A5011775907- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Industrial Gas Emission Control
- Crystal structures of chemical compounds
- Metallurgical and Alloy Processes
- Chemical Thermodynamics and Molecular Structure
- Chemical Synthesis and Reactions
- Inorganic and Organometallic Chemistry
- X-ray Spectroscopy and Fluorescence Analysis
- Protein Interaction Studies and Fluorescence Analysis
- Catalytic Processes in Materials Science
- Intermetallics and Advanced Alloy Properties
- Free Radicals and Antioxidants
- Ferroelectric and Piezoelectric Materials
- Advanced materials and composites
- Temporomandibular Joint Disorders
- Advanced Sensor and Energy Harvesting Materials
- Surface Modification and Superhydrophobicity
- Rare-earth and actinide compounds
- Radioactive element chemistry and processing
- Chemical Synthesis and Characterization
- Physics of Superconductivity and Magnetism
Toho University
2019-2025
Aisin (Japan)
2024
Doshisha University
2016
National Institute of Advanced Industrial Science and Technology
2012
Nagoya Institute of Technology
1998-2010
Shizuoka University
2008
Tokyo Metropolitan University
1995-2007
Sophia University
2002
Tokyo University of Agriculture and Technology
2001
Gunma University
1996-1999
The hollow inner spaces of single-wall carbon nanotubes (SWCNTs) can confine various types molecules. Many remarkable phenomena have been observed inside SWCNTs while encapsulating organic molecules (peapods). However, a mixed electronic structure state the surrounding has impeded detailed understanding physical/chemical properties peapods and their device applications. We present single-chirality purification method for that encapsulate A single-chiral (11,10) with diameter 1.44 nm, which...
Magnesium stearate (MgSt), which is often used as a lubricant in the production of solid formulations, has different stearic acid and palmitic contents depending on lot manufacturer, resulting differences mixability lubricating effect. However, there are few reports effect physical properties MgSt samples mixing tablet formation. Additionally, it known that triboelectric components affect mixability. Overmixing formulations can decrease hardness. In this study, with lots manufacturers were...
Active pharmaceutical ingredients (APIs) often exhibit physicochemical problems that one can remedy by various methods (e.g., salt formation, grinding, ordered mixtures, and cocrystal or amorphous formation). Crystallizing salts cocrystals from solutions of an API a coformer is widely used today. In recent years, green chemistry sustainable development goals have been active area research, production method required for reducing the use organic solvents implementing low environmental load....
Abs tract-4,5-Diiodo-, 4,5-dibromo-, and 4,5-dichloro-4' ,5' -ethylenedioxytetrathiafulvalenes (EDO-TTFI 2 , EDO-TTFBr EDO-TTFCl ) were synthesized in moderate to good yields by the two routes.The first route contains reaction of EDO-TTF with LDA, followed quenching halogenated reagents, second consists P(OR) 3 -mediated cross-coupling 4,5-dihalogenated 1,3-dithiole-2-ones 4,5-ethylenedioxy-1,3-dithiole-2-thione.The structures EDO-TTFI determined X-Ray analysis.The radical-cation salts...
Sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy was evaluated for its ability to detect non-conventional C-H▪▪▪S hydrogen bonds in crystals of the sulfur-containing penam antibiotics ampicillin and amoxicillin. The XANES spectra nearly isomorphous trihydrate amoxicillin were very similar, whereas that anhydrate displayed unique features. Single-crystal analyses revealed bond geometries chemical types donors differed between crystal. These observations demonstrate...
Abstract Chlorination, bromination and iodination of bis(methylthio)tetrathiafulvalene (BMT-TTF) produced mainly the dihalogenated products (BMT-TTFX2) with small amounts monohalogenated derivatives (BMT-TTFX). The molecular structures BMT-TTFBr2 BMT-TTFBr2•I3 have been determined, conductivities CT-complexes radical salts derived from BMT-TTFX2 measured.
The crystal forms of active pharmaceutical ingredients must be precisely determined to properly regulate their physical properties. In this study, chlorine K-edge X-ray absorption near-edge structure (XANES) measurements were performed on four different crystals the gastroprokinetic drug mosapride, which contains a covalently bound atom. XANES spectrum mosapride propylene glycol solvate (Mosa-PG) showed unique features compared those other three despite identical chemical structures atoms....
Chlorine K-edge X-ray absorption near-edge spectroscopy (XANES) measurements were performed to characterize the crystal polymorphs of identical active pharmaceutical ingredients (APIs) containing chloride atoms and their amorphous solid dispersions (ASDs). Indomethacin (IMC), which three forms (α, β, γ) have been reported, was used as a model API. The shape XANES spectra unique each IMC crystal. analysis structures revealed that chlorine IMCα form had intermolecular interactions halogen...
Bromine K-edge X-ray absorption near-edge structure (XANES) spectroscopy analyses were used to evaluate the crystals of active pharmaceutical ingredients, eletriptan hydrobromide, dextromethorphan hydrobromide and scopolamine salts solid dispersion hydrobromide. The ingredient (API) could be discriminated based on shape XANES spectra. differences in spectra was ascribable interatomic interactions bromine ions crystal structures. Ratio α-form mixed powders monohydrate quantified by...
Abstract Chlorination and bromination of EDT-TTF produced mainly the dihalogenated products (EDT-TTFCl2 EDT-TTFBr2) with small amounts monohalogenated derivatives. In contrast, iodination afforded monoiodinated derivative as major product, together diiodinated compound. The molecular structures EDT-TTFCl2 EDT-TTFBr2 have been determined, conductivities CT-complexes radical salts new donors reported here measured.
X-Ray structural analyses of the charge-transfer complex (EDT–TTFC12)2·TCNQF4, 2, and radical cation salt EDT–TTFC12·ClO4, 3, revealed an interesting effect chlorine substitution on crystal stacking mode; electrical conductivity 2 is unusually high, although it has a mixed-stacking structure.
Sulfur K-edge X-ray absorption near-edge spectroscopy (XANES) measurements were performed to characterize the crystal polymorphs of active pharmaceutical ingredients (APIs) containing sulfur atoms. Cimetidine (CIM) was used as a model API. Each form CIM has its own XANES spectrum, so we can discriminate by spectrum. The analysis structure revealed that difference in shape spectra ascribable C–S–C bond angle molecules and intermolecular hydrogen bonds, such C–H···S N–H···S, S–S interaction....
Polymorphic crystals of ambroxol, forms I and II, form A ambroxol hydrochloride were characterized with bromine K-edge X-ray absorption near-edge structure (XANES) spectroscopy single-crystal analysis. The XANES spectra had unique shapes depending on the crystal forms. Refined structures revealed different interatomic interactions around atoms, such as C–H…Br N–H…Br hydrogen bonds, Br…O halogen N–H…π interactions. Differences in these weak could affect electronic states bromines, resulting...
A combined desulfurization/denitration (DeSOx/DeNOx) process has recently been proposed by using the powder-particle fluidized bed (PPFB). In process, SOx is removed a fine DeSOx sorbent continuously supplied and NOx reduced to N2 ammonia under catalysis of coarse DeNOx catalyst, fluidization medium particles. By simplest model gas, SO2-NO-Air, in laboratory scale reactor, SO2 NO removals are evaluated this paper testing possible side reactions related NO. Then, investigations extended...