A5000206639- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Lanthanide and Transition Metal Complexes
- Crystallography and molecular interactions
- Metal-Catalyzed Oxygenation Mechanisms
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal structures of chemical compounds
- Polyoxometalates: Synthesis and Applications
- Organometallic Complex Synthesis and Catalysis
- Vanadium and Halogenation Chemistry
- Synthesis and biological activity
- Synthesis and Characterization of Heterocyclic Compounds
- Organometallic Compounds Synthesis and Characterization
- Organic Electronics and Photovoltaics
- Porphyrin and Phthalocyanine Chemistry
- Electron Spin Resonance Studies
- Inorganic Fluorides and Related Compounds
- Molecular Junctions and Nanostructures
- Fullerene Chemistry and Applications
- Organic and Molecular Conductors Research
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Chemical Synthesis and Reactions
Kanazawa University
2019-2024
Kwansei Gakuin University
2015-2020
Yale University
2019
Hyogo University
2018
Sanda University
2018
Okayama University of Science
2009-2016
Yamagata University
2016
Okayama University
2009-2013
Science and Technology on Surface Physics and Chemistry Laboratory
2010
Rikkyo University
1986
Dicopper-substituted polyoxovanadate [Cu2V16O44(NO3)]5− (Cu2V16) was synthesized through the reaction of [Cu2V8O24]4− and [V4O12]4− in presence nitrate salt. From single crystal X-ray analysis, Cu2V16 exhibited same helical structure as that nitrate-incorporated polyoxovanadate, [V18O46(NO3)]5− (V18). Both complexes had framework with guest anion are considered to be substituted isomers for each other by replacing two Cu2+ ions [VO]2+ ions. The incorporated showed short long N–O bond lengths...
Flexible picene thin film field-effect transistors (FETs) have been fabricated with parylene gate dielectric on polyethylene terephthalate substrates. The FETs show p-channel output/transfer characteristics and the mobility μ reaches ∼1 cm2 V−1 s−1 in vacuum. FET shows a clear O2 gas sensing effect negligible hysteresis transfer curves, indicating possible application of transistor as selective sensor. Furthermore, it has found that can eliminate reduction on-state drain current caused by...
A new cobalt(<sc>ii</sc>) field-induced single-molecule magnet with an ideal trigonal antiprismatic geometry was prepared taking advantage of structure-directing intermolecular hydrogen-bonds.
Three tetracoordinated cobalt(ii) complexes with a series of unsymmetrical bidentate ligands were synthesized and crystallographically characterized. Although their static magnetic properties are similar, dynamic differ drastically depending indirectly on intermolecular hydrogen-bonding interactions.
Local structure change of the vanadium-oxygen cluster with nitrate at center controls catalytic performance in selective oxidation.
Cobalt(III) complexes with three unsymmetrical bidentate ligands containing a noncoordinating N–H bond and phenolate-O donor as hydrogen-bond acceptor, respectively, were prepared characterized. 1H NMR spectroscopy indicated that all the tris-chelate Co(III) favor mer configuration in solution. [Co(Hthp)3] [Co(Himn)3] also possess crystals (Hthp– = 2-(1,4,5,6-tetrahydropyrimidin-2-yl)phenolate, Himn– 2-(2-imidazolinyl)phenolate). On other hand, [Co(Himl)3] takes fac crystal (Himl–...
X-ray structures of the halo-substituted complexes [FeIII (5-X-salMeen)2 ]ClO4 (X=F, Cl, Br, I) [salMeen=N-methyl-N-(2-aminoethyl)salicylaldiminate]at RT have revealed presence two discrete HS complex cations in crystallographic asymmetric unit with perchlorate counter ions linking them by N-Hamine ⋅⋅⋅Operchlorate interactions. At 90 K, are distinctly and LS, a rare observation this coexistence FeIII -salRen (R=alkyl) spin-crossover (SCO) system. both temperatures, crystal packing shows...
New ruthenium(II or III) complexes with general formula [Ru(O-N)(bpy)2]n+ (O-N = unsymmetrical bidentate phenolate ligand; bpy 2,2′-bipyridine) were synthesized, and their crystal structures electrochemical properties characterized. RuII 2-(2-imidazolinyl)phenolate (Himn–) 2-(1,4,5,6-tetrahydropyrimidin-2-yl)phenolate (Hthp–) could be deprotonated by addition of excess KOtBu, although the species easily reprotonated exposure to air. Unlike these complexes, RuIII analogs showed interesting...
Interest in metal oxide semiconductors for energy processes has increased due to their prominent roles photocatalysis, electrical storage, and conversion. However, an understanding of the thermochemistry electron transfer (ET) reactions these systems lagged behind photophysical studies. This report investigates ET equilibria between reduced forms well-characterized, ligated ZnO TiO2 nanoparticles (NPs) suspended toluene. Multiple electrons were added each type NP, either photochemically or...
The correlation between magnetic relaxation dynamics and the alignment of single-ion magnets (SIMs) in a crystal was investigated using four analogous cobalt(ii) complexes with unique hydrogen-bond networks. hydrogen-bonding interactions crystals resulted relatively short intermolecular Co⋯Co distance, which led to non-zero coupling. All distance shorter than 6.5 Å exhibited zero-field slow as weak split ground ±Ms levels suppressed quantum tunneling magnetization (QTM). In particular,...
Copper(II) complexes with 2,3,4-trimethoxybenzoic acid (H234-tmbz) and 2,4,6-trimethoxybenzoic (H246-tmbz), [Cu2(234-tmbz)4(H2O)2] (6) [Cu(246-tmbz)2(µ-H2O)2(H2O)2]n (7), were synthesized characterized by elemental analysis, infrared UV-vis spectra temperature dependence of magnetic susceptibilities (1.9–300 K). The X-ray crystal structures revealed that the former 6 is a dinuclear cluster having syn-syn-bridged Cu2(µ-234-tmbz)4 core Cu···Cu separation 2.6009(7) Å, while latter 7...
Organometallic–polyoxometalate (POM) complexes form a unique class of molecular organometallic oxides characterized by the dynamic behavior cations. Herein, we investigated reactivity Cp*Ir-octatungstate clusters (where Cp* represents pentamethylcyclopentadienyl, C5Me5–) with Werner-type transition-metal aquo The addition Ag+, Co2+, Ni2+, and M3+ (M = Cr, Fe, or In) cations to aqueous solution resulted in formation [{Ag(OH2)2}2{Cp*Ir(OH2)}2{Cp*IrW3O12(OH)}2(WO2)2] (1),...
Octahedral nickel(II) complexes are among the simplest systems that exhibit zero-field splitting by having two unpaired electrons. For purpose of clarifying relationship between structure and in a low-symmetric system, distorted octahedral were prepared with tetradentate ligand, 2-[bis(2-methoxyethyl)aminomethyl]-4-nitrophenolate(1−) [(onp)−]. The complex [Ni(onp)(dmso)(H2O)][BPh4]·2dmso (1) (dmso = dimethyl sulfoxide) was characterized as bulk sample IR, elemental analysis, mass...
The magnetostructural correlation of the hexakis-dmso cobalt(<sc>ii</sc>) complex, [Co(dmso)<sub>6</sub>](BPh<sub>4</sub>)<sub>2</sub> (dmso: dimethylsulfoxide), was investigated by single-crystal X-ray diffraction study and magnetic measurements.
Only a limited number of multinucleating ligands can stably maintain multinuclear metal structures in aqueous solutions. In this study, water-soluble dinucleating ligand, 2,6-bis{[N-(carboxylatomethyl)-N-methyl-amino]methyl}-4-methylphenolate ((sym-cmp)3-), was prepared and its copper(II) complexes were structurally characterized. Using the single-crystal X-ray diffraction method, their dimer-of-dimers type defect cubane tetranuclear characterized for [Cu4(sym-cmp)2Cl2(H2O)2]...
Tetranuclear MnII2MnIII2 complexes with 1,3-bis(5-bromo-3-metoxysalicylidenaminomethyl)-2-propanol (H3bmsap) and 1,3-bis(5-chloro-3-methoxysalicylidenaminomethyl)-2-propanol (H3cmsap), [Mn4(bmsap)2(CH3CO2)3(CH3O)] (3) [Mn4(cmsap)2(CH3CO2)3(CH3O)] (4), were synthesized characterized by elemental analysis, infrared diffused reflectance spectra variable-temperature magnetic susceptibility measurements in the 2–300 K range. The crystal structures of 3 4 revealed a Y-shaped tetranuclear manganese...
Copper(II) 3,4,5-trimethoxybenzoate, [Cu 2 (3,4,5-(CH 3 O) C 6 H CO ) 4 (CH OH) ]·2DMF, was prepared and characterized by elemental analysis, infrared UV-vis spectra temperature dependence of magnetic susceptibilities (4.5—300 K). The crystal structure determined the single-crystal X-ray diffraction method. It crystallizes in triclinic space group P 1 ( _ with a = 8.2110(13) Å, b 13.181(2) c 13.409(2) α 97.967(3)°, β 102.378(3)°, γ 105.009(3)°, V 1339.8(4) Å , D x 1.465 g/cm Z 1. R [ I > 2σ(...