A High-Stability Co-MOF with Open Metal Sites for CH/CO/CH Separation.

One-step purification of CH from ternary mixtures (CH, CO and CH) can significantly reduce the energy consumption of the separation process, but it is extremely challenging. A new Co-MOF (TNU-BTTB-1) with a three-dimensional (3D) framework was synthesized, which displays high thermal stability, retaining its structural integrity at temperatures up to 400 °C. The structure possesses rich accessible open metal sites in the porous walls and shows high uptake for CH (37.

Precisely Tuning Band Gaps of Hexabenzocoronene-Based MOFs Toward Enhanced Photocatalysis.

Precise adjusting the band gaps in metal-organic frameworks (MOFs) is crucial for improving their visible-light absorption capacity during photocatalysis, presenting both a formidable challenge and a charming opportunity. This present study employed a symmetry-reduction strategy to pre-design six novel 4-connected ligands with systematic substituents (-NO, -H, -Bu, -OCH, -OH and -NH) and synthesized the corresponding pillared-layer Zr-MOFs (NKM-668) retaining the hexaphenylbenzene fragment. Subsequently, the NKM-668 MOFs were transformed into large-π-conjugated hexabenzocoronene-based MOFs (pNKM-668) via the Scholl reaction.

A 2-fold interpenetrating 3D pillar-layered MOF for the gas separation and detection of metal ions.

A 2-fold interpenetrating 3D pillar-layered MOF, which was assembled from a mixed-linker and paddle-wheel cluster, was successfully synthesized. It possesses good thermal and water stability as well as high selectivity for CH over CH and CO over N under ambient conditions, which was further proved by breakthrough experiments. Moreover, this porous material exhibits good detection of Cu, [Co(NH)] and Fe in an aqueous solution.

Facile and scale-up syntheses of high-performance enzyme@meso-HOF biocatalysts.

Facile immobilization is essential for the wide application of enzymes in large-scale catalytic processes. However, exploration of suitable enzyme supports poses an unmet challenge, particularly in the context of scale-up biocatalyst fabrication. In this study, we present facile and scale-up syntheses of high-performance enzyme biocatalysts encapsulation of cytochrome c (Cyt-c) as mono-enzyme and glucose oxidase (GOx)-horseradish peroxidase (HRP) as dual-enzyme cascade (GOx&HRP) systems, respectively, into a stable mesoporous hydrogen-bonded organic framework (meso-HOF) matrix.

Scavenging Radionuclide by Shapeable Porous Materials.

Nuclear energy is a competitive and environmentally friendly low-carbon energy source. It is seen as an important avenue for satisfying energy demands, responding to the energy crisis, and mitigating global climate change. However, much attention has been paid to achieving the effective treatment of radionuclide ions produced in nuclear waste.

Rational Pore Design of a Cage-like Metal-Organic Framework for Efficient CH/CO Separation.

Considering the importance of CH in industry, it is of great significance to develop porous materials for efficient CH/CO separation. Besides the high selectivity, the CH adsorption capacity is another vital factor in CH/CO separation. However, the "trade-off" between these two factors is still perplexing.

From a Metal-Organic Square to a Robust and Regenerable Supramolecular Self-assembly for Methane Purification.

Porous supramolecular assemblies constructed by noncovalent interactions are promising for adsorptive purification of methane because of their easy regeneration. However, the poor stability arising from the weak noncovalent interactions has obstructed their practical applications. Here, we report a robust and easily regenerated polyhedron-based cationic framework assembled from a metal-organic square.

A Metal-Organic Framework with Nonpolar Pore Surfaces for the One-Step Acquisition of C H from a C H and C H Mixture.

Because C H plays an essential role in the chemical industry, economical and energy-efficient separation of ethylene (C H ) from ethane (C H ) is extremely important. With the exception of energy-intensive cryogenic distillation, there are few one-step methods to obtain polymer-grade (≥99.95 % pure) C H from C H /C H mixtures.

Stable Fluorinated Hybrid Microporous Material for the Efficient Separation of C-C Alkyne/Alkene Mixtures.

The separation of C-C alkyne/alkene mixtures is important but difficult work thanks to their similar physical and chemical properties. Crystalline porous materials with high alkyne adsorption and prominent separation selectivity of alkyne/alkene mixtures have been extensively investigated because of their energy-saving merits. Herein, we report a fluorinated hybrid microporous material (FJI-W1) that exhibits unexpected water and thermal stability.

Cage-Like Porous Materials with Simultaneous High C H Storage and Excellent C H /CO Separation Performance.

Adsorption-based separation is an important technology for C H purification due to the environmentally friendly and energy-efficient advantage. In addition to the high selectivity of C H /CO , the high uptake of C H also plays an important role in the separation progress. However, the trade-off between adsorption capacity and separation performance is still in a dilemma.

An Unprecedented Pillar-Cage Fluorinated Hybrid Porous Framework with Highly Efficient Acetylene Storage and Separation.

Despite much intense investigation on the C H /CO separation, the trade-off between the adsorption capacity and separation selectivity is still tricky. To overcome the dilemma, we have rationally synthesized an ultra-stable fluorinated hybrid porous material SIFSIX-Cu-TPA with the ith-d topology. Completely differing from the famous pillar-layer fluorinated materials, SIFSIX-Cu-TPA possesses a unique pillar-cage structure, in which the SiF anions cross-link two adjacent metal nodes as pillars to stabilize the three-dimensional framework constructed by icosahedral and tetrahedral cages.

Two Pyrene-Based Metal-Organic Frameworks for Chemiluminescence.

Fluorescent agents play an important role in the peroxyoxalate chemiluminescence system. However, the effect of different frameworks on chemiluminescence (CL) has not been explored. Herein two pyrene-based metal-organic frameworks (MOFs), [PbL]·2DMA·2HO () and [(CaL)·(DMF)]·2.

Precisely Embedding Active Sites into a Mesoporous Zr-Framework through Linker Installation for High-Efficiency Photocatalysis.

The pore engineering of microporous metal-organic frameworks (MOFs) has been extensively investigated in the past two decades, and an expansive library of functional groups has been introduced into various frameworks. However, the reliable procurement of MOFs possessing both a targeted pore size and preferred functionality together is less common. This is especially important since the applicability of many elaborately designed materials is often restricted by the small pore sizes of microporous frameworks.

Building a robust 3D Ca-MOF by a new square CaO SBU for purification of natural gas.

For the first time, a new square Ca4O SBU is introduced into a 3D Ca-MOF, ([MeNH2]2[Ca4O(MTB)2(EtOH)4])·(solvent)n (1), to generate a (4,8)-connected flu-topology structure. Compound 1 exhibits selective adsorption of C3 and C2 hydrocarbons and CO2 over CH4 with especially high IAST selectivities for C3 hydrocarbons over CH4 (at 15/85 and 50/50 ratio) at 298K and 1 bar.

A robust cage-based framework for the highly selective purification of natural gas.

A robust microporous material (FJI-H19), which is constructed from distorted cuboctahedral cages and distorted octahedral cages, has been successfully synthesized. FJI-H19 possesses good thermal and water stability as well as highly selective adsorption of C3 and C4 hydrocarbons over CH4 under ambient conditions. More importantly, the high selectivities for the separation of CH4/C3 or C4 mixtures (85/15) have not only been estimated by ideal adsorbed solution theory (IAST) but also definitely confirmed by breakthrough experiments.