Antony B. Blake、Ekk Sinn、Ahmad Yavari 等 5 位作者1998-01-01Journal of the Chemical Society Dalton Transactions
The crystal structure of [CrIIIxFeIII2–xNiIIO(O2CCH3)6(py)3]·py 1 (x = ca. 0.7, py = pyridine), has been determined at 25 °C. Although the molecule has no crystallographically imposed symmetry, the metal atoms form an almost equilateral triangle, M· · ·M 3.274(3), 3.284(4), 3.281(3) Å, with the O atom less than 0.006…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
T. Courcet、Isabelle Malfant、K.I. Pokhodnia 等 4 位作者1998-01-01New Journal of Chemistry
A convenient one-step reaction for the preparation of 2,3-dihydro-1,4-dithiin, 3, involved in the synthesis of the organic donor compound bis(ethylenedithio)tetraselenafulvalene (BETS), as well as the crystal structure of this donor as determined by X-ray diffraction, are presented. A qualitative insight into the π-el…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchN-Heterocyclic Carbenes in Organic and Inorganic Chemistry
S. Freni、F. Barone、Mattia Puglisi1998-01-01International Journal of Energy Research
In this review article the analysis of the main problems related to the use of NiO as material for cathodes in Molten Carbonate Fuel Cells (MCFC) is reported. Thus, the most significant evidences of the mechanism of NiO dissolution have been reported as well as its correlation with the basicity of the carbonate melt,…
Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
Vincent A. Grillo、Lawrence R. Gahan、Graeme R. Hanson 等 8 位作者1998-01-01Journal of the Chemical Society Dalton Transactions
The complexes [Fe([9]aneN2S)2][ClO4]2, [Fe([9]aneN2S)2][ClO4]3 and [Fe([9]aneNS2)2][ClO4]2 ([9]aneN2S = 1-thia-4,7-diazacyclononane and [9]aneNS2 = 1,4-dithia-7-azacyclononane) have been prepared and the latter two characterised by X-ray crystallography. The Mössbauer spectra (isomer shift/mm s–1, quadrupole splitting…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Yasuharu Noishiki、Yoshihisa YAMANE、Takafumi Okoshi 等 5 位作者1998-01-01Artificial Organs
Preparation of cells and tissues for bioartificial vascular grafts is discussed from the viewpoint of tissue engineering. In general, a neointima is not formed on vascular prostheses except at the anastomotic sites. Graft surfaces do not heal and are covered with fresh thrombi for a long period of time after implantat…
RNA Interference and Gene DeliveryElectrospun Nanofibers in Biomedical ApplicationsSilk-based biomaterials and applications
Alma Hodžić、S. Kalyanasundaram、Adrian Lowe 等 4 位作者1998-01-01Composite Interfaces
The microdroplet technique is usually designed as a fibre embedded in a drop of resin and subsequently pulled out while the drop is being supported by two knife edges, resulting in either debonding of the droplets from the fibres, or breakage of the fibres before debonding can occur. In this study, the microdroplet te…
Surface Modification and SuperhydrophobicityElectronic Packaging and Soldering Technologies3D IC and TSV technologies
Ronny Neumann、Alexander M. Khenkin1998-01-01Chemical Communications
Manganese substituted polyoxometalates (POMs), such as Li12[MnII2ZnW(ZnW9O34)2] were effective catalysts for the oxidation of alkanes to ketones with ozone in an aqueous reaction medium; a green intermediate compound observable by UV–VIS and ESR at –78 °C was postulated to be a reactive manganese ozonide species.
Porphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and ApplicationsOxidative Organic Chemistry Reactions
Annette L. Nolan、Robert C. Burns、Geoffrey A. Lawrance1998-01-01Journal of the Chemical Society Dalton Transactions
Oxidation of [CoIIW12O40]6– by HSO5– in both strong and weak acid solution (the latter in the presence of added [WO4]2–) gives [CoIIIW12O40]5–. The kinetics of oxidation was examined at 15–35 °C over the range [H+] = 0.05–0.625 mol dm–3 and found to exhibit pseudo-zero-order kinetics, –d[CoIIW12O406–]/dt = 2kOX[HSO5–]…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis
Thomas Blunt、P.V. Kotvis、Wilfred T. Tysoe1998-01-01Tribology Transactions
In Part I (1), the concept of “Type I” antiseizure behavior for chlorinated hydrocarbons in extreme-pressure (EP) lubrication of ferrous metals was introduced; interfacial temperature measurements and surface analyses revealed that a solid lubricating layer consisting of ferrous chloride (FeCl2) and carbon prevents se…
Diamond and Carbon-based Materials ResearchLubricants and Their AdditivesAdvanced materials and composites
Michael Ketterle、Wolfgang Kaim、Jan Fiedler1998-01-01Chemical Communications
A hybrid between the Prussian Blue and Creutz–Taube mixed valent species is presented in the form of the bmtz-bridged bis[tetracyanoiron(+2.5)] complex 13– [bmtz = 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine] which exhibits a very large comproportionation constant of 1014 and a delocalised structure, according to UV–VIS–NI…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Mogens Brøndsted Nielsen、N. Thorup、Jan Becher1998-01-01Journal of the Chemical Society Perkin Transactions 1
Using stepwise cyclization reactions followed by an intramolecular coupling, the criss-cross overlapped tetrathiafulvalenophane 8 was readily prepared. The structure of the cis,cis isomer was elucidated by X-ray crystallography which revealed a host–guest complex with chloroform. This electron donor was used for the s…
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistryFullerene Chemistry and Applications
Richard A. Bissell、N. Boden、Richard J. Bushby 等 9 位作者1998-01-01Chemical Communications
A synthesis has been developed for both calamitic and discotic mesogens based on the bis(phenylenedithio-TTF) (BPhDT-TTF) nucleus.
Magnetism in coordination complexesCrystallography and molecular interactionsOrganic and Molecular Conductors Research
Muthusamy Eswaramoorthy1998-01-01Chemical Communications
Copper(II) acetate dimer and [MnII(bipy)2]2+ encapsulated in cubic Al-MCM-48 show high catalytic activity in the oxidation of phenol to catechol by oxygen activation, and of styrene to styrene oxide by singlet oxygen, respectively.
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
Giuseppe Buemi、Felice Zuccarello、Ponnambalam Venuvanalingam 等 5 位作者1998-01-01Journal of the Chemical Society Faraday Transactions
Formazan and 3-nitroformazan have been investigated at abinitio level (MP2/6-31G** and B3LYP/6-31G**) in all their possible conformations, for studying the various possibilities of intramolecular hydrogen bonding formation. The trans-syn-s-cis (TSSC), known also as yellowform, has been found to be the most stable conf…
Photochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistrybioluminescence and chemiluminescence research
Yasuhiro Tanaka、H. Kitajima、M. Kodaka 等 4 位作者1998-01-01IEEE Transactions on Dielectrics and Electrical Insulation
A new analysis of conduction current distributed in dielectrics based on simultaneous measurements of thermally stimulated current (TSC) and time dependent space charge distribution is proposed. A new system pulsed electro-acoustic (PEA) method has been developed to enable simultaneous measurement of the TSC and the d…
High voltage insulation and dielectric phenomenaElectrostatic Discharge in ElectronicsElectrical Fault Detection and Protection
Jun‐Hyung Kim、Young-Chul Park、Yoo-Jin Yim 等 4 位作者1998-01-01JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
The crystallization behavior of hexanitrohexaazaisowurtzitane (HNIW) has been investigated at 298 K. Only the β form crystallized at the initial stage of crystallization, and it converted to the ε form with a solution-mediated transformation mechanism. Through the measurement of the solubilities of each polymorph (β a…
Inorganic and Organometallic ChemistryCrystallization and Solubility StudiesThermal and Kinetic Analysis
Hajime Sugita、Yoshiyuki Bando、Masaaki Nakamura1998-01-01JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
In order to apply a seeding method to the removal of silica from geothermal brines, the effects of temperature, initial seed concentration and initial silica concentration on the silica removal were experimentally examined. When silica gel seeds are added to a supersaturated silica solution, amorphous silica is precip…
TiO2 Photocatalysis and Solar CellsCatalytic Processes in Materials ScienceClay minerals and soil interactions
D. Lacey、H. N. Beattie、Geoffrey R. Mitchell 等 4 位作者1998-01-01Journal of Materials Chemistry
A series of monodomain liquid crystalline (LC) elastomers based on a polysiloxane were synthesised. These elastomers were prepared either with one or two cross-linking agents in the presence of a mechanical field. By using the real-time X-ray facility at the University of Reading (AXIS), we have shown that the nematic…
Liquid Crystal Research AdvancementsAdvanced Materials and MechanicsAdhesion, Friction, and Surface Interactions
Bénédicte Krattinger、Daniel J. Nurco1998-01-01Chemical Communications
Reactions of 2-nitro-5,10,15,20-tetraphenylporphyrin with alkyl α-isocyanoacetates afford naphthochlorins (in addition to the expected pyrroloporphyrins) which undergo free radical dimerization; the X-ray structure of one such naphthochlorin dimer is reported.
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsPorphyrin Metabolism and Disorders
Hiroshi Yamashita、Hidetake Yoshino、Keishi Nagata 等 6 位作者1998-01-01Journal of the Ceramic Society of Japan
The 29Si and 31P nuclear magnetic resonance (NMR) chemical shifts and the Qn distribution in ternary sodium phosphosilicate glasses were examined. In the NaPO3-SiO2 glasses, only the Si(Q4) unit from SiO2 and the P(Q2) unit from NaPO3 are observed. When the P2O5 content increases at fixed mole fractions of SiO2 equal…
Glass properties and applicationsPhase-change materials and chalcogenidesSolid-state spectroscopy and crystallography