Materials Literature
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A vanadia-titania mesoporous xerogel (10.5 wt% V(2)O(5)) was prepared from chloride precursors using a one-step non-hydrolytic sol-gel route and subsequent drying at ambient pressure; after calcination at 773 K for 5 h no crystalline V(2)O(5) was detected and the resulting mixed oxide exhibited remarkable activity in…
A processable polyborazine was synthesised by an original method under mild conditions and then converted into high performances boron nitride fibres.
The ground state electronic properties of metal-exchanged Preyssler heteropolyoxoanions [M(n+)P(5)W(30)O(110)](n-15), in which the encapsulated M(n+) ions are the spherical, diamagnetic ions Na(+), Ca(2+), Sr(2+), Y(3+), La(3+) and Th(4+), are studied using a combination of electrochemical, optical, and NMR experiment…
Electronic phase separation is increasingly getting recognized as a phenomenon of importance in understanding the magnetic and electron transport properties of transition metal oxides. The phenomenon dominates the rare-earth manganates of the formula Ln(1-x)A(x)MnO(3)(Ln = rare earth and A = alkaline earth) which exhi…
A comprehensive understanding of the design, synthesis, characterization, and properties of boron carbonitride nanotubes (BCN) is presented in this review. Distinctive structural and electronic properties are revealed in theoretical studies of the BCN nanotubes and compared with the properties of carbon nanotubes. In…
Hexadehydro[12]annulenes annelated with one or two TTF units have been synthesized to investigate their pi-amphoteric properties based on the TTF and [12]annulene moieties; these compounds show multi-redox potentials, solvatochromism and the formation of large sandwich complexes.
Sonication of nanoparticle suspensions confined within aqueous droplets of drug molecules in toluene produces drug-loaded silica or titania porous microspheres with complex morphology and storage/release properties.
An octanuclear copper(II) complex possessing a dimer-of-tetramers structure self-assembles from a binuclear oxamatocopper(II) metallacryptand of the meso-helicate type; its magnetic behaviour is consistent with its unique double-propeller molecular topology.
BACKGROUND: Accurate measurement of the mechanical properties of skin has numerous implications in surgical repair, dermal disorders and the diagnosis and treatment of trauma to the skin. Investigation of facial wrinkle formation, as well as research in the areas of skin aging and cosmetic product assessment can also…
This study reveals self-assembly patterns of the tetra(4-pyridyl), tetra(4-hydroxyphenyl) and tetra(4-carboxyphenyl) zinc porphyrin moieties when reacted with a hexamethylenetetramine ligand, forming 1 ∶ 1 five-coordinate, 1 ∶ 2 and 1 ∶ 2 six-coordinate complexes, respectively. Detailed structural characterization of…
The undoped ZnO films were grown on silicon (001) substrates by radio frequency magnetron sputtering. The dependence of defect formation and photoluminescence (PL) of ZnO films on the annealing temperature and oxygen mole ratio (OMR) were investigated using X-ray diffraction and PL spectra. A sharp ZnO (002) peak with…
We synthesized dialkylterthiophene derivatives ω-substituted with cyclohexylethyl moiety, which exhibit smectic mesophases at room temperature, and investigated their charge carrier transport properties. In particular, trans-pentylcyclohexylethyl-propylterthiophene (3-TTP-C2CH-5) held SmB phase at room temperature. Fu…
Fourier transform mid-IR and Raman spectroscopies were extensively used to examine cation/polymer and cation/cross-link interactions, as well as hydrogen bonding, in Eu3+-doped sol–gel derived organic/inorganic materials (monourethanesils). The hybrid framework of these xerogels contains short methyl end capped polyet…
The AZEP (Advanced Zero Emissions Power Plant) project addresses the development of a novel “zero emissions,” gas turbine-based, power generation process to reduce CO2 emissions. Preliminary calculations indicate the attractiveness of this concept in comparison to conventional tail-end CO2 capture. Key to achieving th…
Homogeneous electron transfer reactions of the Cu(II) complexes of 5,10,15,20-tetraphenylporphyrin (TPP) and 2,3,7,8,12,13,17,18-octaethylporphyrin (OEP) with various oxidizing reagents were spectrophotometrically investigated in acetonitrile. The reaction products were confirmed to be the pi-cation radicals of the co…
A photochromic stilbazole unit has been incorporated into the bridge in a donor–bridge–acceptor scaffold constructed via a coordination interaction, wherein an efficient electron transfer occurs for the cis isomer of the bridge whereas no electron transfer is detected for the trans isomer.
This contribution presents a series of results from different photophysical experiments realized at both resonance and off-resonance conditions on a group of newly synthesized cofacial bridged phthalocyanines. The most relevant aspect of the present study is the identification of a common photoexcited state, which can…
In this work, the alkaline digestion of chrome shavings with sodium hydroxide was studied. We have demonstrated that the best operating conditions would be about 0.5M for NaOH concentration and 15 minutes for the reaction. The process allows the recovery of proteins in the aqueous phase and the metallic salts in the s…
鉄鉱石では, Pisolite に続き,Hematite-Goethite の MarraMamba 鉱石の使用技術確立が当面の課題であろう。鉄鉱石ソースが,遠距離のブラジルに依存するところ少なくない事やフレートの変動の大きさ(Fig.14)を考えれば,柔軟で敏速な対応が使用技術に求められる機会も増えると予測される。石炭については,優良強粘結炭のソースは限定されており脱優良強粘結炭依存が最も大きな課題である。PCI増を含む,高炉でのコークス比低減や,将来的には, DIOS(Direct Iron Ore Smelting Reduction Process)43)のような直接還元法,コークス製造技術では,究極的には SCOPE21…
In an effort to simulate the human body for measuring contact pressure, a soft mannequin has been developed with the dimensions of the lower torso of a real female body. The mannequin contains a full-size bone skeleton, imitating soft tissue and skin. The imitated soft tissue is made from flexible polyurethane foam of…