A5048885740- Radioactive element chemistry and processing
- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Chemical Synthesis and Characterization
- Lanthanide and Transition Metal Complexes
- Extraction and Separation Processes
- Magnetism in coordination complexes
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Solar and Space Plasma Dynamics
- Particle accelerators and beam dynamics
- Crystallography and molecular interactions
- Analytical chemistry methods development
- Metal complexes synthesis and properties
- Glass properties and applications
- Plasma Applications and Diagnostics
- Metal-Catalyzed Oxygenation Mechanisms
- Plasma Diagnostics and Applications
- Nuclear Physics and Applications
- Catalytic C–H Functionalization Methods
- Iterative Learning Control Systems
- Laser-induced spectroscopy and plasma
- Organometallic Complex Synthesis and Catalysis
- Advanced Chemical Physics Studies
- Catalytic Cross-Coupling Reactions
Japan Atomic Energy Agency
2016-2025
Osaka University
2024-2025
Toneyama National Hospital
2024
Japan Research Institute
2020
Hiroshima University
2013-2016
Tokyo Institute of Technology
2010-2012
Japan Aerospace Exploration Agency
2011
Imagineering (Japan)
2009-2010
Kyoto University
2003-2007
Nagoya University of Foreign Studies
2007
The cyclization reaction of various 2-ethynylanilines, which were easily synthesized from 2-haloanilines by the palladium-catalyzed with terminal alkynes, tetrabutylammonium fluoride (TBAF) to yield 2-substituted indoles proceeded at refluxing or room temperature in THF excellent yields without affecting bromo, chloro, cyano, ethoxycarbonyl, and ethynyl groups.
We propose microwave-enhanced spark-induced breakdown spectroscopy with the same measurement and analysis processes as in laser-induced spectroscopy, but a different plasma generation mechanism. The size lifetime of generated can contribute to increased accuracy expand its applicability industrial measurement, such an exhaust gas analyzer for automobile engine development regulation, which has been hard operate by laser at engineering evaluation site. use microwaves this application helps...
We performed a theoretical investigation for the selectivity of Eu(III)/Am(III) ions depending on donor atoms by means all-electron ZORA-DFT calculation. estimated their as relative stability in complex formation reaction. The B2PLYP functional reproduced experimental which S- and N-donor ligands favor Am(III) ion, but O-donor ligand favors Eu(III) ion. Mulliken's bond overlap population analysis revealed that contribution f orbital to bonding was small or zero Eu complex, whereas it large...
Using containerless processing with an aerodynamic levitation furnace, LaO 3/2 – TiO 2 binary glasses were synthesized in bulk form. Glass‐forming region was found the vicinity of eutectic point, which is approximately 29.5% and 70.5% molar ratio. The glass transition temperature T g crystallization onset x obtained determined by differential scanning calorimetry. thermal stability evaluated Δ (= − ). Our experimental results compared phase diagram system. Glass compositions highest...
Abstract TiO 2 ‐based high‐refractive‐index glasses without any network former oxides were fabricated by containerless processing in an aerodynamic levitation furnace. The glass‐forming region of a BaO‐LaO 3/2 ‐TiO ternary system was determined. Moreover, the glass transition and crystallization temperatures (La 1− x Ba ) 4 Ti 9 O 24 LaO ‐ M ( = Ga, Y, Gd, Hf, W, Zn Ge, Nb, Ta, Bi, Ba) obtained. Finally, refractive index dispersion Gd) also investigated. results indicate that these are...
Relativistic density functional calculations were applied to study the separation behaviors of Am(iii) ion from Eu(iii) by diglycolamide (DGA) and nitrilotriacetamide (NTA) ligands in order understand difference mechanism their reagents. The complexation reaction was modeled on basis previous experimental studies. calculated energies based stabilization complex formation at ZORA-B2PLYP/SARC level predicted that DGA reagent preferably coordinated when compared with ion. In contrast, NTA...
A new plasma generation technique that uses spark discharge and microwaves is proposed. The generates a small source enhanced by microwave power, increasing its volume brightness. Using this technique, was produced successfully, even at pressure of 2.0 MPa. As the generated, emission intensity OH radicals increased to 300 times greater than with alone. To apply as ignition in gasoline engine, prototype plug developed. contained miniature antenna could generate pressures up 1.0 Combustion...
The reaction of N-protected 2-alkynylanilines with electron-deficient alkenes in the presence a palladium(I1) catalyst and copper dichloride acetonitrile gave 2-substituted 3-alkenylindoles.We have reported synthesis',2 indoles by basic cyclization ethyl N-(2-alkyny1phenyl)carbamates which were produced palladium(0)-catalyzed cross-coupling 2bromoanilines terminal alkynes.On other hand, palladium(I1)-catalyzed Zalkynylaniline derivatives to 2substituted has also been reported."The indole is...
The L–H transition in a helical-axis heliotron, Heliotron J, is investigated. For electron cyclotron heating (ECH), neutral beam injection (NBI) and ECH + NBI combination plasmas, the confinement quality of H-mode examined with an emphasis on its magnetic configuration dependence. vacuum edge rotational transform, ι(a)/2π, chosen as label for where ι/2π transform average plasma minor radius metres. experimental ι(a)/2π dependence enhancement factor over L-mode reveals that specific...
Ten Eu and ten Np benchmark complexes were calculated by relativistic all-electron DFT. The B2PLYP functional showed good correlation with the Mössbauer experiment for both systems.
We elucidated the separation mechanism between Am(III) and Cm(III) ions by using two different types of diamide ligands, diglycolamide (DGA) alkylated amine (ADAAM), means density functional theory technique electron analysis. The molecular geometries formation reactions metal-ligand complexes were modeled [M(DGA)3]3+ [M(ADAAM)(NO3)3(H2O)]. successfully reproduced selectivity over with DGA ADAAM. Furthermore, we analyzed bonding properties metal ion diamide-type ligands model complexes,...
Initial ohmic heating experiments in JT-60 were performed for a three month period of April-June 1985. A maximum plasma current 1.6 MA was obtained both divertor and limiter discharges. Low-q discharges qeff=2.5 high density 4.8*1019 m-3 line-averaged the configuration. In radiated loss from main can be kept at 20-30% input.
Abstract Spin-crossover (SCO) behaviors of Fe(II)-assembled complexes [Fe(NCX)2(bpa)2]n (X = S, Se, and BH3; bpa: 1,2-bis(4-pyridyl)ethane) were explained by using density functional theory (DFT) calculations. The TPSSh/TZVPP method gave accurate energies to all electrons reasonable spin-transition temperatures. Further, we revealed that the occurrence SCO is determined carefully controlling local structure around iron atom.
Scalar-relativistic density functional calculations were applied to the complexation of Eu(III) and Am(III) ions with alkyldithiophosphinic acid (S-donor) alkylphosphinic (O-donor) from viewpoint bonding nature valence orbitals a metal ion. Two four conformers for S-donor O-donor complexes, respectively, optimized at ZORA-BP86 level. The stabilization energies by complex formation between ligands toward hydrated estimated ZORA-B2PLYP level; these reproduced experimental Am/Eu selectivities,...
We applied density functional theory calculations to ruthenium-nitrosyl complexes, which are known exist in high-level radioactive waste generating during reprocessing of spent nuclear fuel, give a theoretical correlation between 99Ru Mössbauer spectroscopic parameters and ligand field strength for the first time. The structures series [Ru(NO)L5] (L = Br-, Cl-, NH3, CN-), were modeled based on corresponding single-crystal X-ray coordinates. comparisons geometries total energies different...
An overview of the research and development imaging bolometers giving a perspective on applicability this diagnostic to fusion reactor is presented. Traditionally total power lost from high temperature, magnetically confined plasma through radiation neutral particles has been measured using one dimensional arrays resistive bolometers. The large number signal wires associated with these poses hazards not only at vacuum interface, but also in loss electrical contacts that observed presence...
Abstract Fe(II) spin-crossover (SCO) phenomenon for fifteen sets of coordination polymers possessing a trans-[Fe(NCS)2(pyridine)4] unit is investigated by means density functional calculations. Constrained geometry optimization applied to Fe(NCS)2(pyridine)4 models fixing the dihedral angle between Fe-NCS axis and pyridine plane. Zero-point corrected energy difference HS LS, ΔE0HL, TPSSh single point calculation reproduces successfully experimental SCO-on SCO-off behaviors most compounds. In...