Cited by Robust Phosphine-based Covalent-Organic Framework Palladium Catalysts for the Highly Efficient Carbonylation Coupling Reaction

Enhancing photocatalytic hydrogen peroxide generation by tuning hydrazone linkage density in covalent organic frameworks DOI

Avanti Chakraborty,

Akhtar Alam,

Uttam Pal

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 8, 2025

The conversion of solar energy into chemical or high-value chemicals has attracted considerable research interest in the context global crisis. Hydrogen peroxide (H2O2) is a versatile and powerful oxidizing agent widely used synthesis medical disinfection. H2O2 also serves as clean source fuel cells, generating electricity with zero-carbon emissions. Recently, sustainable production from water oxygen using covalent organic frameworks (COFs) photocatalysts attention; however, systematic studies highlighting role linkages determining photocatalytic performance are scarce. Under these circumstances, herein, we demonstrate that varying imine hydrazone within framework significantly influences production. COFs high-density linkages, providing optimal docking sites for oxygen, enhance generation activity (1588 μmol g−1 h−1 pure air), leading to highly efficient solar-to-chemical conversion. This work systematically investigates effect linkage density on enhancement hydrogen generation, aim achieving high-performance photocatalysis.

Language: Английский

Citations

Covalent organic frameworks as advanced materials for adsorption and analysis of contaminants in environmental, biological and food matrices DOI

Yanmin Liang,

Yan Qi,

Nannan Zhong

et al.

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 533, P. 216507 - 216507

Published: Feb. 21, 2025

Language: Английский

Citations

Ketazine-Linked Crystalline Porous Covalent Organic Frameworks DOI

Xinyu Mu,

Shuailei Xie,

Xingyao Ye

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(36), P. 25118 - 25124

Published: Aug. 30, 2024

Covalent organic frameworks (COFs) are a class of crystalline porous materials with well-defined π arrays and ordered channels, which can be predesigned topology diagram prepared via polycondensation reaction. Over the past decade, various types building units different functional groups have been developed. Among them, aldehyde is one most widely used monomers that form COFs azine, hydrazine, imine, squaranine, C═C linkages. In contrast, its closest analogue, i.e., ketone, despite broad structural diversity, has not yet investigated for design synthesis COFs. Herein we report first examples ketazine-linked by developing ketones as to enable hydrazine under solvothermal conditions. We observed careful screening reaction conditions including solvent, catalyst, concentration, temperature, time leads finding optimal polymerization systems produce highly Surprisingly, ketazine linkage enables conjugation between knot linker sites renders resultant able emit strong blue fluorescence, highlighting electronic features this new family Our findings bring unprecedented structures, functions, applications field

Language: Английский

Citations

Rapid Crystallization and Versatile Metalation of Acetylhydrazone-Linked Covalent Organic Frameworks for Heterogenous Catalysis DOI

Gao-Feng Liu, Zhiwei Li, Zijun Huang

et al.

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

Published: Jan. 3, 2025

Covalent organic frameworks (COFs) hold promise in heterogeneous metal catalysis benefiting from their robust, crystalline, and porous structures. However, synthetic challenges persist prolonged crystallization times, limited loading, uncertain coordination environments. Here, we present the rapid versatile metalation of new acetylhydrazone-linked COFs (AH-COFs) by condensation ketone hydrazide components, featuring full conversion within 30 min under open-air mild conditions. The obtained AH-COFs exhibit exceptional thermal chemical stability, maintaining high crystallinity microporosity even harsh This method shows versatility

Language: Английский

Citations

Boosting Multicolor Emission Enhancement in Two-Dimensional Covalent–Organic Frameworks via the Pressure-Tuned π–π Stacking Mode DOI

Yixuan Wang, Yanfeng Yin, Baozhu Yang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Covalent-organic frameworks (COFs) are dynamic covalent porous organic materials constructed from emissive molecular building blocks. However, most two-dimensional (2D) COFs nonemissive or weakly in the solid state owing to intramolecular rotation and vibration together with strong π-π interactions. Herein, we report a pressure strategy achieve bright multicolor emission yellow red 2D triazine triphenyl imine COF (TTI-COF). Intriguingly, TTI-COF experiences 24-fold enhancement under mild of 2.7 GPa compared initial state. Joint experimental theoretical results reveal that restricted chemical bond vibrations reduced interactions originating offset stacking mode account for significant pressure-induced enhancement. Furthermore, such piezochromic behavior may be ascribed decreased energy gap enhanced intermolecular interaction. Our investigation offers constructive guidelines designing high photoluminescence performance.

Language: Английский

Citations

A Cu2+-triggered turn-on fluorescence non-enzymatic probe based on covalent organic framework for the detection of methyl parathion DOI

Zhangchi Xiao,

Yong Li, Yulun Nie

et al.

Analytica Chimica Acta, Journal Year: 2025, Volume and Issue: 1346, P. 343775 - 343775

Published: Feb. 5, 2025

Language: Английский

Citations

Modulating Linker Conjugation and Flexibility of Aggregation‐Induced Emission Covalent Organic Framework for Enhanced Luminescence DOI

Haifei Wan,

Xingxiang Wang,

Qinqin Nie

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Abstract In order to inhibit non‐radiative decay pathways of covalent‐organic frameworks (COFs), a strategy is proposed block intralayer conjugation and interlayer π–π stacking by using flexible aggregation‐induced emission (AIE) building blocks (4′,4′′′,4′′′′′,4′′′′′′′‐(1,2‐ethenediylidene) tetrakis[1,1′‐biphenyl]‐4‐carbaldehyde (TFBE)) connected weakly conjugated linker. By the TFBE as changing flexibility linker, TFBE‐COFs with different luminescence properties are obtained. Experimental theoretical results show that these have high crystallinity large layer spacing, among which photoluminescence quantum yield hydrazone (Hz)‐COF TFBE‐ODH (oxalyl dihydrazide (ODH)) in solid state reaches 26.28%, superior most COFs reported so far. The excellent attributed non‐planar geometry TFBE, inhibits quenching. Moreover, π‐electron delocalization‐induced leaps suppressed further enhances TFBE‐COFs. Hz‐COF exhibits sensing performance for trace tetracycline, detection limit 0.15 µ m . addition, white light‐emitting diodes coated manufactured achieve high‐quality light emission. This study provides new design application high‐emission COFs.

Language: Английский

Citations

Covalent organic frameworks supported geminal-atom catalysts for upcycling nitrate into single-cell protein DOI

Jingdong Feng,

Wenda Zhang, Han Zhao

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160681 - 160681

Published: Feb. 1, 2025

Language: Английский

Citations

Hydrazone-Linked Nanoporous Covalent Organic Framework for the Selective Detection and Efficient Removal of Chromium(III) DOI

Xiaoping Tan,

Fulan Zhang,

Jinrui Tang

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Language: Английский

Citations

High efficient adsorption of aflatoxins in peanuts by novel covalent organic framework through multiple interactions DOI

J. Fang, Dantong Li, Jie Li

et al.

Food Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 143919 - 143919

Published: March 1, 2025

Language: Английский

Citations