Materials Literature
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A series of novel polymeric compounds of formula [M(btzb)3][ClO4]2 (MII = Fe, Ni or Cu) with btzb = 1,4-bis(tetrazol-1-yl)butane have been prepared and their physical properties investigated. The btzb ligand has been prepared and its crystal structure determined, together with a tentative crystal structure of the 3-D…
A series of magnesia-supported palladium catalysts (Pd loading in the range 0.5–7.0 wt.%) has been prepared by impregnation from aqueous solutions of PdCl2 , Pd(NH3)4Cl2 and Pd(CH3COO)2 and characterised by X-ray diffraction (XRD), CO chemisorption and high resolution transmission electron microscopy (HRTEM). The gas-…
The intercalation mechanism of lithium ions into graphite layers has been studied in organic solvents employing nuclear magnetic resonance (NMR) and electrochemical impedance spectroscopy (EIS) experiments. The lithium ions solvated with these solvent molecules were shown to intercalate into the graphite lattices by N…
Research Article| March 01, 2001 Metamorphic diamonds: Mechanism of growth and inclusion of oxides L.F. Dobrzhinetskaya; L.F. Dobrzhinetskaya 1Institute of Geophysics and Planetary Physics, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar H.W. Gree…
Binary titanium alloys with the beta-stabilizing elements of Co, Cr, Cu, Fe, Mn and Pd (up to 30%) and Ag (up to 45%) were examined through metallographic observation and X-ray diffractometry to determine whether beta phases that are advantageous for dental use could be retained. Corrosion behavior was also investigat…
Shape memory alloys (SMA), because of their unique mechanical characteristics and shape memory effect (SME), have been widely used as force and displacement actuators in many fields [DUERING et al, 1990]. In the industrial applications, it is necessary not only to calculate the mechanical response of the actuator in t…
The life model proposed previously by the authors ascribes electrothermal aging to the formation and/or enlargement of nanovoids driven by electromechanical energy stored in local concentrations of space charge. In the previous work, the strain associated with the mechanical stress produced by the space charge center…
Using in situ FTIR spectroscopy and mass spectrometry, it has been demonstrated that deNOx activity in oxide-based catalysts such as ceria can be correlated to the amount of oxygen vacancies present on the surface of the material. These results have been correlated to the total amount of exchanged oxygen for ceria-bas…
Nonpolluting systems based on anionic polyurethane aqueous dispersions were obtained. The prepolymer based on hydroxyl-terminated polybutadiene (HTPB), isophorone diisocyanate (IPDI), poly(propylene glycol) (PPG), and dimethylolpropionic acid (DMPA) were synthesized in bulk. After neutralization with triethylamine (TE…
We applied the electrochemical atomic layer epitaxy (ECALE) methodology to obtain deposits of CdS and ZnS on Ag(111) by alternate underpotential deposition of the elements forming the compounds. The amounts of the elements deposited, determined by stripping coulometry, always yielded a stoichiometric 1:1 ratio. The de…
Silk fabrics were modified by treatment with tannic acid (TA) solution or by acylation with ethylenediaminetetraacetic (EDTA) dianhydride. Kinetics of modification with TA and acylation with EDTA–dianhydride was investigated. The physico-mechanical properties of silk fabrics acylated with EDTA–dianhydride remained unc…
Aromatic polyamides based on a novel bis(ether-carboxylic acid) were synthesized by the direct phosphorylation condensation method. 1,4-Bis(4-carboxyphenoxy)-2,5-di-tert-butylbenzene was combined with various diamines containing flexible linkages and side substituents to render a set of eight novel aromatic polyamides…
Chiral binaphthyl derivatives having two photochromic diarylethene units were synthesized in an attempt to use them as dopants for photoresponsive liquid crystals. These compounds showed thermally irreversible photochromic reactions. The circular dichroism (CD) spectra and the optical rotation values of the derivative…
It is shown that the contributions of electronic and ionic charge carriers to the grain boundary conductivity can be separated by selectively blocking one of the carriers. In this way, the electronic and the ionic partial conductivity at the grain boundary of a 0.016 wt % Fe-doped bicrystal were determined in the temp…
The synthesis and mesomorphic properties of a series of 1,2-phenylene bis[4-(4-alkyloxyphenylazo)benzoates] are reported. The mesophases exhibited by these bent-shaped azo compounds are identified as nematic, smectic A and crystal E phases. All these compounds have fairly low transition temperatures, and so are suitab…
Abstract An algorithm for the calculation of electronic g tensors from configuration interaction (CI) wave functions and its implementation for any ground‐state spin S is described. The algorithm can be used together with either single‐ or multireference CI wave functions but assumes a spatially nondegenerate ground s…
The mechanistic model of uniform CO corrosion is presented which covers: electrochemical reactions at the steel surface, diffusion of species between the metal surface and the bulk including diffusion through porous surface films, migration due to establishment of potential gradients and homogenous chemical reactions…
Colloids, phases, interfaces Emulsions - properties and production Microemulsions, vesicles and liposomes Foams Production and properties of colloid suspensions and dispersions Solids Rheology Solubility parameters Solubility, crystallization Purification, detergency Cosmetics Pharmaceutical technology Food formulatio…
The corrosion of zinc in (HNO3 + H 3 PO 4 ) binary acid mixture containing ethanolamine, diethanolamine and triethanolamine has been studied. In plain mix acid, corrosion increases with concentration of acid and with the temperature. At constant acid concentration, the inhibition efficiency of ethanolamine, diethanola…
The promoting effect of CeO2 in a Cu/CeO2 catalyst for CO oxidation and NO reduction compared to CuO and Cu/ZrO2 is deduced to be based on lowering of redox potentials of copper species in the Cu/CeO2 matrix in relation to CuO and Cu/ZrO2.