Construction of a Spherical Chiral Covalent Organic Framework for Efficient Asymmetric Aldol Catalysis

Journal of Solid State Chemistry, Год журнала: 2025, Номер unknown, С. 125350 - 125350

Опубликована: Апрель 1, 2025

Язык: Английский

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Organic Semiconductor‐Based Polarized Photodetectors for Next‐Generation Optoelectronics

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Abstract When light interacts with diverse media via reflection, transmission, and scattering, its polarization state alters, encoding the spectral information specific to object's features. With advancements in smart era, detection is progressing toward miniaturization, integration, enhanced multifunctionality, where polarization‐sensitive active layers are pivotal. Organic semiconductors—featuring chemically tailored photoelectric properties precisely engineered optical anisotropy, as well cost‐effectiveness flexibility—emerge promising candidates for next‐generation polarized‐light detection. This review highlights cutting‐edge progress of organic‐semiconductor–based photodetectors Beginning a brief introduction detection, it then summarizes recent developments organic materials sensitive linear circular light, specifically focusing on single crystals aligned conjugated polymers detection; chiral small molecules, polymers, supramolecules Advanced applications these materials, including imaging, biomimetic vision, encryption subsequently discussed. The concludes by highlighting prevailing challenges outlining future research directions essential advancing high‐performance, integrated this rapidly evolving field.

Язык: Английский

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Chiral Cross-Linked Covalent Organic Framework Films for Highly Sensitive Circularly Polarized Luminescence Probing

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

Опубликована: Март 3, 2025

The development of covalent organic framework (COF) films featuring circular polarization luminescence (CPL) probing remains a formidable challenge. Herein, we developed chiral cross-linked COF film to obtain uniform and dense (chirCOFilm) possessing highly sensitive CPL for enantiomers. axial cross-linkers (R-/S-BBNA) are initially introduced into the channels (COFilm/R-BBNA or COFilm/S-BBNA) by vapor-assisted epitaxial method. Then, olefin groups in R-/S-BBNA layers undergo cross-linking reaction under UV irradiation, forming chirCOFilm. obtained chirCOFilms have strong chirality with mirror images, fluorescence discoloration, intense properties. A multitude rich photopatterns chirCOFilm/PDMS flexible prepared taking advantage photochromic properties during illumination, showing potential application advanced anticounterfeiting. More importantly, realize phenethylamine enantiomers at 5% concentration, which can hardly be achieved from their corresponding probing. This study not only provides new strategy preparing using but also opens avenue achieving though CPL.

Язык: Английский

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Surfactant‐Assisted Construction of Covalent Organic Frameworks

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 27, 2025

Abstract Covalent organic frameworks (COFs), characterized by their unique ordered pore structures, chemical diversity, and high degree of designability, have demonstrated immense application potential across multiple fields. However, traditional synthesis methods often encounter challenges such as low crystallinity uneven morphology. The introduction surfactants has opened up new pathways for the COFs. Leveraging intermolecular interactions self‐assembly properties, can effectively regulate nucleation, growth processes, ultimate structure properties This paper systematically reviews latest research achievements future trends in surfactant‐assisted COF synthesis, emphasizing crucial role key additives preparation Surfactants not only facilitate uniform nucleation COFs, enhancing structural order products but also enable precise diverse regulation dimensionality, morphology, Furthermore, influencing dispersion processability enhance practicality workability. Finally, presents some prospects opportunities this emerging area.

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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Preparation and Resolution Performances of Chiral Stationary Phases Based on Spherical Covalent Organic Frameworks with Various Zeta Potentials

Journal of Chromatography A, Год журнала: 2025, Номер 1756, С. 466087 - 466087

Опубликована: Май 21, 2025

Язык: Английский

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