Materials Literature
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Metal oxide interfaces, metal coatings or dispersed metals on oxide supports play an important part in many technological areas. Nevertheless, there is still a lack of fundamental knowledge about the essential properties of thin metal films and small metal particles on oxide supports, although a deeper understanding c…
Are nanotubes ideally suited to a straightforward reinforcing role? Results reported here indicate that that may not be the case, but they could find application as a polymer modifier. A successful route is described for the fabrication of large composite films containing carbon nanotubes based on the formation of a s…
▪ Abstract The chemical effects of ultrasound derive primarily from acoustic cavitation. Bubble collapse in liquids results in an enormous concentration of energy from the conversion of the kinetic energy of the liquid motion into heating of the contents of the bubble. The high local temperatures and pressures, combin…
The category Computer Program Abstracts provides a rapid means of communicating up-to-date information concerning both new programs or systems and signi®cant updates to existing ones. Following normal submission, a Computer Program Abstract will be reviewed by one or two members of the IUCr Commission on Crystallograp…
Chemical reactions occurring in the combustion and decomposition of char-forming polymeric systems and the effects of the nature of the polymer and additives on the reaction pathways are discussed. The thermal characteristics of the chars formed upon combustion are considered. The bibliography includes 86 references.
A number of anomalous effects occurring at the compensation and Curie points of ferrites are explained on the basis of the concept of unidirectional exchange anisotropy. Among these are the violation of 'evennies' for the magnetostrictive, magnetoresistive, and magnetocaloric effects, the antiferromagnetic paraprocess…
The mechanisms of the heterogeneous photocatalytic behavior of TiO 2 and Cs 3 PW 12 O 40 for the oxidative destruction of N -methylpyrrolidinone (NMP) in water are discussed. Both photocatalysts generate N -methylsuccinimide (NMS) and succinimide as the main intermediates from oxidation at the α-carbon and methyl posi…
Generic quantum interference effects occuring in 1D-quasicrystals are reviewed with emphasis on the joint effect of phason disorder on electronic localization and propagation modes. In close conjunction with properties of real materials, the contributions of quantum interferences in several regimes close to the metal…
Experimental solubilities are reported for anthracene dissolved in ternary dibutyl ether + 1-propanol + cyclohexane, dibutyl ether + 2-propanol + cyclohexane, dibutyl ether + 1-butanol + cyclohexane, dibutyl ether + 2-butanol + cyclohexane, and dibutyl ether + 2-methyl-1-propanol + cyclohexane solvent mixtures at 25 °…
The boundary integral formulation of the solution to the Stokes equations is used to describe the deformation of small compound non-Newtonian axisymmetric drops suspended in a Newtonian fluid that is subjected to an axisymmetric flow field. The non-Newtonian stress is treated as a source term in the Stokes equations,…
Complexation of the ligand 3-diphenylamino-4-hydroxycyclobut-3-ene-1,2-dione (diphenylaminosquarate) with metal salts of La, Eu, Gd and Tb produced the first set of lanthanide complexes with a monosubstituted aminosquarate ligand. The lanthanum complex La[(C 6 H 5 ) 2 NC 4 O 3 ] 3 (H 2 O) 6 ·5H 2 O ( 1 ) is monomeric…
Jahn−Teller parameters have been calculated for a macrobicyclic cage complex of copper(II) having a CuN6 chromophore by using the density functional theory. Comparison of the calculated values with the corresponding experimental data shows an excellent agreement. The lowest energy on the adiabatic potential surface fo…
The oxidative degradation of PMR (for p olymerization of m onomeric r eactants) polyimides at elevated temperatures was followed by cross-polarized magic angle spinning (CP-MAS) NMR. Labeling of selected sites in the polymers with 13 C allowed for direct observation of the transformations arising from oxidation proces…
This study reports the lyotropic phase behavior of two poly(ethylene oxide)- b -poly(butadiene) diblock copolymers and their cross-linking in the mesophase under retention of the mesoscopic order. The lyotropic phase behavior in water was characterized by polarized light microscopy and small-angle X-ray scattering (SA…
The kinetics of adsorption of several positively and negatively charged proteins at the air/water and triolein/water interfaces have been studied. It is shown that adsorption of proteins at these interfaces is not simply diffusion-controlled but is strongly influenced by the energetics of interaction of proteins with…
Diblock copolymers consisting of polystyrene and acid-functionalized poly(propylene imine) dendrimers have been found to self-assemble spontaneously into regular microdomains. The hybride dendrimer−linear chain block copolymers yield highly asymmetric molecules which display an aggregation behavior at the strong segre…
A series of phthalocyanines containing 4, 8, and 16 2-ferrocenylethoxy moieties on the periphery have been prepared and spectroscopically characterized. The UV−vis spectrum of the tetraferrocenyl phthalocyanine 4 shows an unusual long-wavelength band at ca. 760 nm in nonpolar solvents. When the spectral changes of thi…
The sonoluminescence (SL) intensity from aqueous solutions containing either alkyl acids or alkylamines is shown to be dependent on both the hydrocarbon chain length of the solute and the pH of the solution. Alkylamines quench the SL only at pH values above about 9 whereas alkyl acids quench only below about pH 7. In…
Ab initio total energy calculations within the Density Functional Theory framework were carried out for Pt(111), Pt(111)-p(2×2)-CO, Pt(111)-p(2×2)-O, and Pt(111)-p(2×2)-(CO+O) to provide an insight into the interaction between CO and O on metal surfaces, an important issue in CO oxidation, and also in promotion and po…
In this work, carbon nanotubes were activated with Pd−Sn catalytic nuclei via a single-step activation approach. These activated nanotubes were used as precursors for obtaining nickel- and palladium-decorated nanotubes via electroless plating. Activation of the nanotube surfaces promoted specific deposition of metal o…