″-benzene-1,3,5-triyl-tribenzoate (BTB) ligand and the binuclear Cu cluster form a threefold interpenetration layer, while the linear ligand 1,4-phenylene-4,4'-bis(1,2,4-triazole) (-trph) and tetranuclear Cu cluster form a noninterpenetration pillared-layer structure.

Contiguous layer based metal-organic framework with conjugated π-electron ligand for high iodine capture.

Herein, a novel 3-dimensional (3D) Cu(II) metal-organic framework (MOF), [Cu(μ-O)(-trPh)(HCOO)][NO]·3DMF·3HO (compound 1), which is constructed by directly interlocking regionalized hollow two-dimensional (2D) layers, has been conceived and solvothermally synthesized. Such a distinctive regionalized pore system effectively maintains the uniformity of the pore structure, isolates the counterions and bridging ligands in the partition layer, and endows compound 1 with high porosity. In consequence, compound 1 exhibits excellent adsorption ability of iodine in cyclohexane.

Recent Progress on Microfine Design of Metal-Organic Frameworks: Structure Regulation and Gas Sorption and Separation.

Metal-organic frameworks (MOFs) have emerged as an important and unique class of functional crystalline hybrid porous materials in the past two decades. Due to their modular structures and adjustable pore system, such distinctive materials have exhibited remarkable prospects in key applications pertaining to adsorption such as gas storage, gas and liquid separations, and trace impurity removal. Evidently, gaining a better understanding of the structure-property relationship offers great potential for the enhancement of a given associated MOF property either by structural adjustments via isoreticular chemistry or by the design and construction of new MOF structures via the practice of reticular chemistry.

Quest for Zeolite-like Supramolecular Assemblies: Self-Assembly of Metal-Organic Squares via Directed Hydrogen Bonding.

Our conceived approach based on the directed assembly of functional metal-organic squares (MOSs), 4-membered ring (4MR) building units, permitted the construction of two novel zeolite-like supramolecular assemblies (ZSAs), namely [Co (ImDC) (En) ]⋅9 H O⋅1.5 DMF (ZSA-10) and [Co (ImDC) (En) ]⋅7 H O (ZSA-11) (H ImDC=4,5-imidazoledicarboxylic acid, En=ethylenediamine, DMF=N,N-dimethylformamide). The elected MOSs encompass both trans- and cis-coordinated nodes, offering complementary peripheral functional groups for their directed assembly into zeolite-like topologies via supramolecular hydrogen bonding interactions.

A Stable Mesoporous Zr-Based Metal Organic Framework for Highly Efficient CO Conversion.

With the help of modulator synthesis method, a mesoporous Zr-based metal-organic framework, [ZrO(OH)(HO)(TADIBA)]·24DMF·45HO (DMF = N, N-dimethylformamide, HTADIBA = 4,4'-(2 H-1,2,4-triazole-3,5-diyl) dibenzoic acid), namely, JLU-MOF58, was successfully constructed. JLU-MOF58 having reo topology is constructed by the bent ligands with Lewis basic sites and 8-connected Zr clusters with Lewis and Brønsted acid sites. It not only possesses two types of mesoporous cages: octahedral and cuboctahedral (2.

Supramolecular interactions induced distortion of BTB ligands: breaking convention to reproduce an unusual (3,4,4)-connected MOF topology.

An unusual (3,4,4)-connected MOF topology has been reproduced by a 4,4',4''-benzene-1,3,5-triyl-tribenzoate (BTB) ligand which was previously judged to be not feasible to form this network. The outcome demonstrates that supramolecular interactions play a key role in the formation of this highly distorted network. Moreover, this triple interpenetrated framework exhibits high BET surface area.

Mesoporous Hexanuclear Copper Cluster-Based Metal-Organic Framework with Highly Selective Adsorption of Gas and Organic Dye Molecules.

Despite many advances in the design and assembly of mesoporous metal-organic frameworks (meso-MOFs), it is still a challenge to obtain the desired structure. Here, we utilized an effective cluster cooperative assembly strategy by introducing SO ions as chelating binding sites to construct a novel mesoporous MOF, [Cu(SO)(TBA)(OH)( N,N-dimethylacetamide (DMA))]·12DMA·12CHOH [JLU-MOF51, HTBA = 4-(1 H-tetrazol-5-yl)-benzoic acid]. Remarkably, the cooperative assembly of the infrequent hexanuclear [CuSO(OH)] cluster and the classical paddlewheel [Cu(CO)] via linear hetero-N, O donor ligand results in an open three-dimensional framework, which possesses one-dimensional nanometer tube channels with the diameter of 24 and 28 Å.

Two Finite Binuclear [M(μ-OH)(COO)] (M = Co, Ni) Based Highly Porous Metal-Organic Frameworks with High Performance for Gas Sorption and Separation.

Two highly porous MOFs, [Co(μ-OH)(bpdc)(Htpim)][SiF]·3.5DMA·2.5CHOH (JLU-Liu37, Hbpdc = biphenyl-4,4'-dicarboxylate, Htpim = 2,4,5-tri(4-pyridyl)imidazole) and [Ni(μ-OH)(bpdc)(Htpim)][SiF]·7.