A5047756100- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Covalent Organic Framework Applications
- Chemical Synthesis and Characterization
- Crystallography and molecular interactions
- Mesoporous Materials and Catalysis
- Enhanced Oil Recovery Techniques
- Polyoxometalates: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Zeolite Catalysis and Synthesis
- Advanced Fiber Optic Sensors
- Phase Equilibria and Thermodynamics
- CAR-T cell therapy research
- Membrane Separation and Gas Transport
- Head and Neck Cancer Studies
- Immunotherapy and Immune Responses
- Virus-based gene therapy research
- Cancer-related molecular mechanisms research
- Advanced Thermodynamics and Statistical Mechanics
- Catalytic Processes in Materials Science
- Cancer Cells and Metastasis
- High-pressure geophysics and materials
- Barrier Structure and Function Studies
- Carbon Dioxide Capture Technologies
Oita University
2023-2025
Kyoto University
2008-2025
Keiyukai Sapporo Hospital
2023
Tokyo University of Agriculture and Technology
2011-2022
Sapporo Medical University
2010-2022
Graduate School USA
2015-2020
Institute of Engineering
2017
Kanazawa University
2015
Faculty (United Kingdom)
2014
Engineering (Italy)
2014
Crystal-to-crystal transformation from a 3D interpenetrated-type MOF {[Cu(BF4)2(bpy)(H2O)2] (bpy)} (1) to 2D square-grid-type [Cu(BF4)2(bpy)2] (2) (bpy = 4,4'-bipyridine) was observed. It derived dehydration and confirmed by in situ FT-IR, TG, elemental analysis. Moreover, we elucidate the novel expansion/shrinkage dynamic modulation of 2 triggered clathrate formation with gas molecules.
The synthesis, structural changes, and nitrogen gas sorption isotherm of a porous metal−organic framework (PMOF) comprising stacked two-dimensional sheets are reported. This compound easily loses guest molecules shrinks its interlayer distance. guest-free species show unique double-step isotherm. Sorption X-ray analyses have clarified that the first uptake is micropore filling, while second originates from clathrate formation. explains total amount corresponding to about double original void...
Selective synthetic routes to coordination polymers [Cu(bpy)2(OTf)2]n (bpy = 4,4′-bipyridine, OTf trifluoromethanesulfonate) with 2- and 3-dimensionalities of the frameworks were established by properly choosing each different solvent–solution system. They show a quite similar local environment around Cu(II) centers, but these assemble in way leading 2D 3D building-up structures. Although two kinds porous (PCPs) both have flexible frameworks, shows more marked flexibility than 3D, giving...
The crystal structure of [Cu(4,4'-bipyridine) 2(CF 3SO 3) 2] n metal-organic framework (CuBOTf) one-dimensional pore networks after pre-evacuation at 383 K was determined with synchrotron X-ray powder diffraction measurement. Effective nanoporosity the pre-evacuated CuBOTf N 2 adsorption 77 K. experimental H and D isotherms 40 were measured then compared GCMC-simulated using effective nanoporosity. quantum-simulated Feynman-Hibbs potential coincided ones, giving a direct evidence on quantum...
Metal-organic frameworks (MOFs) provide access to structures with nanoscale pores, the size and connectivity of which can be controlled by combining appropriate metals linkers. To date, there have been no reports using MOFs as templates make porous, crystalline metal oxides. Microporous titania replicas were made from MOF template HKUST-1 dehydration, infiltration titanium isopropoxide, subsequent hydrothermal treatment at 200 °C. Etching 1 M aqueous HCl followed 5% H2O2 yielded a replica...
It is important to study the interaction between water molecules and a host structure for understanding adsorption mechanism of metal-organic framework (MOF) materials. The evolution flexible Cu-MOF, {[Cu(bpy)(H2O)2(BF4)2](bpy)} (bpy = 4,4′-bipyridine), upon dehydration rehydration was studied by thermogravimetric analysis (TGA), infrared (IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), adsorption. A nearly reversible structural change observed rehydration....
Lanthanum 1,3,5-benzenetriphosphonate (LBP-II) with layered structure was obtained by a hydrothermal synthesis. LBP-II successfully exfoliated to give nanosheets as confirmed AFM observation. Europium or terbium-doped well their dispersion solutions show photoluminescence.
Nanosheets and nanorolls of a metal-organic framework (MOF) with N-donor type neutral bridging ligands were obtained from layered copper-based MOF by exfoliation treatment in wet process, characterized TEM, SEM, AFM. The thinnest nanosheet indicates monolayer thickness the mother MOF.
Elastic layers: By comparing the gas adsorptivities of N2, O2, CO2, and H2 on two elastic layer-structured metal–organic frameworks (MOFs) with different metal ions, definite differences could be observed in despite their structural similarity. In most cases MOFs, ion has been considered as a connector. However, clearly potential to regulate adsorptivity especially flexible MOFs.
The continuous increase in global energy consumption has caused a considerable CO2 emissions and environmental problems. To address these challenges, adsorbents catalytic materials that can effectively reduce the levels atmosphere should be developed. Metal–organic frameworks (MOFs) have emerged as promising for capture owing to their high surface areas tunable structures. Herein, adsorption properties of MIL-100(Fe) UiO-66(Zr) were investigated. Both MOFs exhibited excellent thermal...
It is important to tune the sorption behavior of metal-organic framework (MOF) materials. Ethanol treatment on hydrated form [Cu(bpy)(2)(BF(4))(2)], which a representative flexible MOF showing fascinating gate phenomenon CO(2) sorption, induces an easier dehydration and significant decrease in pressure. The results IR, X-ray diffraction (XRD), absorption fine structure (XAFS) measurements indicated that water molecules lattice can be removed even at room temperature after ethanol basic 2D...
The gate adsorption mechanism and kinetics of an elastic layer-structured metal–organic framework (ELM), [Cu(bpy)2(BF4)2]n (ELM-11), that shows typical single-step CO2 adsorption/desorption isotherms accompanied with dynamic structural transformation in a wide temperature range were investigated. Adsorption quite small amount on the external surface ELM-11 crystals was observed at pressure just below induced slight change ELM-11. should start occurring outer parts transmit to more inner...
Elastic-layer-structured metal–organic framework-11 (ELM-11) is a soft porous crystal (SPC) with 2D square-grid framework [Cu(BF4)2(bpy)2] (bpy = 4,4′-bipyridine) that has attracted attention as material for CO2 capture and storage because of its gate adsorption properties. Herein, we demonstrate the structure CO2-encapsulated ELM-11 at 100 kPa 273 K can be precisely modeled visualized by our new refinement method, which combines Rietveld analysis in situ synchrotron X-ray powder diffraction...
In human head and neck squamous cell carcinoma (HNSCC), the invasion metastatic properties of cancer cells are promoted by junctional adhesion molecule‑A (JAM‑A) claudin‑1; these epithelial tight junction molecules regulated histone deacetylases (HDACs) transcription factor p63. HDAC expression is reportedly upregulated in HNSCC, inhibitors suppress proliferation initiating proliferative arrest or apoptosis. However, little known anti‑cancer mechanisms HNSCC. Thus, present study, HNSCC...
// Takuya Kakuki 1, 2 , Makoto Kurose 1 Ken-ichi Takano Atsushi Kondoh Kazufumi Obata Kazuaki Nomura Ryo Miyata Yakuto Kaneko Takumi Konno Syunta Takahashi Tsubasa Hatakeyama Takayuki Kohno Tetsuo Himi Takashi Kojima Department of Otolaryngology, Sapporo Medical University School Medicine, 060-8556, Japan Cell Science, Research Institute for Frontier Correspondence to: Kojima, email: ktakashi@sapmed.ac.jp Keywords: JAM-A, head and neck squamous cell carcinoma, β-catenin, p63, GATA-3...
A double-step CO2 sorption by [Cu(4,4'-bpy)2(BF4)2] (ELM-11) was observed during isothermal measurements at 195, 253, 273, and 298 K accompanied interlayer expansion in the layered structure of ELM-11. The first step occurred range relative pressure (P/P0) from 10(-3) to 10(-2). second P/P0 ≈ 0.3 four temperatures. Structural changes ELM-11 process were examined X-ray diffraction (XRD) measurements. structural change for well understood a detailed analysis, as reported previously. XRD...
The supercritical N2, O2, and CH4 adsorption isotherms on a Cu-based metal−organic framework, [Cu(4,4'-bipyridine)2(BF4)2]n, over the temperature range of 196−303 K were measured by gravimetric method. N2 O2 at 196 showed vertical accompanied rectangular hysteresis loop. A method evaluating absolute amount these gases was developed taking into account intermolecular interactions for buoyancy-mediated obviously different from surface-excess mass K. We also obtained temperatures. isosteric...
A flexible one-dimensional copper-based coordination polymer (CP) crystal was synthesized and the structure solved. This CP shows a single step gate adsorption uptake of CO(2) under moderate conditions (268 K ≤ T 303 K, P < 1 atm) irrespective no N(2) at 77 K.
Structural analyses of a flexible 1D MOF [Cu(BF4)2(bpp)2] (bpp =1,3-bis(4-pyridyl)propane) with/without guest molecules were performed by synchrotron powder X-ray diffraction analysis and single crystal structural analysis. The guest-free is composed chains Cu(II) ions bpp ligands which are accumulated to form quasi-2D layers, resulting in quasi-layered compound. has no open pore windows; it, however, latent quasi-hexagonal cavities surrounded six BF4 anions. This shows molecular selective...
A novel Cu-based MOF shows selective molecular accommodation in 1D pores partitioned by movable gates.