A5078180808- Metal-Organic Frameworks: Synthesis and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Covalent Organic Framework Applications
- Fuel Cells and Related Materials
- Magnetism in coordination complexes
- Advanced Nanomaterials in Catalysis
- Carbon dioxide utilization in catalysis
- Solid-state spectroscopy and crystallography
- Nanoplatforms for cancer theranostics
- Enhanced Oil Recovery Techniques
- Polyoxometalates: Synthesis and Applications
- MXene and MAX Phase Materials
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Catalytic Processes in Materials Science
- Organic and Molecular Conductors Research
- Luminescence and Fluorescent Materials
- Mesoporous Materials and Catalysis
- Crystallography and molecular interactions
- Nanoparticle-Based Drug Delivery
- Crystal structures of chemical compounds
- Nonlinear Optical Materials Research
- CO2 Reduction Techniques and Catalysts
- Synthetic Organic Chemistry Methods
Ulsan National Institute of Science and Technology
2015-2025
Abstract There has been extensive research on the sensing of explosive nitroaromatic compounds (NACs) using fluorescent metal-organic frameworks (MOFs). However, ambiguity in mechanism hampered development efficient sensors. Here we report synthesis a hydroxyl-functionalized MOF for rapid and NACs examine detail its fluorescence quenching mechanisms. In chloroform, takes place primarily by exciton migration to ground-state complex formed between analytes. A combination hydrogen-bonding...
Abstract A metal–organic framework (MOF) having superprotonic conductivity, MOF‐808, is prepared by modulating the binding mode of sulfamate (SA) moieties grafted onto metal clusters. The activation SA‐grafted MOF‐808 at 150 °C changes SA from monodentate to bridging bidentate, thus converting neutral amido (‐S−NH 2 ) moiety more acidic cationic sulfiliminium (‐S=NH + moiety. Further, MOF‐808‐4SA‐150 results in efficient proton conduction than MOF‐808‐4SA‐60. At 60 and 95 % relative...
A few metal-organic frameworks (MOFs), which typically use strong acids as proton sources, display superprotonic conductivity (≈10-1 S cm-1 ); however, they are rare due to the instability of MOFs in highly acidic conditions. For first time, we report using a moderately guest, zwitterionic sulfamic acid (HSA), is encapsulated MOF-808 and MIL-101. HSA acts not only source but also proton-conducting medium its extensive hydrogen bonding ability zwitterion effect. new sustained concentration...
Tumor hypoxia poses a significant challenge in photodynamic therapy (PDT), which uses molecular oxygen to produce reactive species upon light excitation of photosensitizer. For mitigation, an enzyme catalase (CAT) can be beneficially used convert intracellular hydrogen peroxide oxygen, but its utility is significantly limited due the intrinsic membrane impermeability. Herein, we present direct integration CAT into outer surface unmodified metal-organic framework (MOF) nanoparticles (NPs) via...
Single crystalline hollow MOFs with cavity dimensions on the order of several micrometers and hundreds were prepared using a metal–organic polyhedron single crystal as sacrificial hard template.
Abstract MOF‐74 is one of the most explored metal–organic frameworks (MOFs), but its functionalization limited to dative post‐synthetic modification (PSM) monodentate solvent site. Owing nature organic ligand and framework structure MOF‐74, covalent PSM very demanding. Herein, we report, for first time, amine‐tagged defective Ni‐MOF‐74, which prepared by de novo solvothermal synthesis using aminosalicylic acid as a functionalized fragmented ligand. The amino group generates metal binding...
Abstract The placement of mixed building blocks at precise locations in metal–organic frameworks is critical to creating pore environments suitable for advanced applications. Here we show that the spatial distribution can be modulated by exploiting different temperature sensitivities diffusion coefficients and exchange rate constants blocks. By tuning reaction forward linker from one framework another isoreticular framework, core–shell microstructural uniform are obtained. strategy extended...
Targeted drug delivery systems based on metal-organic frameworks (MOFs) have progressed tremendously since inception and are now widely applicable in diverse scientific fields. However, translating MOF agents directly to targeted remains a challenge due the biomolecular corona phenomenon. Here, we observed that supramolecular conjugation of antibodies surface particles (MOF-808) via electrostatic interactions coordination bonding can reduce protein adhesion biological environments show...
A highly stable and rigid rod metal–organic framework (MOF) is obtained by the single-crystal-to-single-crystal transformation of a Zr6 cluster-based MOF with interconnected but geometrically mismatched building blocks. The results in significant contraction, which comes from formation infinite chains carboxylate- aquo-linked clusters as one-dimensional secondary unit. permanently microporous variety solvents, including H2O, even under very harsh conditions, such strongly acidic basic...
It is challenging to selectively promote the two-electron oxygen reduction reaction (2e-ORR) since highly ORR-active electrocatalysts are not satisfied with 2e-ORR and most likely go all way 4e-ORR, completely reducing dioxygen water. Recently, however, possibility of a preference over 4e-ORR was raised by extensively considering multiple ORR mechanisms employing potential-dependent activity measure for constructing volcano plots. Here, we realized preferred via an intramolecular double...
We report the synthesis of Zn-based polyoxometalate (ZnPOM) and its application in photocatalytic CO<sub>2</sub> reduction to CH<sub>4</sub>.
Multifunctional proteins were supramolecular conjugated to metal–organic framework for overcoming extracellular matrix of tumor microenvironment and targeting cancer cell.
A new synthetic approach for tunable mesoporous metal-organic frameworks (MeMs) is developed. In this approach, mesopores are created in the process of heat conversion highly mosaic framework (MOF) crystals with non-interpenetrated low-density nanocrystallites into MOF two-fold interpenetrated high-density nanocrystallites. The interpenetration reduces volume crystal, and accompanying localized agglomeration results formation among crystallite agglomerates. pore size can be easily modulated...
Incorporating functionality into the framework of metal-organic frameworks (MOFs) has attracted substantial interest because physical and chemical properties MOFs can be tuned by functionalizing pores. The ligand functionalization MOF-74 is challenging its pristine organic structure. Herein, we report a series ligand-functionalized Ni-MOF-74 derivatives synthesized defect engineering using mixed-ligand approach. Defect generation were simultaneously achieved incorporation fragmented ligands...
Abstract A few metal–organic frameworks (MOFs), which typically use strong acids as proton sources, display superprotonic conductivity (≈10 −1 S cm ); however, they are rare due to the instability of MOFs in highly acidic conditions. For first time, we report using a moderately guest, zwitterionic sulfamic acid (HSA), is encapsulated MOF‐808 and MIL‐101. HSA acts not only source but also proton‐conducting medium its extensive hydrogen bonding ability zwitterion effect. new sustained...
This research explores the alteration of metal–organic frameworks (MOFs) using a method called postsynthetic metal exchange. We focus on shift from Zn-based MOF containing [Zn4O(COO)6] secondary building unit (SBU) octahedral site symmetry (ANT-1(Zn)) to Fe-based one with [Fe3IIIO(COO)6]+ SBU trigonal prismatic (ANT-1(Fe)). The symmetry-mismatched transformation cleverly maintains MOF's overall structure by adjusting conformation flexible 1,3,5-benzenetribenzoate linker alleviate framework...
The 2D framework with guest molecules in the solvent pores shows reversible expansion and contraction, whereas without does not show under same conditions.
Chimeric metal–organic frameworks (CMOFs) composed of symmetry-mismatched inorganic and organic building blocks are rare because the interconnections between these topologically demanding. Herein, an MOF with symmetry-matched is used as a self-template for template-assisted synthesis CMOFs. Specifically, post-synthetic transformation [Zn4O(COO)6] clusters in self-templating into [Fe3IIIO(COO)6]+ trigonal prismatic site symmetry affords isoreticular CMOFs while maintaining template morphology...
Furans containing a β-ketoester group at 2-position undergo oxidative ring-opening by Mn(iii)/Co(ii) catalysts under an O2 atmosphere to produce 1,4-dicarbonyl moieties through endoperoxide intermediate, which consecutively cyclized with the unit afford 4-hydroxy-2-cyclohexen-1-ones. This oxidation/cyclization products were efficiently transformed into versatile benzofuran derivatives after consecutive aromatization and Paal-Knorr reaction.
Abstract MOF‐74 is one of the most explored metal–organic frameworks (MOFs), but its functionalization limited to dative post‐synthetic modification (PSM) monodentate solvent site. Owing nature organic ligand and framework structure MOF‐74, covalent PSM very demanding. Herein, we report, for first time, amine‐tagged defective Ni‐MOF‐74, which prepared by de novo solvothermal synthesis using aminosalicylic acid as a functionalized fragmented ligand. The amino group generates metal binding...
Abstract A metal–organic framework (MOF) having superprotonic conductivity, MOF‐808, is prepared by modulating the binding mode of sulfamate (SA) moieties grafted onto metal clusters. The activation SA‐grafted MOF‐808 at 150 °C changes SA from monodentate to bridging bidentate, thus converting neutral amido (‐S−NH 2 ) moiety more acidic cationic sulfiliminium (‐S=NH + moiety. Further, MOF‐808‐4SA‐150 results in efficient proton conduction than MOF‐808‐4SA‐60. At 60 and 95 % relative...
The pore space partition approach via post-synthetic linker insertion was used to modulate the porosity of a fragile Ag(i)-carboxylate framework with potentially large space. resulting Ag(i)-MOFs partitioned pores showed enhanced permanent compared nonpartitioned framework.