Articles tagged with Covalent Organic Frameworks
Researchers develop heterocyclic-linked covalent organic frameworks (COFs) that utilize light to trigger specific redox reactions, reducing soluble uranium into insoluble forms. The materials have shown impressive photocatalytic uranium extraction efficiency and potential for environmental cleanup and nuclear fuel security.
Researchers developed a novel design strategy for constructing flexible COF photocatalysts, achieving precise control over pore curvature and photoelectric properties. The constructed photocatalyst exhibited excellent photocatalytic uranium removal performance in contaminated groundwater and tap water.
Researchers have developed a new approach to suppressing the shuttle effect in transition metal fluoride cathodes, leading to unprecedented discharge plateau voltage and high-performance thermal battery cathodes. The study focused on thermal batteries and utilized an ion-sieving concept to achieve selective confinement.
A large-area uniform three-dimensional covalent organic framework membrane is fabricated to stabilize Li-metal electrodes via solvation cages. The membrane features non-interpenetrating topology, promoting rapid ion transport and stabilizing the lithium metal anode.
Researchers discovered a new method for excluding water in covalent organic frameworks, leading to more efficient solutions for air pollution. The approach reveals that mismatches between simulations and experiments can be powerful clues for material design.
Researchers at Rice University developed a material that uses light to break down PFAS and other contaminants. The covalent organic framework (COF) material, grown directly onto a hexagonal boron nitride film, requires only light to activate its photocatalytic reactions.
A new photocatalyst has been developed that significantly boosts the efficiency and stability of hydrogen peroxide generation under visible light. The catalyst, known as a TTT COF, achieves nearly 30 millimoles per gram per hour in aqueous solution, outperforming its imine-based precursor.
Researchers have developed a promising new method to recover uranium from challenging wastewater streams using an indirect electrochemical process combined with a self-standing covalent organic framework electrode. The approach achieves high efficiency, long-term stability, and strong tolerance to chemically complex environments.
Researchers create a new material that dramatically boosts uranium extraction efficiency, addressing one of the key challenges in sustainable nuclear energy. The study introduces a special type of covalent organic framework (COF) that shows record-high efficiency and selectivity in isolating uranium from seawater.
Researchers developed a high-performance TA/DTTA-2-TMT photocatalyst that synergistically optimizes four key steps in photocatalytic hydrogen peroxide synthesis, significantly improving overall catalytic efficiency. The material achieves exceptional H2O2 yield with broadened light absorption range and enhanced charge carrier separation.
Researchers at CiQUS developed a sustainable method using red light and recyclable COF catalysts to promote chemical reactions efficiently. The study highlights the potential of COFs as red-light-active heterogeneous photocatalysts, offering a significant step toward greener chemical methodologies.
Researchers created a new material platform for non-volatile memories using covalent organic frameworks (COFs) and successfully installed electric-field-responsive dipolar rotors. The COFs' unique sln topology allows the rotors to flip without steric hindrance, enabling high thermal durability up to near 400°C.
Manuel Souto received the Young Researcher Award from the Spanish Royal Society of Chemistry for his leadership of the ElectroMolMat research group at CiQUS. The award recognizes his outstanding professional achievements and contributions to electroactive molecular materials.
Researchers engineered conjugation of donor and acceptor units in covalent organic frameworks to enhance photocatalytic H2O2 production. USTB-46 achieved a high yield of 8274 mmol g−1 h−1, attributed to optimized light absorption, thermodynamic catalytic activity, and compatible D-A units.
Scientists have successfully imaged the dynamic assembly of bilayer covalent organic frameworks in solution, providing new insights into controlled stacking and moiré superlattice formation. The breakthrough enables the creation of large-area two-layer 2D COFs with unique electronic properties.
Researchers developed a novel strategy to synthesize single-crystal sp²c-COFs, which exhibit enhanced electronic conductivity and magnetic properties compared to classical COFs. The synthesized single crystals show room-temperature metal-free ferromagnetism, addressing the bottleneck in synthesizing single-crystal COFs.
Researchers at NYU Abu Dhabi have developed a new material that efficiently detects and removes perfluorooctanoic acid (PFOA) from drinking water, potentially revolutionizing water purification efforts worldwide. The breakthrough addresses global concerns over PFAS, or 'forever chemicals', which pose severe health risks.
A new COF sensor can detect pH changes in plant xylem tissues, providing early warning of drought stress up to 48 hours before traditional methods. This technology enables timely detection and management of drought stress, optimizing crop production and yield.
Researchers have developed a sustainable synthesis route for covalent organic frameworks (COFs) that can capture carbon dioxide (CO2) efficiently. The frameworks are stable in water and electrolytes, making them suitable for waste gas cleaning and reducing greenhouse gas emissions.
Rice engineers developed a new synthesis strategy for covalent organic frameworks (COFs) that can be used to trap gases, filter water and speed up chemical reactions. The approach enables faster production of COFs with superior crystallinity and high efficiency in breaking down harmful chemicals.
Researchers at NYU Abu Dhabi have developed nanoscale covalent organic frameworks (nCOFs) modified with peptides to treat triple-negative breast cancer. The COFs selectively release drug cargo within the acidic environment of tumors, improving treatment effectiveness and minimizing side effects.
Researchers have developed dynamic COFs that can open and close pores in a controlled manner, enabling targeted manipulation of structural and optoelectronic properties. This ability makes the materials promising for future applications in electronics and information technology.
Researchers at NUS developed hexavalent photocatalytic COFs for efficient hydrogen peroxide production via natural photosynthesis. The innovative materials overcome key challenges by delivering charges and reactants to catalytic sites efficiently, achieving impressive metrics of 7.2 mmol g‑h’‑‑ and 18% apparent quantum yield.
Researchers design COFs with precise density and position to alter energy density of electrode materials, promoting metal ion migration. The structure and properties of COFs are crucial for achieving high-performance, stable, and sustainable alkaline ion battery systems.
Scientists at Tokyo Institute of Technology discovered a method to generate three types of structural isomers in 3D-COFs, increasing their diversity and potential applications. The creation of these isomers allows for tunable properties such as density and pore size.
Rice University researchers have developed a new method for making covalent organic frameworks (COFs) that could revolutionize various fields such as energy applications, semiconductor devices, and drug delivery. The fast and low-cost approach uses vapor deposition to produce ordered 2D crystalline COFs.
Scientists have created a new class of solid-state phase change materials using sugar alcohols, which can store-and-release heat more efficiently. By confining these compounds in covalent organic framework crystals, the researchers were able to suppress supercooling and retrieve thermal energy at higher temperatures.
Researchers from Tokyo Institute of Technology have developed a novel synthesis method for imine-based COFs, eliminating the need for long reaction times, high temperatures, and Lewis acid catalysts. The method uses an electrogenerated acid as a catalyst, enabling direct fixation of COF films onto electrodes.
A team from Ames National Laboratory solved the structure of boron monoxide, a compound first discovered in the 1940s, using new nuclear magnetic resonance (NMR) methods and techniques. The researchers found that the material forms nanosheets with a turbostratic arrangement.
Researchers have developed a novel 3D covalent organic framework, TUS-64, with the largest pore size and lowest density ever recorded. The material shows promise as a drug nanocarrier vehicle, with high capacity to hold drugs and sustained release rate.
Researchers at the University of California, Berkeley, have created a new type of 'chain mail' material called an infinite catenane, which can be synthesized in a single step. This material is flexible, strong, and resilient like chain mail, and has potential applications in airplanes, armor, and robotics.
A research team at NIMS successfully synthesized a two-dimensional silicon-integrated covalent organic framework film on a metal surface. The technique may be applied to develop new materials in a bottom-up manner, with potential applications in battery materials and catalysts.
Researchers at Tokyo University of Science have developed a unique 3D COF with scu-c topology, exhibiting efficient gas adsorption and drug delivery capabilities. The material has been shown to exhibit excellent hydrogen and methane adsorption properties.
Researchers developed a method to modulate molecular orbital energies, charge transport capacities, and spin electron densities of active units in covalent organic frameworks. This approach improves the stability of organic radicals and enhances the redox activity of COFs, leading to optimized lithium ion storage.
Researchers highlight the potential of covalent organic frameworks (COFs) in solar-to-fuel production, converting sunlight into hydrogen and other fuels. COF-based photocatalysts have shown promising properties, including improved catalysis and electron delocalization, making them a viable solution for future energy needs.
Researchers developed a COF-LZU1 coating to redistribute Li-ions, improving battery performance. The coating's nanochannels hinder anion migration, increasing the Li-ion transference number and transforming mossy or dendritic Li into smooth deposition.
Recent developments in COFs' postsynthetic functionalization have introduced wide ranges of organic to inorganic functional constituents, enhancing stability and performance. The authors emphasize the importance of functionalization for creating COF-based smart materials, highlighting challenges in their future development.
A team of researchers from the University of Delaware and Jilin University has synthesized the most stable crystalline porous material on record, a polyarylether-based covalent organic framework. This material can sift antibiotic residue out of water in a pH ranging from 1 to 13 and is stable up to 400 degrees Celsius.
A Northwestern University team has developed a nanomaterial that can store large amounts of electrical energy like a battery and charge rapidly like a supercapacitor, promising to improve electric car efficiency. The material's stability allows for 10,000 charge/discharge cycles, making it suitable for commercial applications.
Researchers have successfully woven the first three-dimensional covalent organic frameworks (COFs) from helical organic threads, displaying significant advantages in structural flexibility and reversibility. The woven COFs can be switched between two states of elasticity reversibly without degrading or altering the structure.
Researchers at the National Institutes of Natural Sciences have developed stable, crystalline, porous covalent organic frameworks (COFs) that can be used as platforms for functional exploration. The COFs exhibit enhanced catalytic activity and enantioselectivity in asymmetric Michael reactions.