Covalent organic frameworks (COFs) as metal-free photocatalysts have attracted extensive interest. However, the organic transformations photocatalyzed by COFs under mild conditions remain a challenge. Herein, a boron-dipyrromethene (BODIPY) based 1D COF, namely JNM-12, was facilely constructed by Schiff-base condensation reaction. JNM-12 exhibited strong visible-light harvesting abilities and suitable photocatalysis energy potentials, enabling the activation of O to superoxide anions (O ⋅ ) and singlet oxygen ( O ) under visible light irradiation. Benefiting from these properties, JNM-12 delivered excellent photocatalytic activity in the O ⋅ -mediated oxidative coupling of amines and O -engaged aerobic oxidation of enamines. Our work paves a new way for synthesis of COFs as efficient, economical, and green photocatalysts for organic synthesis.
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http://dx.doi.org/10.1002/asia.202300328 | DOI Listing |
Nat Commun
January 2025
Department of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
The generation of radicals through photo-Fenton-like reactions demonstrates significant potential for remediating emerging organic contaminants (EOCs) in complex aqueous environments. However, the excitonic effect, induced by Coulomb interactions between photoexcited electrons and holes, reduces carrier utilization efficiency in these systems. In this study, we develop Cu single-atom-loaded covalent organic frameworks (Cu/COFs) as models to modulate excitonic effects.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Materials Science and Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States.
Highly ion-conductive solid electrolytes of nonlithium ions (sodium or potassium ions) are necessary for pursuing a more cost-effective and sustainable energy storage. Here, two classes of sulfonated -NH-linked covalent organic frameworks (COFs), specifically designed for sodium or potassium ion conduction (named i-COF-2 (Na or K) and i-COF-3 (Na or K)), were synthesized through a straightforward, one-step process using affordable starting materials. Remarkably, these COFs demonstrate high ionic conductivity at room temperature─3.
View Article and Find Full Text PDFJ Chromatogr A
January 2025
State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, PR China. Electronic address:
Herein, using 1,3,5-triformylphloroglucinol (Tp) and 4,4',4″-(1,3,5-triazine-2,4,6-triyl) tris(1,1'-biphenyl) trianiline (Ttba) as ligands, nitrogen-rich triazine unit-based covalent organic frameworks (COFs) with a suitable pore size, named TpTtba-COFs, were synthesized, and they were employed as adsorbents for the extraction and detection of three bisphenols (BPs)-BP A (BPA), BP B (BPB), and BP S (BPS)-in water. Using 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (Tapt) and 1,3,5-tris(4-aminophenyl)benzene (Tapb) ligands as substitutes for Ttba, nitrogen-rich triazine unit-based COFs with a smaller pore size and nitrogen-poor triazine unit-based COFs, named TpTapt-COFs and TpTapb-COFs, respectively, were also prepared for comparison. The adsorption performances of the three COF adsorbents with regard to the three BPs were tested.
View Article and Find Full Text PDFJ Hazard Mater
January 2025
Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fujian, Fuzhou 350108, China. Electronic address:
Phenolic compounds are a kind of persistent organic pollutants (POPs), which are always a threat to human and environment due to their strong toxicity and low biodegradability. Therefore, developing a reliable method to simultaneously detect phenolic pollutants is of great importance to environmental safety and human health. Herein, we combined the advantages of metal organic frameworks (MOFs) and covalent organic frameworks (COFs) to prepare two cyclic trinuclear unit-based metal covalent organic framework (MCOFs, denoted as Cu-TDH COF and Cu-BDU COF) with large specific surface area, good stability and excellent laccase-like activity.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
January 2025
Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Research Center of New Material and Green Chemistry, Khazar University, 41 Mehseti Street, Baku AZ1096, Azerbaijan. Electronic address:
Free fentanyl is responsible for its pharmacological effects, but its total concentration is typically determined for therapeutic drug monitoring purposes. Determination of fentanyl concentration can help reduce the prescribed doses, leading to fewer side effects and increased effectiveness. Therefore, predicting free drug concentration in pharmaceutical research is crucial.
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