Engineering Supramolecular Binding Sites in an Ultrastable and Hydrophobic Metal–Organic Framework for C₂H₆/C₂H₄ Separation

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

The separation of ethane (C2H6) from ethylene (C2H4) is critical for obtaining polymer-grade C2H4. Adsorptive with C2H6-selective MOFs offers a viable alternative to energy-intensive cryogenic distillation, enabling the direct production high-purity In this study, we developed an ultrastable ethane-selective metal-organic framework, UiO-67-(CH3)2, which demonstrates enhanced C2H6 adsorption (4.10 mmol g-1 at 1 bar and 298 K), higher C2H6/C2H4 selectivity 1.70, increased ratio 1.53 compared unmodified UiO-67. GCMC simulations demonstrate that forms more C-H···π interactions surrounding benzene rings C-H···C methyl groups C2H4, highlighting synergistic effects supramolecular interactions. Furthermore, hydrophobic pore environment also minimizes water interference, exceptionally low uptake (0.019 g 60% RH), ensuring robust capacity under high humid conditions. introduction not only significantly enhances performance but improves material's hydrophobicity.

Language: Английский

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Microstructural Modulation of Isomorphic Luminescent Coordination Polymers To Achieve Sensing Effect Transformation

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

The sensing effect transformation is first exploited by microstructural modulation. Two AIE functional ligands L-1 and L-2 were developed to construct two isomorphic coordination polymers [Cu(L-1)2(SCN)2]n (1) [Cu(L-2)2(SCN)2]n (2), respectively (L-1 = 4,4'-((9H-fluoren-9-ylidene)-methylene)dipyridine; 5,5'-((9H-fluoren-9-ylidene)-methylene)dipyrimidine). 1 2 exhibit 1-D single-chain architectures have good water, pH, thermal stabilities. show the functional-ligand-originated luminescence reduced emission intensities. stack in a back-to-back manner with distances of 4.61 5.38 Å, resulting distinct MnO4- effects for 2. exhibits "turn-off" (luminescence quenching) sensing. In sharp contrast, shows "turn-on" enhancing) ability ultrahigh sensitivity. Particularly, represents sensor. Their mechanism toward discussed detail.

Language: Английский

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Superhydrophobic Molecular Selector for Efficient Separation of Ethane over Ethylene under Dry and Humid Conditions

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Exploring humidity-resistant, ethane-selective adsorbents for the one-step purification of polymer-grade (>99.95%) ethylene from ethane-ethylene mixtures is great importance, yet remains a significant challenge. To address this challenge, we present novel strategy constructing "superhydrophobic molecular selector" (SMS) based on porous organic cage (POC), which features superhydrophobic outer surface and an inner cavity with multiple functional sites. The resulting SMS-POC-1 demonstrates excellent C2H6 adsorption capacity (97 cm3 g-1 at 298 K) C2H6/C2H4 selectivity (Sads = 2.40 K), offering superior trade-off between ethane among all C2H6-selective adsorbents. Especially, breakthrough experiments demonstrate that efficiently produces C2H4 60% relative humidity (RH), making it highest-selectivity adsorbent reported to date can stably operate in humid environment. combination experimental results theoretical calculations reveals coexistence synergistic C-H···π interactions hydrogen-bonding sites accounts high separation performance under conditions SMS-POC-1. Our work thus not only general guiding design humidity-resistant adsorption-separation materials but also presents promising candidate potential applications hydrocarbon separation.

Language: Английский

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Immobilizing Functional Sites into Isoreticular Zinc-Based MOFs To Tune Pore Environment for Highly Efficient Methanol-to-Olefins (MTO) Product Separation

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2063 - 2070

Published: April 30, 2025

Language: Английский

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Solvent‐regulated Formation of Metal/Metal‐oxo Nodes in Two Indium Metal‐organic Frameworks: Syntheses, Structures, Selective Gas Adsorption and Fluorescence Sensor Properties

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(58)

Published: Aug. 7, 2024

Abstract Two water‐stable indium metal‐organic frameworks, (NH 2 Me ) 3 [In (BTB) 4 ] ⋅ 12DMA 4.5H O (In‐MOF‐1) and 9 6 8 (H O) (DMSO) 27DMSO 21H (In‐MOF‐2) (BTB=4,4′,4′′‐benzene‐1,3,5‐tribenzoate) with 3D interpenetrated structure has been constructed by regulating solvents. Structure analysis revealed that In‐MOF‐1 a three‐dimensional (3D) single metal core, while In‐MOF‐2 features an octahedron cage three kinds of clusters to further form structure. The fluorescence investigations showed are potential MOF‐based fluorescent sensors detect acetone Fe 3+ ions in EtOH or water high sensitivity, excellent selectivity, recyclability low limit detection. Moreover, the mechanisms I n‐MOF‐1 toward were explained. In addition, higher thermal framework stability than . activated presents BET surface area 998.82 m g −1 pore size distribution 16 Å. At same time, exhibits selective CO adsorption for /CH /N , respectively. Furthermore, sites isotherms predicted using grand canonical Monte Carlo (GCMC) simulations, energy lowest‐energy configuration was calculated molecular dynamics (MD) simulations.

Language: Английский

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One-step purification of ethylene from ethane/ethylene mixtures by a stable vanadium-based metal-organic framework

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131049 - 131049

Published: Dec. 1, 2024

Language: Английский

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New Co-MOF adsorption material with pharynx-shaped channel and large cavity for record ethylene and propylene purification

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Language: Английский

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