Materials Literature
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The reactions of PhP(O)(OH)2 or Ph2P(O)OH with Ti(OPri)4 in DMSO give the soluble tetranuclear complexes [Ti4(µ3-O)(OPri)5(µ-OPri)3(PhPO3)3]·DMSO 1 or [Ti(µ3-O)(OPri)(Ph2PO2)]4·0.5DMSO 2, the first examples of phosphonato- and phosphinato-bridged titanium oxo alkoxides, which have been characterised by single-crystal…
Applied to the new iron(II) compound Fe(t-msbpy)2(NCS)2 (t-msbpy=4-methyl-4′-trans-styryl-2,2′-bipyridine), a novel strategy based on the so-called '‘ligand-driven light-induced spin change’' (or LD-LISC) effect, which consists in triggering the metal ion electronic spin-state crossover in a complex by a photochemical…
The effects of microstructure on the hydrogen trapping ability and effective diffusivity in steels with different carbon content have been studied. The sites for trapping hydrogen in pure iron, ferrite/pearlite steel, and the martensitic structure etc. have been identified. The hydrogen pick‐up was generally increased…
X-Ray photoelectron spectroscopy (XPS) analysis was used to verify the structure of nanosized overoxidized polypyrrole (OPPy) films that were grown on glassy carbon. The films were electrochemically grown to ca. 1.2–1.6 nm thickness from acetonitrile with tetrabutylammonium perchlorate (TBAP) and from water with adeno…
Electrospray mass spectrometry (ESMS) has been performed on aqueous solutions of dilute (10–3 M) isopolyoxomolybdate systems. There is direct evidence that the evaporation process in the ESMS technique involves significant chemical effects, resulting in the detection of many new anions and cations. For ammonium polyox…
Structural changes stimulated by ultraviolet (UV) irradiations of sol–gel-derived indium oxide thin films were investigated. Illumination of incoherent UV photons (4.9 eV) from a low-pressure mercury lamp resulted in formation of crystalline indium metal. Irradiation of coherent UV beams from an ArF excimer laser (6.4…
At 1100 K a new phase of WO 3 with space group P 4/ ncc , a = 5.2885(5) Åand c = 7.8626(8) Å, was established, and its crystal structure was determined. The previously known tetragonal phase P 4/ nmm , which is shown to exist only above 1170 K, was also refined with a = 5.3031(4) Åand c = 3.9348(3) Åat 1200 K. The dif…
Mechanical milling of initially ordered ferromagnetic ${\mathrm{SmCo}}_{5}$ produces dramatic increases in coercivity after short (15 min to 1 h) milling times, accompanied by remanence ratios on the order of 0.7 and shifted hysteresis loops. X-ray diffraction shows that milling induces both chemical and structural di…
Abstract Although most industrial drying and separation technologies are based on transport of multiple components, a convenient and practical means of describing multicomponent diffusion over wide temperature and concentration ranges has not been developed for polymer solutions or even for simple liquid mixtures. We…
Intumescent coatings are among the most efficient ways of fire retarding flammable materials. The coatings swell under the influence of heat and form a thick porous charred layer. The latter perfectly insulates the substrate against an excessive increase of temperature and oxygen access. In order to make intumescent c…
Condensation of 3,4-diethylpyrrole with 1,3-diformylindane in the presence of catalytic HBr afforded, following oxidation with FeCl3, the first example of a dicarbaporphyrin in moderate yield; this novel bridged annulene system retains a strong diamagnetic ring current in 1H NMR spectroscopy as well as a porphyrin-lik…
Electrochemical oxidation of p‐silicon of different crystal orientation and doping density has been investigated in fluoride containing nonaqueous solution of acetonitrile and dimethylformamide. The formation of a macroporous layer with macropore diameter and length in the micron range in acetonitrile is observed only…
Abstract The oxidation of dimethyl ether (DME) under flow reactor conditions has been studied experimentally and in terms of a detailed chemical kinetic model. The experiments were performed at atmospheric pressure in the temperature range 600–1500 K and at different air/fuel ratios. Of particular interest was the int…
The fact that only compounds 1a, 1b and 2a in the series 1– 3 show long-range 13C–19F coupling can be used to draw conclusions regarding the structures of these molecules.
This paper investigates the effect of nonsinusoidal voltage, i.e. voltage affected by the presence of harmonics, on intrinsic aging of cable and capacitor insulating materials, i.e. cross-linked polyethylene (XLPE) and polypropylene (PP). The results of life tests under sinusoidal and distorted voltage, the latter obt…
The effect of the simultaneous partial substitution of Co/sup 2+/ for Fe/sup 3+/ and of La/sup 3+/ for Sr/sup 2+/ ion in Sr ferrite on the magnetic properties of anisotropic Sr ferrite magnets was investigated. It was found that the coercive force of Sr ferrite magnets is increased without significant decrease in resi…
We present the design, fabrication, and test of a polarizing beam splitter grating for operation at 633 nm under a angle of incidence. This component is compact and its fabrication is reproducible enough to be integrated in optical reconfigurable interconnect systems. For TE polarization, the incident beam is undeflec…
Mercury (Hg) is one of the most toxic metals found in the environment. The purpose of this study was to investigate the performance of an innovative technology, self-assembled monolayers on mesoporous supports (SAMMS), in separating and immobilizing Hg from aqueous solutions. The high surface area of the mesoporous si…
Contents Adhesion to Wood 9--1 Surface Properties of Wood Adherends 9--2 Extractives on Surfaces 9--3 Knife- and Abrasive-Planed Surfaces 9--3 Veneer Surfaces 9--4 Surfaces of Wood and Nonwood Composite Products 9--5 Physical Properties of Wood Adherends 9--6 Density and Porosity 9--6 Moisture Content and Dimensional…
Reversible binding of hydrogencarbonate to a chiral di-aqua lanthanide complex occurs in the pH range 6.5–8.5, limiting the measured relaxivity in the gadolinium complex and enhancing the metal-based emission in the europium analogue.