A5100681214- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Magnetism in coordination complexes
- Polyoxometalates: Synthesis and Applications
- Radioactive element chemistry and processing
- Supramolecular Chemistry and Complexes
- Supramolecular Self-Assembly in Materials
- Advanced Sensor and Energy Harvesting Materials
- Chemical Synthesis and Characterization
- Advanced Photocatalysis Techniques
- Luminescence and Fluorescent Materials
- Advanced Nanomaterials in Catalysis
- Dendrimers and Hyperbranched Polymers
- Neuroscience and Neural Engineering
- Molecular Sensors and Ion Detection
- Analytical Methods in Pharmaceuticals
- Analytical Chemistry and Sensors
- Catalytic Processes in Materials Science
- Carbon Dioxide Capture Technologies
- Zeolite Catalysis and Synthesis
- Biosensors and Analytical Detection
- Quantum and electron transport phenomena
- Carbon Nanotubes in Composites
Daegu Gyeongbuk Institute of Science and Technology
2016-2024
Lingnan University
2024
Princeton University
2023-2024
Kangwon National University
2023
Ewha Womans University
2008-2021
Gwangju Institute of Science and Technology
2016-2020
Kookmin University
2017-2018
Government of the Republic of Korea
2017
Korea Electrotechnology Research Institute
2014-2016
Texas A&M University
2011-2014
A metal–organic framework (MOF) for reversible alteration of guest molecule adsorption, here carbon dioxide, upon photochemical or thermal treatment has been discovered. An azobenzene functional group, which can switch its conformation light irradiation heat treatment, introduced to the organic linker a MOF. The resulting MOF adsorbs different amount CO2 after UV treatment. This remarkable stimuli-responsive adsorption effect demonstrated through experiments.
Despite great efforts, the development of a reliable way to assemble mesoporous metal–organic frameworks (mesoMOFs) remains challenge. In this work, we have designed cooperative template system, comprising surfactant (cetyltrimethylammonium bromide) and chelating agent (citric acid), for generation mesoMOF containing hierarchical system mesopores interconnected with microspores. The molecules form micelles bridges MOF micelles, making self-assembly crystal growth proceed under direction...
A multi-functional MOF was constructed from Cu paddlewheel motifs and a judiciously designed novel ligand bearing carboxylate, pyridine, amide groups. exhibits selective adsorption of CO(2) over CH(4) excellent catalytic activity in tandem one-pot deacetalization-Knoevenagel condensation reaction as cooperative catalyst.
Introduction of functionalized mesopores into microporous metal–organic frameworks (MOFs) can endow them with suitable properties for applications in gas storage, separation, catalysis, and drug delivery. However, common methods functionalization (including pre- post-synthetic modifications) the internal surface a MOF reduce pore size because additional functional groups fill up pores. We present metal–ligand–fragment coassembly strategy introduction (meso)pores various substituent on ligand...
Abstract Stimuli‐responsive metal–organic polyhedra (srMOPs) functionalized with azobenzene showed UV‐irradiation‐induced isomerization from the insoluble trans‐srMOP to soluble cis‐srMOP, whereas irradiation blue light reversed this process. Guest molecules were trapped and released upon cis‐to‐trans trans‐to‐cis of srMOPs, respectively. This study provides a new direction in ever‐diversifying field MOPs, while laying groundwork for class optically responsive materials.
Abstract Titanium(IV)‐based metal‐organic frameworks (Ti‐MOFs) have received significant attention in recent years due to their numerous photocatalytic applications. We herein prepare the single‐crystalline Ti‐carboxylate MOF (DGIST‐1) composed of an unprecedented Ti‐oxo chain cluster and porphyrinic ligand, TCPP (tetrakis(4‐carboxyphenyl)porphyrin). Preformed clusters were used as Ti 4+ sources avoid spontaneous hydrolysis condensation reactions traditional Ti‐alkoxide precursors, thus,...
Photoresponsive metal-organic polyhedra (PMOPs) have attracted expanding interests due to their modular nature with tunable functionality and variable responsive behaviors tailored conveniently by external-stimulus. However, photoresponsive efficiency is often compromised after activation because of desorption-triggered aggregation into bulk PMOPs, which limits utility in stimuli-responsive applications. Here, we report a case system that can overcome the problem achieve maximized polyhedral...
Lateral flow immunoassays (LFI) have shown great promise for point-of-care (POC) sensing applications, however, its clinical translation is often hindered by insufficient sensitivity early detection of diseases, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This mainly due to weak absorption signals single gold nanoparticles (AuNPs). Here, we developed AuNP clusters that maintain the red color isolated individual AuNPs, but increase colorimetric readout improve...
Abstract Cross‐responsive chemical sensors are in high demand owing to their ability distinguish a broad range of analytes. In this study, vapochromic sensor array based on metal–organic frameworks (MOFs), which exhibits distinct patterns when exposed volatile organic compounds (VOCs) and humidity, is developed. Conventional arrays consist various receptors that produce different responses. The MOF‐based comprises dicopper paddlewheel clusters dimethylamine azobenzene as binary colorimetric...
Herein we report for the first time synthesis of Cr(II)-based metal-organic polyhedra (MOPs) and characterization their porosities. Unlike isostructural Cu(II)- or Mo(II)-based MOPs, MOPs show unusually high gas uptakes surface areas. The combination comparatively robust dichromium paddlewheel units (Cr2 units), cage symmetries, packing motifs enable these materials to achieve Brunauer-Emmett-Teller areas up 1000 m2/g. Reducing aggregation upon activation makes pores more accessible than...
Acidimicrobium sp. Strain A6 (A6) can degrade perfluoroalkyl acids (PFAAs) by oxidizing NH
Book Review| September 03 2024 Understanding Korean Webtoon Culture: Transmedia Storytelling, Digital Platforms, and Genres Genres. By Dal Yong Jin. Cambridge, MA: Harvard University Asia Center, 2023. xvi, 230 pp. ISBN: 9780674291324. Jinhee Park Lingnan Search for other works by this author on: This Site Google Journal of Asian Studies 11281129. https://doi.org/10.1215/00219118-11281129 Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Facebook...
A dinuclear copper complex that binds tightly and selectively to oxalate over other dicarboxylates like malonate, succinate, glutarate has been developed. This receptor can be used for fluorescent detection of in water at physicological pH by chemosensing ensemble approach. Crystal structure bound the together with molecular mechanics DFT computations provide insights into tight selective binding anion receptor.
Electronics that degrade after stable operation for a desired operating time, called transient electronics, are of great interest in many fields, including biomedical implants, secure memory devices, and environmental sensors. Thus, the development materials is critical advancement electronics their applications. However, previous reports have mostly relied on achieving transience aqueous solutions, where time largely predetermined based initially selected at beginning fabrication....
Self-assembly-based structural transition has been explored for various applications, including molecular machines, sensors, and drug delivery. In this study, we developed new redox-active metal–organic frameworks (MOFs) called DGIST-10 series that comprise π-acidic 1,4,5,8-naphthalenediimide (NDI)-based ligands Ni2+ ions, aiming to boost ligand-self-assembly-driven study the involved mechanism. Notably, during synthesis of MOFs, a single-crystal–amorphous–single-crystal occurred within MOFs...
A metal-organic framework (MOF) with helical channels has been constructed by bridging chain secondary building units 2,6-di-p-carboxyphenyl-4,4'-bipyridine ligands. The activated MOF shows permanent porosity and gas adsorption selectivity. Remarkably, the exhibits a facile transition from micro- to meso-porosity.
Abstract Stimuli‐responsive metal–organic polyhedra (srMOPs) functionalized with azobenzene showed UV‐irradiation‐induced isomerization from the insoluble trans‐srMOP to soluble cis‐srMOP, whereas irradiation blue light reversed this process. Guest molecules were trapped and released upon cis‐to‐trans trans‐to‐cis of srMOPs, respectively. This study provides a new direction in ever‐diversifying field MOPs, while laying groundwork for class optically responsive materials.
The ability to chemisorb iodine is important for the safe long-term storage of fission products from nuclear reactors. Herein, we successfully used single-crystal X-ray diffraction analysis crystallographically visualize I2 binding sites in two isostructural metal-organic frameworks, viz. Co2(m-DOBDC) (m-DOBDC4- = 4,6-dioxo-1,3-benzenedicarboxylate) and Co2(p-DOBDC) (p-DOBDC4- 2,5-dioxo-1,4-benzenedicarboxylate), with increasing loading. Interestingly, C-H bond at electron-rich carbon (C5)...