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.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
February 2025
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.
View Article and Find Full Text PDFA 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.
View Article and Find Full Text PDFFacile 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.
View Article and Find Full Text PDFNuclear 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.
View Article and Find Full Text PDFACS Appl Mater Interfaces
November 2022
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.
View Article and Find Full Text PDFPorous 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.
View Article and Find Full Text PDFBecause 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.
View Article and Find Full Text PDFThe 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.
View Article and Find Full Text PDFAdsorption-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.
View Article and Find Full Text PDFDespite 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.
View Article and Find Full Text PDFFluorescent 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.
View Article and Find Full Text PDFThe 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.
View Article and Find Full Text PDFFor 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.
View Article and Find Full Text PDFChem Commun (Camb)
August 2019
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.
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