Metal–Organic Framework with Space-Partition Pores by Fluorinated Anions for Benchmark C₂H₂/CO₂ Separation

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(25), С. 17220 - 17229

Опубликована: Июнь 11, 2024

The efficient separation of C2H2 from C2H2/CO2 or C2H2/CO2/CH4 mixtures is crucial for achieving high-purity (>99%), essential in producing contemporary commodity chemicals. In this report, we present ZNU-12, a metal–organic framework with space-partitioned pores formed by inorganic fluorinated anions, highly and separation. framework, partitioned SiF62– anions into three distinct cages, enables both high capacity (176.5 cm3/g at 298 K 1.0 bar) outstanding selectivity over CO2 (13.4) CH4 (233.5) simultaneously. Notably, achieve record-high productivity (132.7, 105.9, 98.8, 80.0 L/kg 99.5% purity) (v/v = 50/50) 1/1/1, 1/1/2, 1/1/8) through cycle adsorption–desorption breakthrough experiments recovery rates. Theoretical calculations suggest the presence potent "2 + 2" collaborative hydrogen bonds between two hexafluorosilicate (SiF62–) confined cavities.

Язык: Английский

---

Multimodal Engineering of Catalytic Interfaces Confers Multi‐Site Metal‐Organic Framework for Internal Preconcentration and Accelerating Redox Kinetics in Lithium‐Sulfur Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(8)

Опубликована: Янв. 5, 2024

Abstract The development of highly efficient catalysts to address the shuttle effect and sluggish redox kinetics lithium polysulfides (LiPSs) in lithium‐sulfur batteries (LSBs) remains a formidable challenge. In this study, series multi‐site catalytic metal‐organic frameworks (MSC‐MOFs) were elaborated through multimodal molecular engineering regulate both reactant diffusion catalysis processes. MSC‐MOFs crafted with nanocages featuring collaborative specific adsorption/catalytic interfaces formed by exposed mixed‐valence metal sites surrounding adsorption sites. This design facilitates internal preconcentration, coadsorption mechanism, continuous conversion toward concurrently. Leveraging these attributes, LSBs an MSC‐MOF‐Ti interlayer demonstrated 62 % improvement discharge capacity cycling stability. resulted achieving high areal (11.57 mAh cm −2 ) at sulfur loading (9.32 mg under lean electrolyte conditions, along pouch cell exhibiting ultra‐high gravimetric energy density 350.8 Wh kg −1 . Lastly, work introduces universal strategy for new class MOFs, promoting SRR suppressing level. findings shed light on advanced porous materials application high‐energy LSBs.

Язык: Английский

---

Recent advances on metal–organic frameworks for deep purification of olefins

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(10), С. 5563 - 5580

Опубликована: Янв. 1, 2024

The efficient removal of trace impurities is significant for the production high-purity olefins. This review summarizes latest advancements in deep purification ethylene and propylene using MOF materials.

Язык: Английский

---

A novel hydrophobic carborane-hybrid microporous material for reversed C₂H₆ adsorption and efficient C₂H₄/C₂H₆ separation under humid conditions

Chemical Science, Год журнала: 2024, Номер 15(15), С. 5653 - 5659

Опубликована: Янв. 1, 2024

A novel hydrophobic carborane-hybrid microporous metal–organic framework ZNU-10 was prepared for reversed C 2 H 6 adsorption and efficient 4 /C separation under humid conditions.

Язык: Английский

---

A Highly Stable Anion-Functionalized Cage-like Framework for Efficient Separation of MTO Products under Harsh Conditions

ACS Materials Letters, Год журнала: 2025, Номер unknown, С. 837 - 844

Опубликована: Фев. 3, 2025

Язык: Английский

---

Pore Space Partition Enabled by Lithium(I) Chelation of a Metal–Organic Framework for Benchmark C₂H₂/CO₂ Separation

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Adsorptive separation of acetylene (C2H2) from carbon dioxide (CO2) offers a promising approach to purify C2H2 with low-energy footprints. However, the development ideal adsorbents simultaneous high adsorption and selectivity remains great challenge due their very small molecular sizes physical properties. Herein, we report lithium(I)-chelation strategy for pore space partition (PSP) in microporous MOF (Li+@NOTT-101-(COOH)2) achieve uptake selectivity. The chelation model Li+ ions within framework was visually identified by single-crystal X-ray diffraction studies. immobilized were found have two functions: (1) partitioning large cages into smaller ones while maintaining surface area (2) providing specific binding sites selectively take up over CO2. resulting Li+@NOTT-101-(COOH)2 exhibits rare combination capture capacity (205 cm3 g-1) C2H2/CO2 (13) at ambient conditions, far surpassing that NOTT-101-(COOH)2 (148 g-1 3.8, respectively) most top-tier materials reported. Theoretical calculations gas-loaded SCXRD studies reveal chelated combined segmented can bind amount through unique π-complexation, accounting improved Breakthrough experiments validated its excellent actual mixtures, one highest productivities 118.9 L kg-1 (>99.5% purity) single adsorption-desorption cycle.

Язык: Английский

---

Efficient C2H2/CO2 and C2H2/C2H4 separations in a novel fluorinated metal–organic framework

Separation and Purification Technology, Год журнала: 2023, Номер 332, С. 125777 - 125777

Опубликована: Ноя. 21, 2023

Язык: Английский

---

Efficient carbon dioxide capture from flue gas and natural gas by a robust metal–organic framework with record selectivity and excellent granulation performance

Separation and Purification Technology, Год журнала: 2024, Номер 343, С. 127099 - 127099

Опубликована: Март 13, 2024

Язык: Английский

---

Ideal Cage‐like Pores for Molecular Sieving of Butane Isomers with High Purity and Record Productivity

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(27)

Опубликована: Апрель 18, 2024

n-C

Язык: Английский

---

Single-Molecule Traps in Covalent Organic Frameworks for Selective Capture of C ₂ H ₂ from C ₂ H ₄ -Rich Gas Mixtures

Research, Год журнала: 2024, Номер 7

Опубликована: Янв. 1, 2024

Removing trace amounts of acetylene (C 2 H ) from ethylene 4 )-rich gas mixtures is vital for the supply high-purity C to chemical industry and plastics sector. However, selective removal challenging due similar physical properties . Here, we report a “single-molecule trap” strategy that utilizes electrostatic interactions between one-dimensional (1D) channel covalent organic framework (denoted as COF-1) molecules massively enhance adsorption selectivity toward over are immobilized via with O atom C=O groups, N C≡N phenyl groups in 1D channels COF-1. Due its exceptionally high affinity , COF-1 delivered remarkable uptake 7.97 cm 3 /g at 298 K 0.01 bar, surpassing all reported COFs many other state-of-the-art adsorbents under conditions. Further, demonstrated outstanding performance separation breakthrough experiments dynamic adsorbed capacity 0.17 2,000 s/g when exposed 0.5 ml/min -rich mixture (99% K, directly producing rate 3.95 /g. Computational simulations showed strong single-molecule traps were responsible excellent performance. also robust, providing promising new efficient practical purification.

Язык: Английский

---