Exploring new linkage chemistry for covalent organic frameworks (COFs) provides a strong driving force to promote the development of this emerging class of crystalline porous organic materials. Herein we report a strategy to synthesize COFs with azo linkage, one of the most important functional unit in materials science but having not yet been exploited as a linkage of COFs. This strategy is developed on the basis of in situ linker exchange, by which imine-linked COFs are completely transformed into azo-linked COFs (Azo-COFs). Moreover, distinct properties of Azo-COFs from their corresponding imine-linked precursors are observed, indicating unique property of Azo-COFs. This strategy provides a useful approach to develop new linkage chemistry for COFs. It also has established a synthetic method for azo-linked COFs, which not only enriches the family of COFs but also offers a platform to explore properties and applications of this class of crystalline porous conjugated polymers.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9023542 | PMC |
| http://dx.doi.org/10.1038/s41467-022-29814-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lichenase and Cellobiohydrolase Activities of a Novel Bi-Functional β-Glucanase from the Marine Bacterium sp. J103.
Mar Drugs
December 2024
Jeju Bio Research Center, Korea Institute of Ocean Science & Technology, Jeju-si 63349, Republic of Korea.
In this study, we report the molecular and enzymatic characterisation of Spg103, a novel bifunctional β-glucanase from the marine bacterium sp. J103. Recombinant Spg103 (rSpg103) functioned optimally at 60 °C and pH 6.
View Article and Find Full Text PDFExtending Conjugation Lengths of the Linkage Units in Triazine-Based Porous Polymers for Enhanced Photocatalysis.
Small Methods
December 2024
School of Chemical Engineering, The University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia.
Three triazine-based conjugated porous polymers (CPPs) are synthesized via a Pd-catalyzed Suzuki-Miyaura coupling reaction between derivatives of 2,4,6-tri(thiophen-2-yl)-1,3,5-triazine (TTT) and 2,4,6-triphenyl-1,3,5-triazine (TPT). Photocatalysis experiments demonstrate that the hydrogen evolution rate (HER) of ThTh-CPP (homopolymer of TTT) reach an exceptional 46.4 mmol g⁻¹ h⁻¹ without co-catalysts, surpassing ThPh-CPP (8.
View Article and Find Full Text PDFDeep eutectic solvent pretreatment of oil palm biomass: Promoted lignin pyrolysis and enzymatic digestibility of solid residues.
Int J Biol Macromol
December 2024
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China. Electronic address:
Herein, choline chloride/oxalic acid (ChCl/OA) and choline chloride/oxalic acid/ethylene glycol (ChCl/OA/EG) pretreatments of oil palm empty fruit bunches (EFB) and mesocarp fibers (MSF) were conducted to achieve protection of the lignin structure, while improving the enzymatic efficiency of the solid residues. Under the operating conditions of 90 °C and 6 h, ChCl/OA/EG demonstrated a higher lignin extraction selectivity and obtained solid residues with higher hemicellulose content compared to ChCl/OA. The digestibility of glucan and xylan in solid residues obtained using ChCl/OA/EG achieved 98.
View Article and Find Full Text PDFTailoring the Reprocessability of Thiol-Ene Networks through Ring Size effects.
Angew Chem Int Ed Engl
December 2024
Ghent University: Universiteit Gent, Department of Organic and Macromolecular Chemistry, Krijgslaan 281 S4, 9000, Ghent, BELGIUM.
Recycling thermosetting materials presents itself as a major challenge in achieving sustainable material use. Dynamic covalent cross-linking of polymers has emerged as a viable solution that can combine the structural integrity of thermosetting materials with the (re-)processability of thermoplastics. Thioether linkages between polymer chains are quite common, and their use dates back to the vulcanization of rubbers.
View Article and Find Full Text PDFA comprehensive review on microbial hyaluronan-degrading enzymes: from virulence factors to biotechnological tools.
Bioresour Bioprocess
December 2024
Key Laboratory of Carbohydrate Chemistry and Biotechnology of Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue No. 1800, Wuxi, 214122, People's Republic of China.
Hyaluronan (HA), a natural high molecular weight polysaccharide, has extensive applications in cosmetology and medical treatment. Hyaluronan-degrading enzymes (Hyals) act as molecular scissors that cleave HA by breaking the glucosidic linkage. Hyals are present in diverse organisms, including vertebrates, invertebrates and microorganisms, and play momentous roles in biological processes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!