Materials Literature
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We report inelastic light scattering experiments on the single-layered manganite $\mathrm{La}\mathrm{Sr}\mathrm{Mn}{\mathrm{O}}_{4}$. The distinct features observed are the appearance of numerous symmetry-forbidden phonon peaks, with a strong temperature dependence of their intensity and frequency, and a double-peak s…
Ti time for dioxane: Oxidation of 1,4-dioxane with aqueous H2O2 over various titanosilicates was investigated. Use of Ti-MWW as catalyst leads to much higher conversions than with TS-1 and Ti-Beta under solvent-free conditions and is accounted for by a radical mechanism. The number of active intermediate Ti species is…
Abstract Inorganic nanostructures have been intensively studied because of their size‐dependent emission color as a result of quantum confinement effects. In contrast, no significant size dependence of the optical properties is expected for organic nanostructures owing to the weak nearest‐neighbor interactions in mole…
Abstract We investigated the electrical‐transport properties of hydroiodic acid doped polyaniline in the temperature range 77–300 K, applying magnetic field strength to a maximum of 1 T in the frequency range 20 Hz–1 MHz. The direct‐current conductivity was explained by variable range hopping theory, and the direct‐cu…
Hydrothermal (deuteratothermal) reaction of L-ethyl lactate (Lig-Et) with Eu(ClO(4))(3)6 H(2)O gives colorless block crystals of [Eu(Lig)(2)(X(2)O)(2)][ClO(4)] (1, X=H; 2, X=D) both of which possess a two-dimensional laminar homochiral framework. Single-crystal dielectric measurements reveal that 1 and 2 display a gia…
Abstract Two novel multifunctional precursors with eight alcoholic hydroxyls were synthesized by derivatization of resorcinarene. Well‐defined eight‐arm star‐shaped poly(ε‐caprolactone)s (SPCLs) with reasonably narrow molecular weight distributions have been successfully prepared using the precursors as macro‐initiato…
The transport properties across perovskite oxides heterointerfaces are analyzed. Epitaxial La(2/3)Ca(1/3)MnO3/SrTiO3 (LCMO/STO) heterostructures with different STO insulating-barrier thicknesses are systematically investigated and their behavior compared with LCMO/metal junctions. Atomic force microscopy (AFM) measure…
The oxidation of citronellal to citronellic acid was studied using molecular oxygen as oxidant and gold-containing supported catalysts under aqueous conditions. The reactions were carried out at 60-90 degrees C, with 200 Nml min(-1) O2 and at pH values from 9 to 12. The alumina- or titania-supported catalysts were syn…
Abstract Poly(decamethylene 2‐oxoglutarate) [poly (DMOG)] was synthesized by a melt polycondensation reaction. The structure of poly(DMOG) was confirmed by means of Fourier transform infrared, 1 H‐NMR, and 13 C NMR spectroscopies. The molecular weight distribution values of poly(DMOG) were determined with size exclusi…
Ab initio calculations within density functional theory with generalized gradient approximation have been performed to study the effects of oxygen vacancies on the electronic structure and magnetism in undoped V 2 O 5- x (0 < x < 0.5). It is found that the introduction of oxygen vacancies would induce ferromagnetism i…
We theoretically analyze waves propagating between an isotropic nonabsorbing medium and a uniaxial absorbing medium in the general case where the incidence plane does not coincide with the principal section of the uniaxial crystal. Expressions for the reflection and transmission coefficients are derived by a combinati…
Abstract A new synthetic strategy for high‐flow nylon 6 was developed in this article. Generation 1, 2, 3 (G1, G2, G3) polyamidoamine (PAMAM) dendrimers reacted with p ‐phthalic acid by equimolar terminal groups in water solution, respectively, and mother salt solution was then prepared. The high‐flow nylon 6 was prep…
We present spectroscopic evidence for charge ordering in β-( meso -DMBEDT-TTF) 2 PF 6 below ∼70 K. Its infrared and Raman spectra change abruptly at ∼70 K. The amplitude of the charge order was estimated to be 0.5 from the splitting of the infrared-active C=C stretching mode. The coexistence of both high-temperature a…
Mn-doped TiO 2 (Ti 1− x Mn x O 2 ) bulk samples with nominal composition x = 0.02, 0.04, 0.08 have been prepared by a solid-state reaction and sintered at different temperatures ranging from 450 °C to 900 °C. For samples with x = 0.02, magnetic investigations show that room temperature ferromagnetism can be obtained a…
Abstract We found that a novel Pd(0)‐catalyzed polycondensation of methyl propargyl carbonate ( 1 ) and bisphenol analogs 4 such as 4,4′‐dihydroxydiphenyl ether (4b ) proceeded successfully and gave polyethers 5 having exomethylene groups. The polycondensation was affected by the kind of bisphenol analogs used. The mo…
The study of the structural transition in nanoscale materials is of particular interest for their potential applications. In the present study, we have observed a lower temperature T = 250 °C for the phase transition from the sphalerite structure to the wurtzite structure in ZnS nanoparticles under a pressure of 1 GPa…
Biological reduction of nitric oxide (NO) to di-nitrogen (N(2)) gas in aqueous Fe(II)EDTA(2-) solutions is a key reaction in BioDeNOx, a novel process for NOx removal from flue gases. The mechanism and kinetics of the first step of NO reduction, that is, the conversion of NO to N(2)O, was determined in batch experimen…
A facile and green synthesis route to a mesoporous solid solution of Zn−Al spinel-type complex oxide (ZnAl 2 O 4 ) without using organic template has been successfully established. This approach involves the formation of precursor utilizing urea hydrolysis under hydrothermal conditions followed by calcination at high…
Abstract Pyridinium phenolates possess a dissymmetric delocalised π‐electron system providing a huge quadratic nonlinearity. They are a promising class of molecules for applications in photoelectronics and photonics. Semiempirical calculations indicate that the interplanar angle between the two aromatic rings leads to…
The high-pressure behavior of the Prussian Blue analogue $\mathrm{Fe}[\mathrm{Co}{(\mathrm{C}\mathrm{N})}_{6}]$ has been explored by energy- and angle-dispersive x-ray diffraction, Fourier transform infrared, and Raman spectroscopy. This cyanide-bridged framework material becomes x-ray amorphous above $10\phantom{\rul…