3D Covalent Organic Framework with “the” Topology

Small, Journal Year: 2024, Volume and Issue: 20(20)

Published: Jan. 26, 2024

Abstract Discovery of new topology covalent organic frameworks (COFs) is a mainstay in reticular chemistry and materials research because it not only serves as stepwise guide to the designed construction covalent‐organic architectures but also helps comprehend function from structural design point‐of‐view. Proceeding on this track, first 3D COF, TUS‐38, with constructed by reticulating planar triangular 3‐c node D 3h symmetry tetragonal prism 8‐c 2h via [3 + 8] reversible imine condensation reaction. TUS‐38 represents twofold interpenetrated multidirectional pore network high degree crystallinity integrity. Interestingly, stemming nitrogen‐rich s‐triazine rings electron‐deficient character ─C ═ N─ linkages composing framework that benefit charge–transfer hence dipole–dipole electrostatic interactions between iodine addition exclusive topological characteristics exotic net, achieves an exemplary capacity for vapor uptake reaching 6.3 g −1 . Recyclability studies evidence can be reused at least five times retaining 95% its initial adsorption capacity; while density functional theory (DFT) calculations have heightened understanding molecules framework.

Language: Английский

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3D Covalent Organic Frameworks with 16-Connectivity for Photocatalytic C(sp³)–C(sp²) Cross-Coupling

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(37), P. 25832 - 25840

Published: Sept. 4, 2024

The connectivity (valency) of building blocks for constructing 3D covalent organic frameworks (COFs) has long been limited to 4, 6, 8, and 12. Developing a higher remains great challenge in the field COF structural design. Herein, this work reports hierarchical expansion strategy making 16-connected construct COFs with sqc topology. [16 + 2] construction achieved by condensation between carbazolyl dicyanobenzene-based block (CzTPN) linear diamino linkers (BD or Bpy) affords two (named CzBD CzBpy COF). Furthermore, attributed well-organized donor-acceptor (D-A) heterojunction, Ni chelated (Ni@CzBpy COF) exhibits excellent performance photoredox/Ni dual catalytic C(sp

Language: Английский

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Atomically dispersed Ni active sites on covalent organic frameworks for heterogeneous metallaphotocatalytic C–N cross-coupling

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 345, P. 123698 - 123698

Published: Jan. 4, 2024

Language: Английский

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Topological Analysis and Structural Determination of 3D Covalent Organic Frameworks

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(19)

Published: Jan. 30, 2024

Abstract 3D covalent organic frameworks (3D COFs) constitute a new type of crystalline materials that consist range porous structures with numerous applications in the fields adsorption, separation, and catalysis. However, because complexity three‐periodic net structure, it is desirable to develop thorough structural comprehension, along means precisely determine actual structure. Indeed, such advancements would considerably contribute rational design application COFs. In this review, reported topologies COFs are introduced categorized according configurations their building blocks, comprehensive overview diffraction‐based determination methods provided. The current challenges future prospects for these will also be discussed.

Language: Английский

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Pore configuration control in hybrid azolate ultra-microporous frameworks for sieving propylene from propane

Nature Chemistry, Journal Year: 2024, Volume and Issue: 17(1), P. 141 - 147

Published: Nov. 15, 2024

Language: Английский

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A class of crystalline porous thermosetting polymers: scalable thermomolding synthesis and propylene purification

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

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Polypyrene Porous Organic Framework for Efficiently Capturing Electron Specialty Gases

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(24), P. 29468 - 29477

Published: June 10, 2023

The polypyrene polymer with an extended π-conjugated skeleton is attractive for perfluorinated electron specialty gas (F-gas) capture as the high electronegativity of fluorine atoms makes F-gases strongly electronegative gases. Herein, a porous organic framework (termed Ppy-POF) structure and excellent acid resistance was constructed. Systematic studies have shown that abundant structures gradient electric field distribution in Ppy-POF can endow it exceptional adsorption selectivity polarizable xenon (Xe), which has been collaboratively confirmed by single-component experiments, time-dependent rate tests, dynamic breakthrough etc. Electrostatic potential charge density difference based on Grand Canonical Monte Carlo simulations functional theory calculations demonstrate selective Xe attributed to strong charge-transfer effect polarization between These results manifest POF great efficiently capturing

Language: Английский

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Single-crystal polymers (SCPs): from 1D to 3D architectures

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(23), P. 8165 - 8193

Published: Jan. 1, 2023

The examples of single-crystal polymers, including 1D, 2D, and 3D architectures with unambiguous chemical structures, are discussed in this review, offering critical insights into their structure–property relationships design principles.

Language: Английский

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Metalation-Induced Triazine-Based Covalent Organic Framework as a High Performance Electrocatalyst for Oxygen and Hydrogen Evolution Reactions

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 4111 - 4120

Published: May 1, 2024

The pursuit of efficient and functionalized covalent organic framework (COF) nanomaterials holds significant importance given their potential applications across various fields. Notably, relevance extends to the sustainable production hydrogen, a promising future fuel, through water electrolysis. A β-ketamine-functionalized COF was prepared using Schiff base condensation 1,3,5-triformylphloroglucinol 1,3,5-tris(4-aminophenyl)triazine. as-prepared β-ketamine-linked chosen as precursor for postsynthetic modification, where β-ketamine moieties were effectively coordinated with metal ions such nickel (Ni), cobalt (Co), iron (Fe), resulting in functional metal-coordinated complexes designated Ni-COF, Co-COF, Fe-COF, respectively, electrocatalytic activity toward oxygen evolution reaction (OER) hydrogen (HER) systematically investigated. ensuing Ni-COF demonstrates significantly greater OER HER compared Co-COF Fe-COF. For HER, 0.5 M H2SO4 solution, requires an overpotential 208 mV achieve 10 mA cm–2 current density. OER, demands 302 reach same density 1 KOH surpassing state-of-the-art catalyst, RuO2, which required 370 attain Also, turnover frequency increases approximately 5 times bare material. Moreover, electrocatalyst exhibited excellent stability 24 h both demonstrating its superiority these reactions. This study underscores metalation-induced COF-based materials processes.

Language: Английский

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Donor‐Acceptor Interactions Enhanced Colorimetric Sensors for Both Acid and Base Vapor Based on Two‐Dimensional Covalent Organic Frameworks

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(11)

Published: Jan. 8, 2024

Abstract Due to the high surface area and uniform porosity of covalent organic frameworks (COFs), they exhibit superior properties in capturing detecting even trace amounts gases air. However, COFs materials that possess dual detected functionality are still less reported. Here, an imine‐based COF containing thiophene as a donor triazine acceptor form spatial‐distribution‐defined D‐A structures was prepared. system between facilitates charge transfer process during protonation imine units. The obtained exhibits simultaneous sensing ability toward both acidic alkaline vapors with obvious colorimetric functionality.

Language: Английский

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