Materials Literature
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Alles gut verpackt: Kohlenstoff-umhüllte Metall-Nanopartikel, mit Metall-Nanopartikeln versehene Kohlenstoff-Mikrokügelchen sowie schichtförmig aufgebaute Partikel sind durch eine auf hydrothermaler Behandlung von Glucose basierende Methode zugänglich. Hierbei resultieren monodisperse kolloidale Kohlenstoff-Mikrokügel…
In transition metal oxides, preferential occupation of specific d orbitals on the transition metal ion can lead to the development of a long-range ordered pattern of occupied orbitals. This phenomenon, referred to as orbital ordering, is usually observed indirectly from the cooperative Jahn-Teller distortions (CJTDs)…
All wrapped up: Carbon-encapsulated metal nanoparticles, carbon microspheres decorated with metal nanoparticles, and particles with layered structures are all accessible by means of a method based on hydrothermal treatment of glucose, which produces monodisperse colloidal carbon microspheres with reactive surfaces. Th…
Polychromophores comprised of rigid−flexible alternating polyethers have been synthesized. In these polymers, the rigid part of the main chain is a quinquephenyl fluorophore decorated with two second generation Fréchet-type side dendrons, while the flexible part is an aliphatic chain of 11 or 12 methylene groups. The…
Abstract Two novel polystyrene‐supported Schiff bases, PSOPD and PSHQAD, were synthesized. A polymer‐bound aldehyde was condensed with o ‐phenylenediamine to prepare the Schiff base PSOPD, and a polymer‐bound amine was condensed with 3‐hydroxyquinoxaline‐2‐carboxaldehyde to prepare the Schiff base PSHQAD. This article…
Comparison of the polarizabilities and hyperpolarizabilities obtained from finite basis set and finite difference Hartree–Fock calculations for diatomic molecules: II. Refinement of basis sets and grids for hyperpolarizability calculations, J Kobus, D Moncrieff, S Wilson
Sugar-based gelator p-dodecanoyl-aminophenyl- <TEX>${\beta}$</TEX>-D-aldopyranosides (1-3) have been shown to self-assemble in the presence of p-aminophenyl aldopyranosides. The hydrogel 1+4 showed the double-helical structure with 3-25 nm outer diameters, which is quite different from that of 1. The gel 2+5 revealed…
Thin-film filters used for dense wavelength division multiplexing (DWDM) applications are processed by a variety of deposition techniques, including ion-beam sputtering. Ion-beam sputtering produces high-quality coatings and provides flexibility of coating materials. However, DWDM filters consisting of oxide films tha…
Abstract Interfacial agents are often used to compatibilize immiscible polymer blends. They are known to reduce the interfacial tension, homogenize the morphology, and improve adhesion between phases. In this study, two diblock copolymers of styrene/ethylene‐propylene (SEP), which have different molecular weights, wer…
A novel laser beam guided patterning technique for deposition of nanoparticle clusters of various materials on movable substrates and fabrication of microstructures is described. An example of the technique's application, the fabrication of gold microstrips of under 100−150 μm in width, is discussed. Microstrip patter…
The peptides (AG)(6)(VPGVG)(AG)(7) and (AG)(5)(VPGVG)(2)(AG)(5) are models for a new type of protein with both composition and properties such as Bombyx mori silk and elastin. In this paper, we report the solid-state NMR results for these samples and related peptides; the structures after dialysis of the 9 M LiBr aque…
Abstract Water soluble polyurethanes (WSPU)s have been prepared by polycondensation of isophorondiisocyanate and tolylene‐2,4‐diisocyanate with poly(ethylene glycol)s (PEGs) of molecular weights 400, 600, and 1,000. The physicochemical properties of the WSPUs depend on the hydrophilic–hydrophobic balance in their poly…
Abstract Porous polymeric materials can be prepared by using micromechanical deformations. The development of porous structures in the tension of polyolefin blends are studied with the goal of developing a novel technique to make porous films. It is found in polypropylene/polyethylene copolymer blends of near 50/50 we…
Abstract A series of monomeric azobenzene derivatives of 6‐(4‐nitro‐4′‐oxy‐azobenzene acrylate with carbon numbers of 6 and 11, and the chiral monomer of bornyl 4‐(6‐acryloyloxyhexyloxy)‐phenyl‐4′‐benzoate were synthesized. Chiral polymers having bornyl group end‐capped pendants with azobenzene‐derived segments were p…
Abstract Fractionated crystallization behavior of dispersed PA6 phase in PP/PA6 blends compatibilized with PP‐ g ‐MAH was investigated by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), polarized light microscopy (PLM), and wide‐angle X‐ray diffraction (WAXD) in this work. The lack of usua…
Abstract CuCl und GaCl 3 reagieren in THF mit Se(SiMe 3 ) 2 in Anwesenheit von PEt 2 Ph zu [Cu 20 Ga 10 Cl 4 Se 23 (PEt 2 Ph) 12 ] ( 1 ). Die Reaktion von CuCl, InCl 3 und TMEDA mit i PrSeSiMe 3 führt in DME zur Bildung von [Cu 14 In 6 Se 7 ( i PrSe) 18 ] ( 2 ). Die Strukturen der Verbindungen 1 und 2 konnten durch Ei…
Aqueous solutions that contained 400–1,000 mg/L of ammonia were oxidized in a trickle-bed reactor in this study of copper–lanthanum–cerium composite catalysts, which were prepared by the co-precipitation of copper nitrate, lanthanum nitrate and cerium nitrate at various molar concentrations. Results revealed that the…
We carried out a unique comparative study between three modes of cryo-scanning electron imaging: high-vacuum, low-voltage and low-vacuum, using ice cream as a model system. Specimens were investigated both with and without a conductive coating (Au/Pd) and at temperatures for which ice either remains fully frozen (< -1…
Abstract The synthesis and self‐polyaddition of the optically active monomers I‐T( L )‐M and I‐T( D )‐M bearing both isocyanate and hydroxyl groups were examined. I‐T( L )‐M and I‐T( D )‐M were synthesized by reactions of L ‐ and D ‐tyrosine methyl ester, T( L )‐M and T( D )‐M, with di‐ tert ‐butyltricarbonate, respec…
Abstract Polypyrrole (PPy) films doped with arylsulfonate dopants were prepared by electrochemical polymerization, to investigate the effects of various dopants on conductivities, thermal stabilities, and morphologies of PPy films. Also, HCl was added to those dopants as a cooperating dopant, to improve conductivity o…