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A novel 3D (4,6)-connected topological architecture, obtained under ionothermal conditions by using 1-ethyl-3-methyl imidazolium bromide ([EMI]Br) as solvent and structure-directing agent, presents a non-centrosymmetric polar packing arrangement showing an interesting ferroelectric property.
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http://dx.doi.org/10.1039/c0cc04890a | DOI Listing |
Molecules
July 2025
Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
Covalent triazine frameworks (CTFs) have gained recognition as stable porous organic polymers, for example, for CO separation. From the monomer 4,4'-(phenazine-5,10-diyl)dibenzonitrile (pBN), new pBN-CTFs were synthesized using the ionothermal method with a variation in temperature (400 and 550 °C) and the ZnCl-to-monomer ratio (10 and 20). N adsorption yielded BET surface areas up to 1460 mg .
View Article and Find Full Text PDFChemSusChem
August 2025
Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain.
This work presents sodium poly(heptazine imide) (NaPHI)-based materials, synthesized in a NaCl medium, as highly effective platforms for CO capture. High crystallinity-an often-overlooked aspect in PHI frameworks-is identified as a key factor governing CO adsorption capacity in microporous structures. Thermogravimetric analysis and manometric studies reveal a CO uptake of ≈3.
View Article and Find Full Text PDFJ Colloid Interface Sci
June 2025
School of the Environment and Safety Engineering, School of Materials Science & Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technolo
Photocatalytic hydrogen production in pure water without oxygen precipitation is highly effective owing to the minimal efficiency of water oxidation for oxygen generation and the complexity of the reaction, yet it presents a significant hurdle. Here, we report the preparation of crystalline carbon nitride (CCN) homojunction-anchored Co atoms using the molten salt and reflux method. Our findings indicate that elevated temperature during ionothermal synthesis promotes the phase transition of poly(heptazine) imides (PHI) to poly(triazine) imides (PTI), and the homogeneous junction formed in this process promotes exciton dissociation as well as carrier migration through the built-in electric field formed by the semi-coherent interface.
View Article and Find Full Text PDFEnviron Res
May 2025
Zhejiang Key Laboratory of Solid Waste Pollution Control and Resource Utilization, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China. Electronic address:
Covalent organic frameworks (COFs) are highly porous crystalline polymers formed through covalent bonding of molecular building blocks. Numerous fabrication strategies have been developed, including solvothermal, ionothermal, microwave, mechanochemical, and sonochemical methods, alongside ligand substitution and post-modification techniques, which allow for precise control over the structures and properties of COFs. The exceptional physicochemical stability, large specific surface area, broad visible light absorption, and extended π-conjugated systems have sparked significant interest in photocatalytic applications.
View Article and Find Full Text PDFJ Colloid Interface Sci
May 2025
Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055 China. Electronic address:
In the typical ionothermal synthesis of crystalline carbon nitride (CCN), alkali metal halides are usually used in large amounts. Here, we report a new method for synthesizing poly (heptazine imide) (PHI) using only a trace amount of NaF, which is 20 times less than the amount of NaCl typically required to achieve the PHI structure. Different from the prevailing view that salts function primarily as templates and chelating agents during polymerization, our research revealed the unique role that NaF plays in the polymerization of PHI.
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