Materials Literature
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The crystal structure of [RuO2(bipy){IO3(OH)3}]·1.5H2O 1 is reported: with NaIO4 or NBun4IO4 as cooxidant it is an efficient catalyst for alkene epoxidations under mild conditions; it also oxidises primary alcohols to aldehydes and secondary alcohols to ketones.
Deformation microstructures of a low carbon steel with ferrite-pearlite structures have been examined with tritium autoradiography and thermal desorption spectroscopy. The amount of non-diffusible tritium at room temperature increases with strain. When deformed at room temperature which is in the ductile fracture regi…
The possibility of forming the topologically close-packed Laves phase has been investigated in various Ni-base superalloy systems that contain a significant amount of Nb. Simplified alloy compositions consisting of various combinations of major alloying elements, including Cr, Fe, and Co, were prepared; a high level o…
Aluminium nitride (AIN) powder was prepared by using a (hydroxo)(succinato)aluminium(III) complex as a new precursor. The AIN powder was obtained by calcining the complex without mixing any carbon source under a flow of nitrogen in the temperature range 1200–1500 °C and then burning out the residual carbon. The comple…
Alumina/silicas have been prepared by three methods: complexing-agent-assisted sol–gel, coprecipitation and hydrogel kneading. The properties of these alumina/silicas were investigated by solid-state magic-angle-spinning nuclear magnetic resonance (MAS NMR), ammonia temperature-programmed desorption (TPD) and nitrogen…
The surface characteristics of NiHZSM-5 zeolites prepared by ion-exchange, impregnation and mechanical mixing methods have been studied by XPS. The results show that because of the interaction between NiII species and the zeolite, nickel can exist in many forms on the surface of the zeolite, e.g. NiO, Ni(OH)2 and NiAI…
Only limited data are available on the diffusion of volatile organic solvents through flexible membrane liners (FMLS) used for lining impoundments and landfills. To expand this database, a rapid, inexpensive method is needed to measure the diffusion coefficients of volatile organic solvents through FML materials. An a…
The stability to light of 1,3,3,1′,3′,3′-hexamethyl-2,2′-indotricarbocyanine iodide (HITC) included in β-cyclodextrin (β-CyDx) has been examined. The quantum yield of the photodegradation of HITC was found to decrease with increasing formation of the inclusion complex, showing that the photostability of the dye can be…
Rare-earth manganese(III, IV) oxides REMn2O5 show a series of phase transitions at lower temperatures. There is a possibility that both electric and magnetic ordering coexist in a low-temperature phase. The recent dielectric, magnetic and magnetoelectric studies of these oxides are reviewed in this Paper.
The synthesis and crystal structure of the pseudo-orthorhombic (a≈b≈√2a0, c≈2a0) ordered perovskite MLaMgTeO6(M = Na and K) are reported. X-ray, electron and neutron diffraction and microscopy established that both compounds have a perovskite structure with ordering in the A and B sublattices.
Abstract The effect of tetraalkylammonium ions on the destabilization of foam has been studied by measuring the half‐life of foam (τ 1/2 ), area/molecule at the air/water interface, surface viscosity and critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS). The area/molecule of SDS in organic salt solu…
The solvato- and halo-chromic behaviour of the phenolate dyes 4–6 is described and compared with their analogues 1 and 3. The observed trends are discussed and rationalized in terms of semiempirical molecular orbital calculations.
A facile synthesis of 2,3-disubstituted norbornadienes linked to meso-5,10,15,20-tetraphenylporphyrin ad anthracene by ethene or butadiene bridging groups is described and the potential of the derivatives to transport energy, a requirement for their action as molecular electronic devices, is discussed.
Abstract Cadmium Selenide (CdSe) thin films were prepared in different growth conditions by thermal evaporation. The films were characterised using transmission electron microscopy and X‐ray diffraction. The electrical parameters such as resistivity, carrier mobility, and concentration were determined. The sensitivity…
We demonstrate here the direct observation of the side view of surface folds in a swelling gel, which are induced by elastic instability. The fold structure along the thickness direction has been clarified, which is a prerequisite for understanding its singular nature. The elementary coarsening process of the fold pat…
The crystal of p-fluorophenyl nitronyl nitroxide [2-(4-fluorophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl 3-oxide, abbreviated as p-FPNN] radical has been found to possess a dimeric structure. Each dimer is related to adjacent ones by four-fold screw symmetry to form a three-dimensional network. The temp…
CuO/Al2O3 catalysts have been sulfated by oxidation of various amounts of SO2. The surface properties of the samples were studied using probe molecules. The IR spectra of CO species adsorbed on the non-sulfated sample show an strong band at 2125 cm–1 with a shoulder at 2160 cm–1, which shift to 2165 and 2180 cm–1, res…
A two-dimensional analysis of the in-plane misfit stress and its elastic relaxation in rectangular patterned heteroepitaxial SiGe/Si multilayer structures on Si substrate is presented. Based on the model of relaxing film stress the distribution of the misfit stress versus distance from the free surface of a multilayer…
Abstract 2‐(4′‐Hydroxyphenylbenzoyl)benzoic acid is readily available from phenolphthalein by reaction with hydroxylamine. On treatment with hydrazine, 4‐(4‐hydroxyphenyl)phthalazin‐1‐one is formed in high yield. Under conditions conventionally used for the synthesis of poly(aryl ether)s the phthalazinone reacts with…
The complex polymer [{Cu2L(pyca)(H2O}n][ClO4]n·2nH2O [H2L =N, N′-bis(2-ammoethyl)oxamide. Hpyca = pyridine-4-carboxylic acid] has been prepared and its magnetic properties and crystal structure determined. The crystals are monoclinic, space group P21/c, with 3 = 10.420(2), b= 13.118(2), c= 14.863(5)Å;, β= 93.05(2)°, a…