Materials Literature
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The low-temperature alloying of Ag/Pd nanoparticles synthesized in a fatty acid film by a novel ion-entrapment process is described. Nanoparticles of silver and palladium were grown in thermally evaporated fatty acid (stearic acid) films by immersion of the film sequentially in solutions containing Ag + ions and Pd 2+…
[reaction: see text] Stoichiometry is found to be an effective tool for controlling supramolecular chirality induction and inversion processes. Chirality induction in the achiral syn ethane-bridged bis(zinc octaethylporphyrin) is achieved upon interaction with the enantiopure (R,R)-1,2-diphenylethylenediamine at the l…
Virgin ethylene propylene diene monomer (EPDM) rubber in a thermoplastic elastomeric blend of polypropylene (PP) and EPDM rubber was substituted by ground EPDM vulcanizate of known composition, after which the mechanical properties of the raw EPDM/waste EPDM/PP blends were determined. The ratio of the rubber content i…
The X-ray crystal structure and the second order nonlinear optical response of trans-stilbazole are discussed. Given that diffraction intensities are completely insensitive to any small distortion from centrosymmetry, stilbazole X-ray diffraction data are better modelled in the centrosymmetric P21/c space group and ca…
The present article deals with pore structure−chemical composition interactions of new high surface area manganese based porous mixed oxides (MANPOs). These mixed oxidic materials were prepared by the dropwise addition of a solution containing metal nitrate into an acetonic solution containing the trinuclear complex o…
Ferrocene-containing liquid crystals, non-linear optical materials and magnetic materials are of considerable interests for their high thermal stability, tunable redox characteristics and structural variability [1].[...]
Algorithms for the treatment of special positions in three-dimensional crystallographic space groups are presented. These include an algorithm for the determination of the site-symmetry group given the coordinates of a point, an algorithm for the determination of the exact location of the nearest special position, an…
ATR-FTIR spectroscopy was used to investigate in situ the adsorption of simple compounds, such as dicarboxylic acids, hydroxybenzoic acids and resorcinol, onto the clay mineral kaolinite. Identification of the absorption bands was based on changes which occur in the spectra of the compounds on changing the pH value of…
The paper reviews the present state of research in the field of metal-carbon nanocomposites and the interaction of metal atoms with graphitic structures. Metal crystals can be encapsulated within graphitic shells of cylindrical, spherical, or other geometry. Various chemical and physical production methods to generate…
The physical origin of the large differences between the glass transition temperatures ( T g ) exhibited by various stereoregular PMMA is not yet fully understood. Currently available theories on the glass transition phenomena are not able to predict the observed behavior. In this paper, results obtained from molecula…
A single-crystal structure analysis of [Cu2(bben)2(N3)4]n (1) [bben1,2-bis(benzylamino)ethane] revealed that the complex consists of double asymmetric μ2-1,3-azide-bridged dimeric copper(II) moieties; each copper(II) coordinates with one bben, one terminal azido, and the two bridging azido ligands. The Cu–N3–Cu torsio…
A pentaerythiritol-based metallodendrimer with four ruthenium(II) terpyridine units (RuDen) and a Dawson-type phosphotungstate, P2W18O626- (P2W18) are immobilized on a glassy carbon electrode to form multilayered self-assemblies by layer-by-layer deposition based on electrostatic interaction. The (P2W18|RuDen) multila…
Rare earth oxide dispersions, primarily europium doped yttria (YOX), in the ordered mesoporous material SBA-15 were synthesized by impregnating the calcined host material with different aqueous rare earth nitrate solutions and subsequent calcination. The materials obtained were characterized by N 2 -sorption measureme…
Polythiophene (PT), poly(3-chlorothiophene) (PCT), and poly(3-methylthiophene) (PMeT) have been electrochemically deposited on mirrorlike stainless steel (SS) electrode surfaces by direct oxidative polymerization of corresponding monomers in boron trifluoride diethyl etherate (BFEE) solution. The doping levels of as-g…
We report the synthesis and characterization of a series of luminescent chemosensory materials that have the conjugated polymer poly[ p -(phenyleneethynylene)- alt -(thienyleneethynylene)] (PPETE) as a backbone and oligopyridine pendant sites as receptors. These polymers are soluble in common organic solvents and high…
Electrocatalytic oxidation of methane over anodes in single-chamber solid oxide fuel cells, 0-10 wt % Pd-30 wt % <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="ML1" overflow="scroll"> <mml:msub> <mml:mi mathvariant="normal">Ce</mml:mi> <mml:mrow> <mml:mn>0.8</mml:mn> </mml:mrow> </mml:ms…
A novel approach to the preparation of polymer nanocomposites utilizing a low-molecular-weight reactive modifying reagent has been developed in this study. This is the first report on the fabrication of in situ nanocomposites using maleic anhydride as a reactive reagent that acts both as a modifying additive for the p…
High purity iron, which transforms into the hcp phase under pressure, has recently been reported to be superconducing in the pressure range 150-300 kBar [shim]. The electronic structure and the electron-phonon coupling ($λ_{ph}$) are calculated for hcp iron at different volumes. A parameter-free theory for calculating…
Perpendicularly orientated ZnO rods have been grown on thin ZnO templates, from aqueous solutions of zinc acetate and hexamethylenetetraamine (HMT); growth along the c-axis of the ZnO crystallites is promoted by the presence of acetate in the bath.
We review recent development in Raman techniques and diamond anvil cell technology, that allow measurements of Raman of metals in the megabar pressure range. The Raman technique includes holographic transmission optics and single-stage spectrographs with CCD array detectors. Use of synthetic high-purity diamonds and a…