Materials Literature
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The solubility of erythromycin A dihydrate in pure ethanol, propan-2-ol, methanol, acetone, chloroform, and acetone + water was measured by a synthetic method at temperature ranging from 293.20 K to 323.00 K at atmosphere pressure. The laser monitoring observation technique was used to determine the disappearance of t…
Abstract Methacrylic acid (MAA) was used as in situ surface modifier to improve the interface interaction between nano‐CaCO 3 particle and ethylene–propylene–diene monomer (EPDM) matrix, and hence the mechanical properties of nano‐CaCO 3 ‐filled EPDM vulcanizates. The results showed that the incorporation of MAA impro…
A series of γ-brass related structures in the Zn-rich portion of the Zn−Pd phase diagram (ca. 80 at % Zn) is investigated using single-crystal diffraction and tight-binding electronic-structure calculations. Earlier research identified regular arrays of inversion antiphase domains (IAPDs) over a narrow composition ran…
Compound [Y(Hdo3aP(ABn))(H2O)][Y(Hdo3aP(ABn))].6H2O.iPrOH, where H4do3aP(ABn) is 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic-10-methyl(4-aminobenzylphosphinic) acid, a monophosphinate analogue of H4dota, was prepared in the solid state and studied using X-ray crystallography. In contrast to all single-crystal struc…
Monodispersed particles of the mesocaged material AMS-8 have been prepared by using nonionic polymeric cosurfactants to control the particle size. These particles are faceted, porous, and show surface structural characteristics that are typical of cubic AMS-8 (see picture), as well as an increased adsorption capacity…
Abstract Magnetic Ni 0.5 Zn 0.5 Fe 2 O 4 ‐crosslinked polyaniline composites with a core–shell structure were prepared in the presence of Ni 0.5 Zn 0.5 Fe 2 O 4 magnetic powder in a toluene solution containing iron chloride as a surfactant and dopant. Structural characterization by Fourier transform infrared, X‐ray di…
We develop a self-consistent-field lattice model for block copolymers and propose a novel and general method to solve the self-consistent-field equations. The approach involves describing the polymer chains in a lattice and employing a two-stage relaxation procedure to evolve a system as rapidly as possible to a free-…
We describe the preparation of polystyrene−polyisoprene−polylactide and polyisoprene−polystyrene−polylactide ABC triblock terpolymer thin films followed by removal of one or both sacrificial components (i.e., polylactide and polyisoprene) to give large area arrays of nanopores and more complex “nanobushing” structures…
Thermoresponsive gold nanoparticles (GNPs) have been prepared by the borohydride reduction of gold salt in the presence of water-soluble polymer, poly(vinyl methyl ether) (PVME). The PVME-coated GNPs (PVME-GNPs) have been assembled into large aggregates in the presence of polyelectrolytes, viz., poly(sodium-4 styrene…
${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6}$ samples with various degrees of Fe, Mo ordering were prepared from a sol-gel-derived precursor with a sample-encapsulation technique. The order parameter $\ensuremath{\xi}$ for Fe and Mo, determined by Rietveld refinement, ranged from 0.56 to 0.95. Structural data suggest that t…
Cd1-xMnxS (x = 0.1-0.3) nanowires were synthesized by using the chemical vapor deposition method. They all consist of a single-crystalline wurtzite CdS structure with a [010] or [011] growth direction. The X-ray diffraction pattern reveals the contraction of the lattice constants due to the incorporation of Mn. The Mn…
A series of donor--bridge--acceptor (D--B--A) systems with varying donor-acceptor distances have been studied with respect to their triplet energy transfer properties. The donor and acceptor moieties, zinc(II), and free-base porphyrin, respectively, were separated by 2-5 oligo-p-phenyleneethynylene units (OPE) giving…
Thick or thin? Hydrogen-bonded bis-urea forms two distinct rodlike assemblies—thick or thin filaments—in a variety of aromatic solvents. The stability of each is dependent on the size of the solvent molecules and a simple viscosity test (see figure) differentiates between them.
Branching out: Pd-catalyzed iterative triarylations of vinylboronate afford conjugated dendrimers with triarylethene branches (see picture) in a flexible and convergent manner. These highly branched dendrimers reveal good solubility in common organic solvents and exhibit high quantum yields of fluorescence, with the c…
A hierarchical structure of mesoporous−macroporous phosphated aluminum (oxyhydr)oxide (PAl) materials was prepared via a simple self-assembly process with the use of precursor aluminum sec -butoxide in a mixed solution of H 3 PO 4 and Na 2 HPO 4 . Direct phosphation resulted in the incorporation of phosphorus into the…
We report the resonant Raman spectra of individualized $(=debundled)$ single-walled carbon nanotubes (SWNTs) having diameters $d\ensuremath{\sim}0.8--1.3\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ subject to compression up to $10.5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. Both SWNTs in water-surfactant dispersions as well…
A full range of ${\mathrm{SrRu}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3}$ perovskite solid solutions $(0<x<1)$ has been prepared using high temperatures and pressures up to $10.5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The structure changes from orthorhombic Pbnm at low $x$ through a previously unre…
We report experimental evidence for the charge-orbital ordering in magnetite below the Verwey transition temperature T(V). Measurements of O K-edge resonant x-ray scattering on magnetite reveal that the O 2p states in the vicinity of the Fermi level exhibit a charge-orbital ordering along the c axis with a spatial per…
The effect of specimen size on the uniaxial deformation response of planar single crystals and polycrystals is investigated using discrete dislocation plasticity. The dislocations are all of edge character and modelled as line singularities in a linear elastic material. The lattice resistance to dislocation motion, di…
Long-term memory aid: A one-handed helical poly(phenylacetylene) with positively charged pendant groups can serve as the template for supramolecular helical arrays of achiral porphyrins with opposite charges in acidic water. The supramolecular chirality induced in the porphyrin aggregates can be memorized even after t…