Photons, Excitons, and Electrons in Covalent Organic Frameworks

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(47), С. 32161 - 32205

Опубликована: Ноя. 18, 2024

Covalent organic frameworks (COFs) are created by the condensation of molecular building blocks and nodes to form two-dimensional (2D) or three-dimensional (3D) crystalline frameworks. The diversity with different properties functionalities large number possible framework topologies open a vast space well-defined porous architectures. Besides more classical applications materials such as absorption, separation, catalytic conversions, interest in optoelectronic COFs has recently increased considerably. electronic both their linkage chemistry can be controlled tune photon absorption emission, create excitons charge carriers, use these carriers photocatalysis, luminescence, chemical sensing, photovoltaics. In this Perspective, we will discuss relationship between structural features properties, starting connectivity, layer stacking 2D COFs, control over defects morphology including thin film synthesis, exploring theoretical modeling structural, electronic, dynamic discussing recent intriguing focus on photocatalysis photoelectrochemistry. We conclude some remarks about present challenges future prospects powerful architectural paradigm.

Язык: Английский

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A Facile Micelle-Assisted Self-Assembly Method to Covalent Organic Framework Helical Nanoarchitectures

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

Опубликована: Апрель 1, 2025

We present a micelle-assisted self-assembly strategy for synthesizing covalent organic framework (COF) helical hollow nanoribbons by using achiral monomers and surfactants. The process involves polymerization of nanowires within rod-like micelle cores, followed their attachment to form solvothermal crystallization create COF architectures. This method allows the controllable synthesis nanostructures with tunable pitch morphology can be extended other architectures variation amine monomer. provides new insights into designing building blocks micellar systems.

Язык: Английский

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A covalent organic framework nanosheet-nanochannel composite with signal amplification strategy for electrochemical enantioselective recognition

Talanta, Год журнала: 2024, Номер 277, С. 126331 - 126331

Опубликована: Май 30, 2024

Язык: Английский

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Conformational Chirality of Single-Crystal Covalent Organic Frameworks

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(49), С. 34064 - 34069

Опубликована: Ноя. 29, 2024

The crystallization of organic polymers is often hindered by chiral units, hence resulting in typically existing as amorphous or partially crystalline phases such natural rubber and cellulose. Similarly, an emerging polymer, covalent frameworks (COFs) also inevitably face a delicate balance between units crystallization, limiting their production applications separation, catalysis, optics. Here, we present general strategy for producing series conformational COFs with high crystallinity through breaking the meso conformation achiral COFs. Conformational chirality COF-300 was constructed involving amino-acid derivative templates during synthesis proven to have excellent thermodynamic (200 °C annealing air) dynamic stability (61% cell volume change). stereochemistry crystals can be controllably tuned templates, wide-range circular dichroism signals from ultraviolet infrared wavelengths absorption dissymmetry factors (

Язык: Английский

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Isomeric covalent organic frameworks: opportunities and challenges

Trends in Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Recent Advance in the Synthesis and Applications of Chiral Covalent Organic Frameworks: A Mini‐Review

Journal of Separation Science, Год журнала: 2025, Номер 48(2)

Опубликована: Фев. 1, 2025

ABSTRACT Chiral covalent organic frameworks (CCOFs) are emerging porous materials with tunable chiral structures, abundant pores, and high surface areas, gaining significant attentions in separation, sensing, asymmetric catalysis. This review summarizes the synthesis methods of CCOFs their applications recognition. It discusses advantages limitations three strategies, including post‐modification, direct synthesis, chiral‐induced synthesis. The also highlights potential catalysis for efficient purification, detection, molecules. Challenges future directions preparation application addressed, aiming to guide further research practical applications.

Язык: Английский

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Homochiral versus Racemic 2D Covalent Organic Frameworks

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

Опубликована: Май 15, 2025

The synthesis of homochiral two-dimensional covalent organic frameworks (2D COFs) from chiral π-conjugated building blocks is challenging, as units often lead to misaligned stacking interactions. In this work, we introduce helical chirality into 2D COFs using configurationally stable enantiopure and racemic [5]helicenes linkers in the backbone [5]HeliCOFs powders films. Through condensation with 1,3,5-triformylbenzene (TFB) or 1,3,5-triformylphloroglucinol (TFP), our approach enables efficient formation a set [5]HeliCOFs. resulting carbon-based crystalline porous exhibit distinct structural features different properties between counterparts. Propagation leads observation advanced chiroptical far-red visible spectrum, along less compact structure compared frameworks. Homogeneous thin films disclosed photoluminescent arising controlled growth highly ordered lattices. present study offers insight general framework extends Liebisch-Wallach rule COFs.

Язык: Английский

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Aqueous synthesis of three-dimensional helical covalent organic frameworks with hierarchical chirality

Polymer, Год журнала: 2024, Номер unknown, С. 127991 - 127991

Опубликована: Дек. 1, 2024

Язык: Английский

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