A Scalable Pore-space-partitioned Metal-organic Framework Powered by Polycatenation Strategy for Efficient Acetylene Purification.

Efficient separation of acetylene (CH) from carbon dioxide (CO) and ethylene (CH) is a significant challenge in the petrochemical industry due to their similar physicochemical properties. Pore space partition (PSP) has shown promise in enhancing gas adsorption capacity and selectivity by reducing pore size and increasing the density of guest binding sites. Herein, we firstly employ the 2D→3D polycatenation strategy to construct a PSP metal-organic framework (MOF) Ni-dcpp-bpy, incorporating functional N/O sites to enhance CH purification.

Three in one: engineering MOF channels coordinated water arrays for regulated separation of alkanes and alkenes.

Purifying alkenes (mainly ethylene and propylene) by removing their corresponding alkanes is crucial yet challenging in the chemical industry. Selective physisorption shows promise for effective separation but demands precise pore dimensions and/or pore chemistry of adsorbents. We report an yttrium-based metal-organic framework, Y(TCHB)(OH)·2HO (HIAM-317, TCHB = 3,3',5,5'-tetrakis(4-carboxyphenyl)-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl), that can separate ethylene/ethane and propylene/propane mechanisms regulated by coordinated water arrays.

A Portable Electrochemical Biosensor Based on an Amino-Modified Ionic Metal-Organic Framework for the One-Site Detection of Multiple Organophosphorus Pesticides.

Constructing stable, portable sensors and revealing their mechanisms is challenging. Ion metal-organic frameworks (IMOFs) are poised to serve as highly effective electrochemical sensors for detecting organophosphorus pesticides (OPs), leveraging their unique charge properties. In this work, an amino-modified IMOF was constructed and combined with near-field communication (NFC) technology to develop a portable, touchless, and battery-free electrochemical biosensor .

Different FeS Concentrations for Encapsulating ZIF-67 Nanomaterials toward the Enhanced Oxidation Evolution Reaction.

Due to the slow kinetic nature of the oxygen evolution reaction (OER), the development of electrocatalysts with high efficiency, stability, and economy for oxygen production using metal-organic framework (MOF) materials is still a challenging research topic. In this work, we chose the different concentrations of FeS adsorption to encapsulate metal cobalt-based ZIF-67 MOF for preparing a series of electrocatalysts (ZIFFeS, = 0.2, 0.

Transition-Metal Porphyrin-Based MOFs In Situ-Derived Hybrid Catalysts for Electrocatalytic CO Reduction.

Excellent electrocatalytic CO reduction reaction activity has been demonstrated by transition metals and nitrogen-codoped carbon (M-N-C) catalysts, especially for transition-metal porphyrin (MTPP)-based catalysts. In this work, we propose to use one-step low-temperature pyrolysis of the isostructural MTPP-based metal-organic frameworks (MOFs) and electrochemical in situ reduction strategies to obtain a series of hybrid catalysts of Co nanoparticles (Co NPs) and MTPP, named Co NPs/MTPP (M = Fe, Co, and Ni). The in situ introduction of Co NPs can efficiently enhance the electrocatalytic ability of MTPP (M = Fe, Co, and Ni) to convert CO to CO, particularly for FeTPP.

Pure separation of acetylene based on a sulfonic acid and amino group functionalized Zn-MOF.

The dual-ligand strategy was employed to synthesize a new microporous material, [Zn(SNDC)(AmTAZ)(HO)]·HO·CHCN (), incorporating sulfonic acid and amino groups for enhancing gas adsorption and separation. The activated (named ) exhibited selective adsorption of acetylene over carbon dioxide and methane. Hence, the dual-ligand strategy optimized the pore environment and provided an effective approach for pure separation of gases.

Designing Different Heterometallic Organic Frameworks by Heteroatom and Second Metal Doping Strategies for the Electrocatalytic Oxygen Evolution Reaction.

Metal-organic frameworks (MOFs) are considered one of the most significant electrocatalysts for the sluggish oxygen evolution reaction (OER). Hence, a series of novel N,S-codoped Ni-based heterometallic organic framework (HMOF) (, M = Co, Zn, and Mn; bptz = 2,5-bis((3-pyridyl)methylthio)thiadiazole) precatalysts are constructed by the heteroatom and second metal doping strategies. The effective combination of the two strategies promotes electronic conductivity and optimizes the electronic structure of the metal.

Scalable Synthesis of Robust MOF for Challenging Ethylene Purification and Propylene Recovery with Record Productivity.

Ethylene (CH) purification and propylene (CH) recovery are highly relevant in polymer synthesis, yet developing physisorbents for these industrial separation faces the challenges of merging easy scalability, economic feasibility, high moisture stability with great separation efficiency. Herein, we reported a robust and scalable MOF (MAC-4) for simultaneous recovery of CH and CH. Through creating nonpolar pores decorated by accessible N/O sites, MAC-4 displays top-tier uptakes and selectivities for CH and CH over CH at ambient conditions.

Electron density effect of aromatic carboxylic acids in naphthalenediimide-based coordination polymers: from thermal electron transfer and charge transfer to photoinduced electron transfer.

Various naphthalenediimide (NDI) based electron donor-acceptor coordination polymers (D-A CPs) have been constructed and used to explore charge transfer (CT) and electron transfer (ET) behaviors. Up to now, significant progress has been made in the interface contact and electron donor-acceptor ability matching mechanism, while the electronic density effect of the electron donors on the CT and ET behaviors is still not known. Herein, two NDI-based D-A CPs, [Cd(HNDI)(IPA)(HO)] (1) and [Cd(HNDI)(IPA-OH)(HO)] (2), are constructed using an NDI-based ligand and two aromatic carboxylic acid ligands (HNDI = 2,7-bis(3,5-dimethyl) dipyrazol-1,4,5,8-naphthalene tetracarboxydiimide, HIPA = isophthalic acid; and HIPA-OH = 5-hydroxyisophthalic acid).

One Co-MOF with F Active Sites for Separation of CH from CO, CH, and CH.

Separating acetylene (CH) from other light hydrocarbons and carbon dioxide (CO) mixtures under mild conditions poses significant challenges due to the remarkably similar properties between CH and those gases. For the goal of CH separation, a F-functionalized organic linker, HF-PyIP = 2-fluorine-5-(4-pyridyl)isophthalic acid, was designed, and the corresponding metal-organic framework (MOF), {[Co(F-PyIP)DMF]·4HO} (), was constructed. The MOF with open channels decorated by the active sites of the F groups revealed the exceptional CH uptake and selectivity over CO, CH, and CH.

Active Sites Decorated Nonpolar Pore-Based MOF for One-step Acquisition of C H and Recovery of C H.

Herein, a 2-fold interpenetrated metal-organic framework (MOF) Zn-BPZ-TATB with accessible N/O active sites in nonpolar pore surfaces was reported for one-step C H purification from C H or C H mixtures as well as recovery of C H from C H /C H /C H mixtures. The MOF exhibits the favorable C H and C H uptakes (>100 cm  g at 298 K under 100 kPa) as well as selective adsorption of C H and C H over C H . The C H - and C H -selective feature were investigated detailedly by experimental tests as well as sorption kinetic studyies.

Separation of CH/CH/CH and CH/CO in a Nitrogen-Rich Copper-Based Microporous Metal-Organic Framework.

The purification of industrially valuable CH and CH from multicomponent mixtures represents a crucial process in the chemical industry. In this study, we present a copper-based metal-organic framework () built on a nitrogen-rich organic linker that is capable of separating CH/CH/CH and CH/CO mixtures, therefore producing highly pure CH and CH, respectively. exhibits favorable adsorption of CH and CH over CH and thus achieves one-step CH purification from CH/CH/CH ternary mixtures, as verified by multicomponent breakthrough measurements.

Cu-MOFs with Rich Open Metal and F Sites for Separation of CH from CO and CH.

Herein, we used the 4-fluoro-[1,1'-biphenyl]-3,4',5-tricarboxylic acid (Hfbptc) ligand to design and construct a new metal-organic framework (MOF), [Cu(fbptc)(HO)]·3NMP (), which possesses rich accessible metal sites and F functional groups in the porous walls and shows high uptake for CH (119.3 cm g) and significant adsorption selectivity for CH over CH (14.4) and CO (3.

Efficient CH-selective separation in a microporous Zn(II)-based metal-organic framework the dual-ligand strategy.

Implementing the dual-ligand strategy, a microporous Zn-based MOF 1 with nitro and amino groups was effectively produced. The activated interconnected pores of 1 exhibited high CH uptake capacity and preferential adsorption behaviour for CH over CO, as identified by the experiments and simulations. This work provides a new approach for designing and synthesizing the MOFs with desired structures and properties by optimizing their pore environment the dual-ligand strategy.

Ameliorating Adsorption Performance for Poisonous Methylene Blue through the Amino Functionalization of Metal-Organic Frameworks.

Amino (-NH)-functionalized metal-organic frameworks (MOFs) are widely applied to improve the properties of materials owing to the rich host-guest chemical properties of amino groups. In this work, the amino-functionalization strategy was thus employed to improve the sorption performance of methylene blue (MB). The introduction of -NH groups in did not reduce the pore size of the framework but rather modulated and optimized the host-guest interactions of MOFs.

Solvato-Controlled Assembly and Structural Transformation of Emissive Poly-NHC-Based Organometallic Cages and Their Applications in Amino Acid Sensing and Fluorescence Imaging.

Stimuli-induced structural transformation of supramolecular cages has drawn increasing attention because of their sensitive feature to external variations as model systems to simulate biological processes. However, combining structural transformation and useful functions has remained a difficult task. This study reports the solvato-controlled self-assembly of two unique topologies with different emission characteristics, a water-soluble Ag L cage (A) and an Ag L cage (B), produced from the same sulfonate-pendant tetraphenylethene (TPE) bridged tetrakis-(1,2,4-triazolium) ligand.

Dative B←N bonds based crystalline organic framework with permanent porosity for acetylene storage and separation.

The utilization of dative B←N bonds for the creation of crystalline organic framework (BNOF) has increasingly received intensive interest; however, the shortage of permanent porosity is an obstacle that must be overcome to guarantee their application as porous materials. Here, we report the first microporous crystalline framework, BNOF-1, that is assembled through sole monomers, which can be scalably synthesized by the cheap 4-pyridine boronic acid. The 2D networks of BNOF-1 were stacked in parallel to generate a highly porous supramolecular open framework, which possessed not only the highest BET surface area of 1345 m g amongst all of the BNOFs but also features a record-high uptake of CH and CO in covalent organic framework (COF) materials to date.

Paddle-Wheel-Shaped Porous Cu(II)-Organic Framework with Two Different Channels as an Absorbent for Methylene Blue.

The destruction of the ecological environment caused by human activity and modern industrial development is so severe that the water environment has become seriously polluted. Therefore, the exploration of high-efficiency absorbents has become one of the hot topics to solve this issue. Herein, a porous metal-organic framework [Cu(L)]·2.

Extraordinary Separation of Acetylene-Containing Mixtures in a Honeycomb Calcium-Based MOF with Multiple Active Sites.

Acetylene (CH) separation from multicomponent mixtures is vitally important but industrially challenging for the collection of high-purity CH. To address this requirement, the reaction between the alkaline-earth Ca ions with a dicarboxylate-diazolate linker, 4,6-di(1-tetrazol-5-yl)isophthalic acid (Hdtzip), gave rise to a new metal-organic framework (MOF) material [Ca(dtzip)HO]·2HO (). The material presents unique regular tubular channels based on threefolded helical rod-like secondary building units with rich open metal sites and exposed organic hydrogen-bonding N/O acceptors that enhance the interactions with CH molecules, endowing significant selectivity for CH over CH (5.

Rational Synthesis of a Stable Rod MOF for Ultrasensitive Detection of Nitenpyram and Nitrofurazone in Natural Water Systems.

Overuse of nitenpyram and nitrofurazone in agricultural products poses enormous risks to ecosystems, and effective detection and quantification of these residual pollutants are of great concern. Although several strategies have been established for detecting nitenpyram and nitrofurazone in water, searching for a new sensor material with great sensitivity, selectivity, and recyclability remains challenging. Here, we design and synthesize a stable metal-organic framework (MOF) () by employing an organic linker based on the coordination features of benzene-1,4-dicarboxylate and picolinic acid.

Boosting Ethane/Ethylene Separation by MOFs through the Amino-Functionalization of Pores.

Adsorption technology based on ethane-selective materials is a promising alternative to energy-intensive cryogenic distillation for separating ethane (C H ) and ethylene (C H ). We employed a pore engineering strategy to tune the pore environment of a metal-organic framework (MOF) through organic functional groups and boosted the C H /C H separation of the MOF. Introduction of amino (-NH ) groups into Tb-MOF-76 not only decreased pore sizes but also facilitated multiple guest-host interactions in confined pores.

Development of Cationic Benzimidazole-Containing UiO-66 through Step-by-Step Linker Modification to Enhance the Initial Sorption Rate and Sorption Capacities for Heavy Metal Oxo-Anions.

Effective and rapid capture of heavy metal oxo-anions from wastewater is a fascinating research topic, but it remains a great challenge. Herein, benzimidazole and -CH groups were integrated into UiO-66 in succession via a step-by-step linker modification strategy that was performed by presynthesis modification (to give Bim-UiO-66) and subsequently by postsynthetic ionization (to give Bim-UiO-66-Me). The UiO-66s (UiO-66, Bim-UiO-66, and Bim-UiO-66-Me) were applied in the removal of heavy metal oxo-anions from water.