A5057730513- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Metal complexes synthesis and properties
- Chemical Synthesis and Reactions
- Vanadium and Halogenation Chemistry
- Crystallography and molecular interactions
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
- Organometallic Compounds Synthesis and Characterization
- Oxidative Organic Chemistry Reactions
- Magnetism in coordination complexes
- Crystal structures of chemical compounds
- Carbon dioxide utilization in catalysis
- Organometallic Complex Synthesis and Catalysis
- Chemical Synthesis and Characterization
- Inorganic and Organometallic Chemistry
- Click Chemistry and Applications
- Covalent Organic Framework Applications
- Synthesis of Organic Compounds
- Mesoporous Materials and Catalysis
- biodegradable polymer synthesis and properties
- Advanced Photocatalysis Techniques
- Synthesis and Characterization of Heterocyclic Compounds
Kanagawa University
2010-2019
Laboratoire de Chimie Moléculaire et Thioorganique
2015
Shizuoka University
2008
Colorado State University
2004
University of Southern California
2003
University of Oregon
1987-1992
Seikei University
1979-1987
Sagami Chemical Research Institute
1979
Two water-soluble, silver(I) complexes showing a wide spectrum of effective antibacterial and antifungal activities, i.e., ([Ag(Hhis)].0.2EtOH)2 (1; H2his = L-histidine) [Ag(Hpyrrld)]2 (3; H2pyrrld (S)-(-)-2-pyrrolidone-5-carboxylic acid) were prepared. In aqueous solution 1 3 present as dimers, whereas in the solid state they polymers. Crystallization by slow evaporation and/or vapor diffusion gave water-insoluble crystals [Ag(Hhis)]n (2) modest antimicrobial activities. The complex is...
As model compounds for silver(I)–protein interactions, silver(I) complexes with three amino-acid ligands, i.e. aspartic acid (H2asp), glycine (Hgly) and asparagine (Hasn), were prepared, characterized by elemental analysis, FTIR, TG/DTA, solution (1H 13C) solid-state (13C 15N) NMR, X-ray crystallography. Such showed a wide spectrum of effective antimicrobial activities against Gram-negative (E. coli, P. aeruginosa) -positive (B. subtilis S. aureus) bacteria, yeasts (C. albicans cerevisiae)...
The syntheses and crystal structures of a series zirconium(IV) hafnium(IV) complexes with Dawson monovacant phosphotungstate [alpha2-P2W17O61](10-) in situ-generated Keggin [alpha-PW11O39](7-), which was obtained by reaction [alpha-PW12O40](3-) Na2CO3, are described. K15H[Zr(alpha2-P2W17O61)2].25H2O (K-1), K16[Hf(alpha2-P2W17O61)2].19H2O (K-2), (Et2NH2)10[Zr(alpha-PW11O39)2].7H2O (Et2NH2-3), (Et2NH2)10[Hf(alpha-PW11O39)2].2H2O (Et2NH2-4), being afforded reactions aqueous solutions...
2-Mercaptonicotinic acid (H2mna = 2-HS(C5H3N)CO2H) gave two types of silver(I) complexes by a reaction with Ag2O suspended in aqueous media; one was water-insoluble, DMSO-soluble yellow powder [Ag(Hmna)]6·4H2O 1 formed under acidic conditions, and the other water-soluble, {Na[Ag(mna)]·H2O}n 2 alkaline conditions. These were interconverted on changing acidity solution. Crystallization vapor diffusion DMSO solutions external acetone pale cubic crystals for plate 2, but structure determination...
The synthesis of a water-soluble anionic silver 2-mercaptonicotinate complex having effective antibacterial and antifungal properties is described. Its structure has been confirmed to be hexameric cluster by an X-ray diffraction analysis mixed Na+/Tris+ salt (Tris+ = tris(hydroxymethyl)methylammonium cation). [Ag(mna)]66- Ag6S6 core overall shape twisted hexagonal cylinder with six sulfur atoms alternating on puckered drum-like surface. Each Ag atom trigonally coordinated one N two S...
Water-soluble, relatively light-stable, chiral and achiral silver(I) complexes {[Ag2(ca)2]}n {[Ag2(ca)2(Hca)2]}n (R- S-Hca = (1R,4S)- (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylic acid, respectively) prepared from the reaction of Ag2O with racemic Hca in 1 ∶ 2 4 molar ratios were characterized by elemental analysis, TG/DTA, FTIR, solution (1H, 13C 109Ag) solid-state (13C) NMR spectroscopy. Crystallography revealed that unique 21 helical polymer zigzag structures...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxoanion-Supported Catalyst Precursors. Synthesis and Characterization of the Iridium(I) Rhodium(I) Precatalysts [(n-C4H9)4N]5Na3[(1,5-COD)M.cntdot.P2W15Nb3O62] (M = Ir, Rh)Matthias Pohl, David K. Lyon, Noritaka Mizuno, Kenji Nomiya, Richard G. FinkeCite this: Inorg. Chem. 1995, 34, 6, 1413–1429Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March...
Abstract The chemistry of Group IV metal ion (Ti , Zr and Hf )‐containing polyoxometalates (POMs) is presented as a sharply focused microreview, introducing an aspect our own research. synthesis, structure, solid/solution state behavior the POMs, which are prepared by reactions various lacunary species POMs with Ti atoms, described in several sections, classified Keggin Dawson POM families. Because ionic radius (0.75 Å), close to that W VI (0.74 atom can fit nicely into mono‐lacunary site...
Reaction of l- and dl-N-acetylmethionine (Hacmet) Ag2O in water at ambient temperature afforded the remarkably light-stable silver complexes {[Ag(l-acmet)]}n (1) {[Ag2(d-acmet)(l-acmet)]}n (2), respectively. The color solids aqueous solutions 1 2 did not change for more than month under air without any shields. light stability these two silver(I) is much higher that methioninate {[Ag2(d-met)(l-met)]}n (3) (Hmet = methionine), S-methyl-l-cysteinate {[Ag(l-mecys)]}n (4), l-cysteinate...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrisubstituted Heteropolytungstates as Soluble Metal-Oxide Analogs. Isolation and Characterization of [(C5Me5)Rh.cntdot.P2W15Nb3O62]7- [(C6H6)Ru.cntdot.P2W15Nb3O62]7-, Including the First Crystal Structure a Dawson-Type Polyoxoanion-Supported Organometallic ComplexMatthias Pohl, Yin Lin, Timothy J. R. Weakley, Kenji Nomiya, Masahiko Kaneko, Heiko Weiner, Richard G. FinkeCite this: Inorg. Chem. 1995, 34, 4, 767–777Publication Date (Print):February...
The preparation and structural characterization of the novel polyoxoanion [(alpha-1,2,3-P(2)W(15)Ti(3)O(62))(4)[mu(3)-Ti(OH)(3)](4)Cl](45-) (1 a; abbreviated to [TiO(6)](16); FW approximately 16 000) which consists four tri-Ti(IV)-1,2,3-substituted alpha-Dawson substructures, Ti(OH)(3) bridging groups, one encapsulated Cl(-) ion, are described. A water-soluble, all-inorganic composition compound tetrameric Ti-O-Ti-bridged anhydride form, Na(x)H(45-x)[1 a].y H(2)O (1; x=16-19, y=60-70), was...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxoanions as soluble metal oxide analogs. 5. Synthesis and characterization of polyoxoanion-supported, atomically dispersed iridium(I), (1,5-COD)Ir.cntdot.P2W15Nb3O628-Richard G. Finke, David K. Lyon, Kenji Nomiya, Sandip Sur, Noritaka MizunoCite this: Inorg. Chem. 1990, 29, 10, 1784–1787Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 1990https://doi.org/10.1021/ic00335a002RIGHTS &...