Alan M. Bond、Robin J. H. Clark、David Humphrey 等 6 位作者1998-01-01Journal of the Chemical Society Dalton Transactions
A range of oxo-centred, carboxylate-bridged triiron complexes of general formula [Fe3O(O2CMe)6L3]X (L = py, 3-H2Npy, 4-H2Npy, 3-NCpy, 4-NCpy or 4-CH2CHpy, X = ClO4–) and [Fe3O(O2CR)6(py)3]X (R = But, Ph, CH2Cl, CCl3, CH2CN or 4-NO2C6H4, X = ClO4– or NO3–) has been synthesized, some for the first time. The [Fe3O(O2CPh)…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Alain Braud、Sylvain Girard、Jean‐Louis Doualan 等 4 位作者1998-01-01IEEE Journal of Quantum Electronics
Fluorescence dynamics of the /sup 3/H/sub 4/ and /sup 3/F/sub 4/ energy levels of Tm/sup 3+/ ions in LiYF/sub 4/ single crystals codoped with Tb/sup 3+/ or Eu/sup 3+/ ions were experimentally investigated and confronted with classical energy-transfer models: direct cross-relaxation-type energy transfers between donor…
Luminescence Properties of Advanced MaterialsSolid State Laser TechnologiesOptical properties and cooling technologies in crystalline materials
T. Taut、R. Kleeberg、Jörg Bergmann1998-01-01OpenAlex
The new Rietveld program BGMN is introduced with its unique features especially useful for fully automatic quantitative phase analysis. Some examples including layer silicates are presented.
Geological and Geochemical AnalysisGeochemistry and Geologic MappingX-ray Diffraction in Crystallography
A. Vincent、G. Lormand、P. Lamagnère 等 7 位作者1998-01-01OpenAlex
A method of calculating fatigue life of bearing steels, which accounts for the material fatigue process in relation with its microstructure, is required for optimizing these materials. Such a new approach is presented for bearing steels submitted to rolling contact fatigue, for which inclusions are well known to play…
Gear and Bearing Dynamics AnalysisAdhesion, Friction, and Surface InteractionsMetal Alloys Wear and Properties
S.R. Korupoju、P.S. Zacharias1998-01-01Chemical Communications
3 + 3 Condensed optically active hexaaza triphenolic macrocyles 1 and 2 are synthesised and characterised; molecular and close packing structures of macrocycle 2 are discussed.
Supramolecular Chemistry and ComplexesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Yasuhiko Shirota、Kazuyuki Moriwaki、Satoru Yoshikawa 等 5 位作者1998-01-01Journal of Materials Chemistry
We have created photochromic amorphous molecular materials containing an azobenzene chromophore, 4-[di(biphenyl-4-yl)amino]azobenzene and 4,4′-bis[bis(4′-tert-butylbiphenyl-4-yl)amino]azobenzene (t-BuBBAB), which readily form amorphous glasses above room temperature and exhibit photochromism in their amorphous films.…
Liquid Crystal Research AdvancementsPhotochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistry
L. M. Blinov1998-01-01Liquid Crystals
A brief review is presented of theoretical predictions and experimental observations concerning polar (pyroelectric, ferroelectric and antiferroelectric) achiral mesomorphic phases.
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsPlant Reproductive Biology
Richard Villanneau、Anna Proust、Françis Robert1998-01-01Chemical Communications
In methanol, the defect nitrosylpolyoxomolybdate [Mo5O13(OMe)4(NO)]3– reacts with Ag+ to give the complex [Ag2{Mo5O13(OMe)4(NO)}2]4– which displays attractive interactions between the two square-planar closed-shell AgI cations.
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsNanocluster Synthesis and Applications
Nagao Kobayashi1998-01-01Chemical Communications
Optically active ‘adjacent’ type non-centrosymmetrically substituted phthalocyanines (Pcs) and benzo-substituted Pcs having π-systems with C2v symmetry have been synthesized in high yields in a mixed condensation using bisphthalonitriles (which do not racemize under general Pc formation conditions) and a second phthal…
Molecular Sensors and Ion DetectionSupramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine Chemistry
Loı̈c J. Charbonnière、Christian Balsiger、Kurt Schenk 等 4 位作者1998-01-01Journal of the Chemical Society Dalton Transactions
Spectrophotometric pKa determination for p-tert-butylcalix[5]arene (H5L) in acetonitrile (pKa1 = 11.5 ± 0.7, pKa2 = 15.4 ± 1.0 at 298 K) evidenced both intra- and inter-molecular stabilisation of the deprotonated forms. Dimeric complexes [Ln2(H2L)2(dmso)4] (Ln = EuIII, GdIII, or TbIII; dmso = dimethyl sulfoxide) were…
Supramolecular Chemistry and ComplexesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Ziming Sun、David N. Hendrickson、Ziming Sun 等 6 位作者1998-01-01Chemical Communications
The salts of the tetranuclear vanadium(III) ions [V4O2(O2- CEt)7(L–L)2]z (L–L = bpy, z = +1; L–L = pic–, z = –1) with a V4 butterfly topology and a S = 3 ground state have been found to exhibit out-of-phase ac susceptibility signals, a signature of single-molecule magnets.
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal Complexes
Teruyuki Nakato、Mutsuko Kimura、Shinichi Nakata 等 4 位作者1998-01-01Langmuir
Cs 2.5 H 0.5 PW 12 O 40, a hydrogen cesium salt of dodecatungstophosphoric acid, exhibited a high catalytic activity for hydrolysis of ethyl acetate in large excess water. Adsorption of water demonstrated that interactions between Cs 2.5 H 0.5 PW 12 O 40 and water are weak. This nature and the strong acidity are possi…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Characterization
Sharon K. Pulfer、James M. Gallo1998-01-01Journal of drug targeting
A novel cationic delivery system composed of magnetic aminodextran microspheres (MADM) 1-2 microm in diameter was evaluated along with neutral magnetic dextran microspheres (MDM) for their ability to target intracerebral rat glioma-2 (RG-2) tumors in vivo. The tissue distribution of the microspheres was determined fol…
Nanoparticle-Based Drug DeliveryHydrogels: synthesis, properties, applicationsAdvanced Drug Delivery Systems
M. A. Malik、Macpherson M. Zulu、Paul O’Brien 等 4 位作者1998-01-01Journal of Materials Chemistry
TOPO (tri-n-octylphosphine oxide)-capped ZnSe (in the form of close to mono-dispersed nanoparticles) has been prepared by a single source route using ethyl(diethyldiselenocarbamato)zinc(ii) as a precursor. The nanoparticles obtained show quantum size effects in their optical spectra and exhibit near band-edge luminesc…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications
Kei Murakoshi、Hiroji Hosokawa、Naoko Tanaka 等 9 位作者1998-01-01Chemical Communications
Pentafluorothiophenol, thiophenol, 1-decanethiol, 1-hexanethiol, benzoic acid and cyanoacetic acid, which are confirmed to bind to the surface of ZnS nanocrystallites, induce phase transition of ZnS nanocrystallites from the hexagonal to the cubic phase, with retention of the crystalline size of 3 nm at ambient temper…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Filmsnanoparticles nucleation surface interactions
Yves Fre、Relouis Danicher、Philippe Gramain1998-01-01European Polymer Journal
The preparation of polyurethane capsules by interfacial reaction of di- and multiisocyanates (dissolved in toluene) and different di- and triols (dissolved in the aqueous phase) is investigated. Particular attention was paid to obtaining high yields and good mechanical resistance. The experimental conditions were chos…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer composites and self-healing
X. Wang、Seiji Kumagai、Noboru Yoshimura1998-01-01IEEE Transactions on Dielectrics and Electrical Insulation
Acid rain causes one of the more severe environmental contaminants, and there is an increasing interest in the degradation of outdoor polymer insulating materials in severe pollution conditions such as acid rain. The performance of high temperature vulcanizing (HTV) silicon rubber insulators in accelerated aging of ar…
High voltage insulation and dielectric phenomenaSmart Materials for ConstructionThermal Analysis in Power Transmission
Juraj Bujdák、M. Janek、Jana Madejová 等 4 位作者1998-01-01Journal of the Chemical Society Faraday Transactions
Six Na-saturated smectites were isolated from bentonites of various deposits. Their H-forms were prepared using H–OH–H resins. The interaction of methylene blue (MB) (0.05 mmol g-1) with Na-saturated untreated and H-autotransformed clay samples was investigated by the VIS spectroscopy of their dispersions. The spectra…
Porphyrin and Phthalocyanine ChemistryClay minerals and soil interactionsIron oxide chemistry and applications
John A. Rotole、Peter M. A. Sherwood1998-01-01Surface Science Spectra
The XPS spectra of corrundum were collected with a VSW HA150 using monochromatic Al Kα x-radiation. Monochromatic radiation provides a distinct clarity to the peak structure in the valence band of corrundrum due to the absence of interfering x-ray satellites from the intense O 2s region. Variations in the intensities…
X-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy TechniquesX-ray Diffraction in Crystallography
Alexandre G. Brolo、D. E. Irish、G. Szymański 等 4 位作者1998-01-01Langmuir
The dependence of the surface-enhanced Raman scattering (SERS) of pyrazine (pz), adsorbed on polycrystalline gold electrodes (“smooth” and rough), on both the surface coverage and morphology was investigated. The morphology of the rough gold electrode was observed by atomic force microscopy (AFM), and the surface cove…
Gold and Silver Nanoparticles Synthesis and ApplicationsElectrochemical Analysis and ApplicationsProtein Interaction Studies and Fluorescence Analysis