A5033854172- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Photocatalysis Techniques
- Covalent Organic Framework Applications
- Porphyrin and Phthalocyanine Chemistry
- Supramolecular Chemistry and Complexes
- Arsenic contamination and mitigation
- Catalytic Processes in Materials Science
- Chemical Thermodynamics and Molecular Structure
- Molecular Sensors and Ion Detection
- Magnetism in coordination complexes
- Catalysis and Hydrodesulfurization Studies
- Adsorption, diffusion, and thermodynamic properties of materials
- Polyoxometalates: Synthesis and Applications
- CO2 Reduction Techniques and Catalysts
- Luminescence and Fluorescent Materials
- Layered Double Hydroxides Synthesis and Applications
- Extraction and Separation Processes
- Carbon dioxide utilization in catalysis
- Fullerene Chemistry and Applications
- MXene and MAX Phase Materials
- Adsorption and Cooling Systems
- Carbon Dioxide Capture Technologies
- Copper-based nanomaterials and applications
American University of Beirut
2016-2025
University of Toronto
2014-2023
Université de Strasbourg
2009-2014
Centre National de la Recherche Scientifique
2008-2014
University of California, Los Angeles
2012
Institut de Chimie de Strasbourg
2009-2011
Institut de Chimie
2008-2009
We report a strategy to expand the pore aperture of metal-organic frameworks (MOFs) into previously unattained size regime (>32 angstroms). Specifically, systematic expansion well-known MOF structure, MOF-74, from its original link one phenylene ring (I) two, three, four, five, six, seven, nine, and eleven (II XI, respectively), afforded an isoreticular series MOF-74 structures (termed IRMOF-74-I XI) with apertures ranging 14 98 angstroms. All members this have noninterpenetrating exhibit...
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTNew Porous Crystals of Extended Metal-CatecholatesMohamad Hmadeh†‡, Zheng Lu†‡, Liu§, Felipe Gándara†‡, Hiroyasu Furukawa†‡, Shun Wan†‡, Veronica Augustyn⊥, Rui Chang⊥, Lei Liao‡, Fei Zhou⊥, Emilie Perre⊥, Vidvuds Ozolins⊥, Kazu Suenaga§, Xiangfeng Duan‡, Bruce Dunn⊥, Yasuaki Yamamto∥, Osamu Terasaki#□, and Omar M. Yaghi*†‡#View Author Information† ‡ †Center for Reticular Chemistry, Center Global Mentoring, ‡Department Chemistry Biochemistry,...
A facile method to produce zeolitic imidazolate frameworks (ZIF-8, ZIF-67, and solid–solution ZIFs (mixed Co Zn)) is reported. ZIF crystals are produced via a reaction–diffusion framework (RDF) by diffusing an outer solution at relatively high concentration of the 2-methyl imidazole linker (HmIm) into agar gel matrix containing metal ions (zinc(II) and/or cobalt(II)) room temperature. Accordingly, propagating supersaturation wave, initiated interface between matrix, leads precipitation front...
In this study, we report the successful incorporation of photoactive bis(4'-(4-carboxyphenyl)-terpyridine)ruthenium(II) (Ru(cptpy)2) strut into a robust metal-organic framework (MOF), AUBM-4. The single crystal X-ray analysis revealed formation new one-dimensional structure Ru(cptpy)2 complexes linked together by Zr atoms that are eight coordinated with O atoms. chemically stable MOF was employed as an efficient photocatalyst for carbon dioxide conversion to formate under visible light...
A versatile synthetic strategy, which was conceived and employed to prepare doubly threaded, bistable [c2]daisy chain compounds, is described. Propargyl 1-pentenyl groups have been grafted onto the stoppers of molecules obtained using a template-directed protocol. Such undergo reversible extension contraction upon treatment with acid base, respectively. The dialkyne-functionalized (AA) subjected an [AA+BB] type polymerization appropriate diazide (BB) afford linear, mechanically interlocked,...
The reverse water gas shift (RWGS) reaction driven by Nb
In this study, water-stable Zr-metal–organic framework (MOF) (UiO-66) nanoparticles of various defect concentrations were successfully prepared and examined as the adsorbent for arsenate removal from water. The induced defects resulted addition a monocarboxylic acid modulator [acetic or trifluoroacetic (TFA)] to synthesis mixture. effectively tuned controlled by changing type amount modulator. As result, different adsorption capacities water obtained, in which most modulated sample...
MOFs on the move: A copper-coordinated [2]pseudorotaxanate which reacts with zinc nitrate to form threefold interpenetrated networks retains most of its solution-state chemistry, including ability undergo electronic switching some copper(I) ions under redox control. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The publisher is...
Formic acid is considered as one of the most promising liquid organic hydrogen carriers. Its catalytic dehydrogenation process generally suffers from low activity, reaction selectivity, stability catalysts, and/or use noble-metal-based catalysts. Herein we report a highly selective, efficient, and noble-metal-free photocatalyst for formic acid. This catalyst, UiO-66(COOH)2-Cu, built by postmetalation carboxylic-functionalized Zr-MOF with copper. The visible-light-driven photocatalytic...
A series of derivatives the Zr-based MOF UiO-66 were synthesized, fully characterized, and tested for their efficiency in adsorption removal highly toxic elements lead (Pb(II)), cadmium (Cd(II)), arsenate As(V), selenite Se(IV). Different structural engineering techniques employed to alter properties Zr-MOFs, such as linker functionalization defect creation increase density sites. The UiO-66-based structures with carboxylate groups increased Pb(II) cations by more than 70% that Cd(II) 60%...
As the global quest for sustainable energy keeps rising, exploring novel efficient and practical photocatalysts remains a research industrial urge. Particularly, metal organic frameworks were proven to contribute various stages of carbon cycle, from CO2 capture its conversion. Herein, we report photo-methanation activity three isostructural, nickel-based incorporating additional niobium, iron, aluminum sites, having demonstrated exceptional abilities thin air in previous reports. The niobium...
Abstract The valorization of municipal solid waste permits to obtain sustainable functional materials. As the urban population burgeons, so does volume discarded waste, presenting both a challenge and an opportunity. Harnessing materials latent energy within this not only addresses issue disposal but also contributes innovation with applications in energy, electronics, environment sectors. In perspective, technologies for converting, after sorting, into valuable metals, chemicals, fuels are...
A new porous indium metal organic framework namely (AUBM-1) was successfully synthesized via a solvothermal reaction of pyromellitic acid and chloride. Single crystal X-ray analysis revealed the formation 3D with pts topology. The resulting MOF structure showed high chemical stability at different pH values. Thus, activated applied for As removal from water first time arsenate uptake capacity 103.1 mg g-1 neutral pH, which is higher than commercial adsorbents (usually less 100 pH). Finally,...
Abstract Sunlight‐driven catalytic hydrogenation of CO 2 is an important reaction that generates useful chemicals and fuels if operated at industrial scales can decrease greenhouse gas emissions into the atmosphere. In this work, photomethanation over highly dispersed nanostructured RuO catalysts on 3D silicon photonic crystal supports, achieving impressive conversion rates as high 4.4 mmol g cat −1 h ambient temperatures under high‐intensity solar simulated irradiation, reported. This...
This study investigates and compares arsenic, As(V), removal from aqueous media using the water-stable zinc metal–organic frameworks (Zn-MOF-74) prepared via room-temperature precipitation (RT-Zn-MOF-74) a solvothermal procedure (HT-Zn-MOF-74). The Zn-MOF-74 crystals possess average particle sizes of 66 nm 144 μm for RT-Zn-MOF-74 HT-Zn-MOF-74, respectively. Moreover, nanosized exhibited superior performance to HT-Zn-MOF-74. While Brunauer–Emmett–Teller surface area was smaller than that...
Photocatalytic CO2 reduction into formate (HCOO-) has been widely studied with semiconductor and molecule-based systems, but it is rarely investigated covalent organic frameworks (COFs). Herein, we report a novel donor-acceptor COF named Co-PI-COF composed of isoindigo metallated porphyrin subunits that exhibits high catalytic efficiency (∼50 μmol g-1 h-1) at low-power visible-light irradiation in the absence rare metal cocatalysts. Density functional theory calculations experimental...
Abstract The ability to control the kinetic barriers governing relative motions of components in mechanically interlocked molecules is important for future applications these compounds molecular electronic devices. In this Full Paper, we demonstrate that bipyridinium (BIPY 2+ ) dications fulfill role as effective electrostatic controlling shuttling and threading behavior rotaxanes pseudorotaxanes aqueous environments. A degenerate [2]rotaxane, composed two 1,5‐dioxynaphthalene (DNP) units...
Abstract Four different polymorphs of nanostructured iron oxyhydroxides, namely; goethite (α‐FeOOH), akaganeite (β‐FeOOH), lepidocrocite (γ‐FeOOH), and feroxyhyte (δ‐FeOOH) were synthesized fully characterized by X‐ray diffraction, electron microscopy, UV/Visible spectrophotometry, Brunauer–Emmett–Teller (BET) measurements, photoemission spectroscopy. The relationship between these oxyhydroxide their photocatalytic properties was explored examining the extent methylene blue (MB) degradation...
Metal-organic frameworks (MOFs) have emerged as an important class of hybrid organic-inorganic materials. One the reasons they gained remarkable attention is attributed to possibility altering them by postsynthetic modification, thereby providing access new and novel advanced MOFs been applied in catalysis, gas storage, separation, chemical sensing, drug delivery. However, their bactericidal use has rarely explored. Herein, we developed a two-step process for synthesis zirconium-based...
Metal–organic frameworks (MOFs) have emerged as a promising class of porous crystalline materials with outstanding physical and chemical properties. The significantly high surface area, permanent porosity, wide variety its building blocks resulted in the development thousands MOF structures covering array applications. UiO-66, zirconium subfamily MOFs (Zr6O4(OH)4(BDC)6 BDC = benzene dicarboxylate), has been especially attractive due to thermal stability when compared other MOFs. discovery...
In this work, we utilized electrospinning to develop advanced composite membranes of polyvinyl chloride (PVC) loaded with postmetalated metal-organic frameworks (MOFs), specifically UiO-66(COOH)2-Ag and ZIF-8-Ag. This innovative technique led the creation highly stable PVC/MOFs-Ag membrane composites, which were thoroughly characterized using various analytical techniques, including scanning electron microscopy, powder X-ray diffraction, thermogravimetric analysis, photoelectron...
In this study, the effective removal of three major micropollutants (e.g., propranolol hydrochloride, 1-naphthylamine, and 2-naphthol) from water is investigated using defected UiO-66 functionalized derivatives as adsorbents. The defects in are induced two distinct strategies. first one involves a process selectively thermolyzing labile linkers, leading to creation hierarchical mesoporous framework (HP-UiO-66). second technique employs monocarboxylic acid modulator, such acetic (AA) or...
We report a variety of [c2]daisy chain molecules which undergo quantitative, efficient, and fully reversible molecular movements upon the addition base/acid in organic solvents. Such externally triggered can induce contraction extension molecule as whole. A linear polymer such bistable exerts similar types be looked candidate for development artificial muscles. The spectrophotometric investigations both monomeric polymeric chains, well corresponding model compounds, were performed MeCN at...