A5090210886- Metal-Organic Frameworks: Synthesis and Applications
- Synthetic Organic Chemistry Methods
- Covalent Organic Framework Applications
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organometallic Complex Synthesis and Catalysis
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Chemical Synthesis and Analysis
- Advanced Battery Materials and Technologies
- Boron and Carbon Nanomaterials Research
- Silicone and Siloxane Chemistry
- Luminescence and Fluorescent Materials
- Machine Learning in Materials Science
- Polyoxometalates: Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Molecular Sensors and Ion Detection
- Organic Light-Emitting Diodes Research
- ZnO doping and properties
- Cyclopropane Reaction Mechanisms
- Inorganic and Organometallic Chemistry
- Chemical Synthesis and Reactions
- Dendrimers and Hyperbranched Polymers
- Membrane Separation and Gas Transport
King Abdullah University of Science and Technology
2018-2024
Polish Academy of Sciences
2011-2021
Institute of Organic Chemistry
2011-2021
Illinois State University
1972
Ammonium ions (NH4+), as non-metallic charge carriers, have spurred great research interest in the realm of aqueous batteries. Unfortunately, most inorganic host materials used these batteries are still limited by sluggish diffusion kinetics. Here, we report a unique hydrogen bond chemistry to employ covalent organic frameworks (COFs) for NH4+ ion storage, which achieves high capacity 220.4 mAh g-1 at current density 0.5 A g-1. Combining theoretical simulation and analysis, universal...
Abstract New covalent organic frameworks (COFs), encompassing redox‐functionalized moieties and an aza‐fused π‐conjugated system, are designed, synthesized, deployed as negative electrodes in asymmetric supercapacitors (ASC), for the first time. The Hex‐Aza‐COFs synthesized based on solvothermal condensation reaction of cyclohexanehexone aromatic tetramines with benzoquinone (Hex‐Aza‐COF‐2) or phenazine (Hex‐Aza‐COF‐3). show a specific capacitance 585 F g −1 Hex‐Aza‐COF‐2 663 Hex‐Aza‐COF‐3...
Herein, we report a new light-harvesting mixed-ligand Zr(IV)-based metal–organic framework (MOF),with underlying fcu topology, encompassing the [Zr6(μ3-O)4(μ3-OH)4(O2C−)12] cluster and an equimolar mixture of thiadiazole- benzimidazole-functionalized ligands. The successful integration ligands with similar structural features but notable chemical distinction afforded attainment highly efficient energy transfer (ET). Notably, very strong spectral overlap between emission spectrum...
In this work, we describe a highly efficient and reabsorption-free X-ray-harvesting system using luminescent metal-organic framework (MOF)-fluorescence chromophore composite films. The ultrafast time-resolved experiments density functional theory calculations demonstrate that nearly 100% energy transfer from MOF with high atomic number to an organic thermally activated delayed fluorescence (TADF) character can be achieved. Such unprecedented efficiency of interfacial the direct harnessing...
Abstract Aqueous magnesium ion‐based batteries have attracted significant research interest due to the two‐electron transfer process, small cation radius, low reduction potential as well inert hydrogen evolution reaction. However, high surface charge density of divalent Mg 2+ ions results in sluggish solid‐state diffusion kinetics, which significantly limits number host materials suitable for effective ion storage. Here, first time, covalent organic frameworks (COFs) are explored high‐rate...
New molecular-weight-enlarged metathesis catalysts, which bear polyhedral oligomeric silsesquioxane (POSS) tags, were synthesized and characterized. The catalysts can be recovered from the reaction mixture by using nanofiltration techniques reused. It was found that membranes Starmem 228 PuraMem 280 successfully separate catalyst post-reaction mixtures to below 3 ppm. application of these POSS-tagged in a continuous also investigated.
Herein we report novel mesoporous zirconium-based metal-organic frameworks (MOFs) with zeolitic sodalite (sod) topology. Zr-sod-ZMOF-1 and -2 are constructed based on a cantellation design strategy. Distinctly, organic linkers judiciously designed in order to promote the deployment of 12-coordinated Zr hexanuclear molecular building block (MBB) as tetrahedral secondary unit, prerequisite for zeolite-like nets. The resultant Zr-sod-ZMOFs exhibit mesopores diameter up ≈43 Å, while pore volume...
Access to metal-organic frameworks (MOFs) with enhanced mechanical stability is key their successful deployment in practical applications. However, the high porosity of material often affects stability. In this article, achieve highly porous MOFs stability, we explored merged-net approach where two relatively fragile were merged into a robust MOF structure. We demonstrate effectiveness by computationally evaluating properties sph-MOFs varying lengths linkers. Prominently, pinpoint...
Rational design of intricate multicomponent reticular structures is often hindered by the lack suitable blueprint nets. We established merged-net approach, proffering optimal balance between designability and complexity, as a systematic solution for rational assembly structures. In this work, methodically mapping node-net relationships among 53 basic edge-transitive nets, we conceived signature net map to identify merging pairs, resulting in enumeration merged developed practical algorithm...
Abstract A series of ruthenium catalysts has been screened in the self‐metathesis 1‐dodecene with and without addition benzoquinones. Many these demonstrated excellent selectivity yields as low 10 ppm catalyst loading. Reactions have conducted under decreased pressure or argon bubbling, which caused a tremendous increase yield examined process.
Readily available ethyl chlorofluoroacetate, when treated with a strong base, forms an α-chloro-α-fluorocarbanion that adds to nitroarenes at position ortho or para the nitro group formation of anionic σH adducts. Subsequent base-induced β-elimination HCl proceeds selectively give nitrobenzylic α-fluorocarbanions and, upon protonation, α-fluoro-α-nitroarylacetates.
This study reports on the optoelectronic properties of porphyrin-based metal-organic framework (MOF) thin films fabricated by a facile liquid-phase epitaxy approach. approach affords growth MOF that are free morphological imperfections, more suitable for applications. Chemical modifications such as porphyrin ligand metallation have been found to preserve morphology grown making this particularly molecular alteration film without compromising its mesoscale significantly. Particularly, was be...
Highly luminescent metal–organic frameworks (MOFs) have recently received great attention due to their potential applications as sensors and light-emitting devices. In these MOFs, the highly ordered fluorescent organic linkers positioning prevents excited-state self-quenching rotational motion, enhancing light-harvesting properties. Here, exciton migration between with same chemical structure but different protonation degrees in Zr-based MOFs was explored deciphered using ultrafast laser...
In recent years, N-heterocyclic carbene (NHC) or phospine groups have been put forward as candidate catalysts ligands for olefin metathesis reactions to be performed using multistep methods. Some of these proposed contain polyhedral oligomeric silsesquioxane (POSS) structures linked NHC rings by means alkyl chains. important properties the prediction catalytic activity, such theoretically defined buried volume, are related conformational characteristics complex that can studied through...
Aggregation-induced emission enhancement (AIEE) is a process recently exploited in solid-state materials and organic luminophores, it explained by tight-molecular packaging. However, solution-phase AIEE its formation mechanism have not been widely explored. This work investigated phenomena two donor–acceptor–donor-type benzodiazole-based molecules (the building block metal–organic frameworks) with an acetylene phenyl π-conjugated backbone tapered carboxylic acid group at either end. was done...
A set of nitro-activated ruthenium-based Hoveyda-Grubbs type olefin metathesis catalysts bearing sterically modified
The scope of ruthenium (Ru)-catalyzed cross metathesis (CM) allyl-decorated polyhedral oligomeric silsesquioxanes (POSS) was explored. A variety different commercial and non-commercial complexes were tested to determine that the nitro-activated Ru catalyst is optimal for this transformation. reported transformation used prepare selected hybrid steroid-POSS compounds.