4-Ferrocenylbenzoic Acid
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].[...]
Materials Literature
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Algorithms for deriving crystallographic space-group information. II. Treatment of special positions
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…
An in situ ATR-FTIR study on the adsorption of dicarboxylic acids onto kaolinite in aqueous suspensionsDedicated to Professor F. Dörr on the occasion of his 80th birthday.
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…
METAL ATOMS IN CARBON NANOTUBES AND RELATED NANOPARTICLES
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…
Local Dynamics of Stereoregular PMMAs Using Molecular Simulation
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…
An unusual alternating ferro- and antiferromagnetic 1D hydrogen-bonded µ2-1,3-azide-bridged copper(II) complex: a dominant ferromagnetic couplingElectronic supplementary information (ESI) available: EPR spectra of 1 (Fig. S1) and fit of χMT data with the binuclear model (Fig. S2). See http://www.rsc.org/suppdata/nj/b1/b108511p/
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…
Nanocomposite Multilayer Film of a Ruthenium Metallodendrimer and a Dawson-Type Polyoxometalate as a Bifunctional Electrocatalyst
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 Coating of the Walls of SBA-15
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…
Raman Spectroscopic and Electrochemical Studies on the Doping Level Changes of Polythiophene Films during Their Electrochemical Growth Processes
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…
Poly[p-(phenyleneethynylene)-alt-(thienyleneethynylene)] Polymers with Oligopyridine Pendant Groups: Highly Sensitive Chemosensors for Transition Metal Ions
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…
High Performance Anodes for SOFCs Operating in Methane-Air Mixture at Reduced Temperatures
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…
Novel Preparation and Properties of Polypropylene−Vermiculite Nanocomposites
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…
Ferromagnetic and antiferromagnetic spin fluctuations and superconductivity in the hcp-phase of Fe
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…
Novel low temperature solution deposition of perpendicularly orientated rods of ZnO: substrate effects and evidence of the importance of counter-ions in the control of crystallite growth
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.
Raman Scattering of Metals to Very High Pressures
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…
Investigation of the Influence of Polyelectrolyte Charge Density on the Growth of Multilayer Thin Films Prepared by the Layer-by-Layer Technique
We examine the influence of the charge density along a polyelectrolyte chain on the buildup of multilayer films formed by the sequential adsorption of alternating layers of polyanions and polycations (the layer-by-layer technique). Model random copolymers of diallyldimethylammonium chloride (DADMAC) and N -methyl- N -…
A second distinct structural “state” of high-density amorphous ice at 77 K and 1 bar
High-density amorphous ice (HDA), further densified on isobaric heating from 77 K to 165 (177) K at 1.1 (1.9) GPa, relaxes at 77 K and 1 bar to the same structural “state” with a density of 1.25 ± 0.01 g cm−3. Its density is higher by ≈9% than that of HDA, and thus it is called very-high-density amorphous ice (VHDA).…
Probing Phonon Dispersion Relations of Graphite by Double Resonance Raman Scattering
The phonon dispersion relations of graphite can be probed over a wide range of the Brillouin zone by double resonance Raman spectroscopy. The double resonance Raman process provides us with new assignments for the dispersive and nondispersive features observed in the Raman spectra of disordered graphite and carbon nan…
X-ray linear dichroism in an α,ω-dibromoalkane/urea inclusion compound and its application to polarization analysis of magnetic diffraction
X-ray linear dichroism in an α,ω-dibromoalkane/urea inclusion compound and its application to polarization analysis of magnetic diffraction, S P Collins, D Laundy, K D M Harris, B M Kariuki, C L Bauer, S D Brown, P Thompson
Current-limiting property of Cu/cupric oxide/Cu sandwich structure
In this study the electrical conductivity of a Cu/cupric oxide/Cu sandwich structure was investigated in order to understand the instability in the electrical transportation mechanism of cupric oxide (CuO). In order to obtain the Cu/CuO/Cu sandwich structure, Cu was coated onto the surfaces of a granular and polycryst…