Recent Advances in Room-Temperature Synthesis of Covalent Organic Frameworks

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Room-temperature synthesis bridges the gap between chemistry and practical application of COFs. This review provides an overview characterization technologies COF growth mechanisms recent room-temperature synthetic strategies.

Язык: Английский

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Regulating the Isomerization Geometry and Energy State of Covalent Organic Frameworks for Enhanced Oxygen Reduction Activity

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract Embedding isomer entities onto crystalline frameworks with precisely defined spatial distributions represents a promising approach to enhancing the efficiency of oxygen reduction reaction (ORR) in fuel cells. However, accurately constructing covalent organic (COFs) regulate energy state effectively remains significant challenge. Herein, an innovative geometric isomerization strategy aimed at minimizing rotational barrier (ΔE), average local ionization (ALIE), and Gibbs free (ΔG) for ORR within COFs is proposed. Based on this strategy, isomeric Py‐COF‐αα 2,2‐substitution, Py‐COF‐ββ 3,3‐substitution, Py‐COF‐αβ 2,3‐substitution mainchain have been obtained. The electronic states intermediate adsorption capabilities are finely tuned through modification, yielding controllable chemical activity. Notably, lower ΔE between thiophenes achieves remarkable performance, evidenced by half‐wave potential 0.77 V vs reversible hydrogen electrode (RHE), surpassing most reported metal‐free electrocatalysts. Combined theoretical prediction situ Raman spectra, it revealed that increased dipole moment non‐uniform charge distribution caused endows pentacyclic‐carbon (thiophene β‐position) far from sulfur atoms efficient catalytic This work has opened up novel paradigm underscores pivotal role regulation facilitating catalysis.

Язык: Английский

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Efficient Conversion and Highly Sensitive Detection of PAEs in Milk Based on Hydrazinolysis Reaction and Hydrogen Bonding Using SERS Technique.

Analytica Chimica Acta, Год журнала: 2025, Номер 1345, С. 343737 - 343737

Опубликована: Фев. 1, 2025

Язык: Английский

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A novel SERRS approach for the highly sensitive detection of bilirubin levels in urine

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2025, Номер 335, С. 125993 - 125993

Опубликована: Март 5, 2025

Язык: Английский

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Research on the Characterization of Heterogeneous Catalysts and Reactions Based on Surface‐Enhanced Raman Spectroscopy

Journal of Raman Spectroscopy, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

ABSTRACT Surface analysis techniques play a crucial role in elucidating heterogeneous catalytic reactions. Among these, surface‐enhanced Raman spectroscopy (SERS) stands out due to its exceptional surface detection sensitivity and unique ability provide molecular fingerprints. However, the limitations of SERS technology, particularly poor material morphological universality, significantly impede development. This paper summarizes series innovative strategies developed by our group for study catalysts reactions, such as core‐shell nanostructure “borrowing” strategy SHINERS‐satellite strategy. These methods successfully overcome traditional SERS, thereby paving new pathways situ characterization reactions using technology practical applications. By employing these strategies, we not only conducted in‐depth investigations into key oxygen reduction reaction (ORR) hydrogen evolution (HER), but also obtained direct spectroscopic evidence critical intermediate species. Moreover, combination with density functional theory (DFT) calculations other advanced analytical techniques, analyzed mechanisms structure–activity relationships at level. Lastly, this provides prospective outlook on future development trends field catalysis.

Язык: Английский

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Electro-Fenton degradation of emerging contaminants using Cu-Co bimetallic-modified nickel foam cathodes: The role of metal surface structure and singlet oxygen

Separation and Purification Technology, Год журнала: 2025, Номер 368, С. 133050 - 133050

Опубликована: Апрель 17, 2025

Язык: Английский

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Unraveling Mechanism of Hydrogen Evolution Reactions in Alkaline media: Recent Advances in In-situ Raman Spectroscopy

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

In situ Raman spectroscopy used for monitoring the electrocatalytic process reveals hydrogen evolution reaction mechanism, providing theoretical guidance fabricating efficient catalysts.

Язык: Английский

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