- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Silicone and Siloxane Chemistry
- Magnetism in coordination complexes
- Conducting polymers and applications
- Organic and Molecular Conductors Research
- Neutrino Physics Research
- Photochromic and Fluorescence Chemistry
- Advanced Sensor and Energy Harvesting Materials
- Organometallic Complex Synthesis and Catalysis
- Polyoxometalates: Synthesis and Applications
- Metalloenzymes and iron-sulfur proteins
- Synthesis and Properties of Aromatic Compounds
- Synthesis and properties of polymers
- Molecular Junctions and Nanostructures
- Chemical Synthesis and Characterization
- Synthesis and characterization of novel inorganic/organometallic compounds
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CO2 Reduction Techniques and Catalysts
- Catalysis and Oxidation Reactions
- Catalytic Processes in Materials Science
- Dark Matter and Cosmic Phenomena
- Copper-based nanomaterials and applications
Chiba University
2019-2025
Tokyo University of Science
2013-2022
Hiroshima University
2017-2021
The University of Tokyo
2011-2020
Miyagi University of Education
2020
University of Fukui
2020
Tohoku University
2020
Graduate School USA
2016-2020
Bunkyo University
2012-2016
Waseda University
2015
The anion-doped poly(alkoxyselenophene) solutions were drop-cast onto a glass substrate, resulting in the formation of metal-like luster films.
The hybrid antifogging materials poly(3-aminopropyl)silsesquioxane (PAPS) and poly(3-(2-aminoethylaminopropyl)silsesquioxane) (PAEAPS) were prepared by sol–gel reactions that are autocatalyzed the amine moieties of monomers. PAPS PAEAPS show good film-forming abilities, films obtained found to be uniform pinhole-free. X-ray diffraction analysis indicated formation ladder-like structures. exhibit high water uptakes 34 42%, which 1.2 1.5 times typical polymer poly(vinyl alcohol) (PVA),...
Phenyl(trimethylsilylethynyl)iodonium and tert-butyldimethylsilylethynyl(phenyl)iodonium triflates were applied to alkynylation of benzotriazole. Treatment the silylethynyliodonium with potassium salt benzotriazole ion in (t)BuOH CH(2)Cl(2) gave 2-(trimethylsilylethynyl)-2H-1,2,3-benzotriazole 2-(tert-butyldimethylsilylethynyl)-2H-1,2,3-benzotriazole 74% 76% yields, respectively. The regioisomers, 1-silylethynyl-1H-1,2,3-benzotriazole derivatives, minor. In both cases silyl-substitued...
Previously, we synthesized π-conjugated trinuclear metalladithiolene complexes based on benzenehexathiol (J. Chem. Soc., Dalton Trans.1998, 2651; Trans.2009, 1939; Inorg. Chem.2011, 50, 6856). Here report with a triphenylene backbone. A reaction triphenylenehexathiol and group 9 metal precursors in the presence of triethylamine gives rise to 9-11. The planar structure 11 is determined using single crystal X-ray diffraction analysis. ligand-to-metal charge transfer bands 9-11 move longer...
This Perspective addresses our recent studies relating to metalladithiolenes and their cluster complexes that exhibit peculiar electronic communication in mixed-valent (MV) states. Chapter 1 provides an introduction for the Perspective. 2 enumerates a series of phenylene-annulated π-conjugated trinuclear with intense MV 3 treats heterometal synthesized by integrating zero-valent metal carbonyls on mononuclear metalladithiolenes, taking advantage coordination unsaturation latter. In field...
Redox potential inversion was observed during the two-electron (2e−) reduction of two novel heterometal trinuclear complexes, [Co2Mo(η5-C5Me5)2(S2C6H4)2(CO)2] (1) and [Rh2Mo(η5-C5Me5)2(S2C6H4)2(CO)2] (2), metalladithiolenes which were found to communicate electronically via a Mo(CO)2 moiety through Co/Rh–Mo bonds. The redox properties structural changes associated with each complex investigated. 1 showed both two-step one-electron (1e−) reductions normal-order difference one-step...
One strategy to improve the performance of electric double-layer capacitors (EDLCs) is changing current collector material. In this study, a three-dimensional porous comprising stainless-steel fibers fabricated using relatively simple method. Capacitor properties EDLC unique are characterized by cyclic voltammetry and charge-discharge tests. The voltammograms develop more butterfly shape an increased specific capacity at higher electrolyte concentrations. It shows reversible potential...
New π-conjugated trinuclear dithiolenes with group 8 (6, RuII) and 10 (7 8, NiII PtII) metals were synthesized. Compounds 6 7 exhibited intense electronic communication through the phenylene bridge among three dithiolene moieties during oxidation of metalladithiolene rings, which has not been confirmed in analogous family 9 metals, 1–5. Compound an absorption band across visible near-IR regions, was assigned as a charge transfer to diimine red-shifted broadened compared corresponding...
In the field of organic/inorganic hybrid polymers with application as thermal insulating materials, ethylene-bridged polysilsesquioxane films are promising materials enhanced properties due to presence intramolecular void spaces in their frameworks. With aim increasing content further enhance property resulting material, this paper describes hydrosilylation reaction hydrodimethyl-silylated oligomethylsilsesquioxane (MSQ-SiH) and octavinyl polyhedral oligomeric silsesquioxane (Vinyl-POSS)...
π-Conjugated trinuclear iridium and cobalt dithiolenes undergo multiple metal-metal bond formation with Co(2)(CO)(8) Fe(CO)(5), giving rise to Ir(3)Co(6) nonanuclear Co(3)Fe(3) hexanuclear cluster complexes 5 6, respectively. retains a planar framework intense π conjugation across the three iridadithiolenes phenylene bridge, which results in electronic communication among Co(2)(CO)(5) units reduced mixed-valent states.
The addition of carbon monoxide to the ruthenium center [(η(6) -C6 Me6 )Ru(S2 C6 H4 )] (1) has been investigated. )Ru(CO)(S2 (2) was obtained by CO gas 1 in both solution and solid states. reproduced treating 2 with an oxidant. A 1/polysiloxane self-standing hybrid film also prepared showed a dramatic color change upon transformation polysiloxane film.
Ethylene-bridged polysilsesquioxane/hollow silica particle hybrid films were prepared by the sol–gel reaction. The film containing hollow particles exhibited good thermal insulation properties and stability.
Although controlling the luster color of molecules that exhibit metallic using organic materials is highly desirable, achieving different colors requires substantial changes to original molecular structure or an external stimulus. Structural alter electronic state, resulting in notable physical properties beyond color. Color change prompted by stimuli energy and subject limitations. Therefore, altering a material's without modifying its state challenging. Herein, we report method for...
POSS derivatives were synthesized by the dehydrogenative reaction of octahydrosilsesquioxane with alcohols. The 2-methacryloyloxyethanol, 1-methacryloyloxy-2-propanol, and diphenyl methanol provided corresponding octaalkoxylated derivatives. ethylene glycol silica gel, while 2,3-butanediol or pinacol polymers oligomers, respectively. product 2,2-butanediol was spin-coated on a silicon wafer heated to provide coating film pencil-hardness 2H.
The achievement of molecular orientation control by rubbing and pressing poly(3-alkylthiophene)s is a powerful technique to improve the performance organic electronic devices. We report here that blackish-brown 3-methoxythiophene oligomer powders yield layer tablet samples with gold tones, respectively. Specular reflectivity, colorimetric, X-ray diffraction measurements reveal this tone caused an increase in ratio edge-on lamellar crystallites face-on ones, which promoted rubbing/pressing....
Solution-cast coating films of perchlorate-doped oligo(3-methoxythiophene) exhibited a gold-like luster similar to that metallic gold despite the involvement no metals. However, development mechanism remains ambiguous. To understand mechanism, we performed scanning electron microscopic analysis, variable-angle spectral reflectance measurements, and ellipsometry measurements on ClO4−-doped cast film with luster. The results revealed lustrous color was not induced by submicron-sized regular...