Materials Literature
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Elliptically shaped (Pb1–xCdx)S nanoparticles (NPs) of average size 2.3 × 2.9 nm (minor axis × major axis) have been prepared via reaction of a solid [oligo(p-phenylene-ethynylene) dicarboxylate]Pb0.9Cd0.1 salt matrix, with gaseous H2S. A significantly long emission lifetime, with multi-exponential behavior, is detect…
Die vierkernigen Peroxo-Komplexe [Ln4(O2)2Cl8(Py)10]·Py mit Ln = Sm (1·Py), Eu (2·Py) und Gd (3·Py) entstehen als blaßgelbe (1·Py) und farblose (2·Py und 3·Py) Kristalle durch Einwirkung von Luftsauerstoff auf zuvor erhitzte Lösungen der wasserfreien Trichloride LnCl3 in Pyridin/Diacetonalkohol (4-Hydroxy-4-methyl-2-p…
Abstract Cationic dyeable poly(ethylene terephthalate) (CD‐PET) was formed by copolymerizing dimethylterephthalate (DMT),5‐sodium sulfonate dimethyl isophthalate (SIPM) with a molar ratio of 2% and ethylene glycol (EG). Blends of regular poly(ethylene terephthalate) (PET) and CD‐PET were spun into hollow fibers. The f…
1H Magic Angle Spinning (MAS) NMR and 1H T1 and T1ρ relaxation times measurements were used to investigate structural aspects of gel derived glasses of composition 10P2O5·90SiO2 (10P) and 30P2O5·70SiO2 (30P), with the aim of understanding the different humidity sensitive behaviour observed for films of the same compos…
Molecular dynamics simulations have been made of a collapsing bubble or cavity in a simple liquid. Simulations of a Lennard-Jones liquid reveal that the collapsing process takes place in a series of stages. First, the ‘hottest’ molecules from the high kinetic energy tail in the Maxwell—Boltzmann distribution diffuse i…
Abstract A series of aqueous polyurethane dispersions containing pendant carboxylate anion as the hydrophilic were synthesized, and the particle size and the mechanical properties of the dispersions were measured. The effects of the molar ratio of NCO/OH groups or the other functional groups on the chemical structure…
Gold nanoparticles were prepared in an aqueous solution and a 50:50 N -methyl-2-pyrrolidone (NMPD)/toluene mixed solvent using o -anisidine as the reducing agent, respectively. The reaction is conducted by choice of the temperature and medium. Transmission electron microscopy (TEM) and UV−vis absorption spectroscopy m…
A free energy model for the processing of polyelectrolyte multilayer (PEM) films via layer-by-layer assembly is developed for polyelectrolyte components of pH-tunable charge density, allowing for the prediction of cumulative thickness as a function of number of deposited layers, as well as the hydrated layer thickness…
Abstract The dynamic rheological behavior of high‐density polyethylene (HDPE) composites filled with carbon black (CB) was studied by controlling periodic small shear strains at constant temperatures. The results shed light on the relationship between the behavior of dispersed fillers and polymeric matrix systems. At…
The new compounds K6Nb4S22 and K6Ta4S22 (I) have been synthesised by the reaction of NbS2 or Ta metal in a K2S3 flux. Using TaS2 as educt a second modification of K6Ta4S22 (II) is obtained. K6Nb4S22 and K6Ta4S22 (form I) crystallise in the monoclinic space group C2/c with a = 35.634 (2)Å, b = 7.8448 (4)Å, c = 12.1505…
Abstract The effects of compatibilization on the toughening of polypropylene (PP) by melt blending with styrene/ethylene‐butylene/styrene tri‐block copolymer (SEBS) in a twin‐screw extruder were investigated. The compatibilizers used were SEBS functionalized with maleic anhydride (SEBS‐g‐MA), PP functionalized with ac…
Abstract Interpenetrating polymer networks (IPNs) of polydimethylsiloxane (PDMS) and poly(2‐hydroxyethyl methacrylate) (PHEMA) were prepared by sequential method. The dynamic mechanical parameters of obtained IPNs and their variations with the structural composition were evaluated. The results for the IPNs were compar…
Wir beschreiben Synthese und Kristallstrukturen von fünf neuartigen Eisen/hpdta-Komplexen [{FeIII4(μ-O)(μ-OH)(hpdta)2(H2O)4}2FeII(H2O)4]·21H2O (2), (pipH2)2[Fe2(hpdta)2]·8H2O (4), (NH4)4[Fe6(μ-O)(μ-OH)5(hpdta)3]·20, 5H2O (5), (pipH2)1, 5[Fe4(μ-O)(μ-OH)3(hpdta)2]·6H2O (7), [{Fe6(μ3-O)2(μ-OH)2(hpdta)2(H4hpdta)2}2]·py·50…
New cadmium chalcogenide cluster molecules [Cd10E4(E'Ph)12(PnPr3)4], E = Te, E' = Te (1) and [Cd10E4(E'Ph)12 (PnPr2Ph)4] E = Te, E' = Se (2); E = Te E' = S (3); E = Se, E' = S (4) have been synthesized and structurally characterized by single crystal X-ray structure analysis. The influence of the variation of the chal…
An analysis of the elastic properties of syndiotactic polypropylene at different temperatures is reported. Fibers stretched at low temperatures are in the trans -planar form III, which transforms into the helical form II upon the release of the tension, whereas fibers stretched at high temperatures are in the stable h…
The goal of this work is to define the structural and sequence features common to sandwich-like proteins (SPs), a group of very different proteins now comprising 69 superfamilies in 38 protein folds. Analysis of the arrangements of strands within main sandwich sheets revealed a rigorously defined constraint on the sup…
We study nanograin size confinement effects, and the effect of the increase of local temperature on the first-order Raman spectrum in silicon nanogranular films obtained by cluster deposition. The local temperature was monitored by measuring the Stokes/antiStokes peak ratio with the laser power up to $\ensuremath{\sim…
Electrooxidation of the nickel dithiolene complex [Ni(F2pdt)2]–· (F2pdt2-: 6,6-difluoro-6,7-dihydro-5H-[1,4]dithiepine-2,3-dithiolato) affords the corresponding neutral complex [Ni(F2pdt)2]0 whose layered structure is highly reminiscent, albeit not isostructural, of that of the isosteric fluorinated bis(propylenedithi…
Derbe, gelblichgrüne Einkristalle des ternären Kupfer(I)-Praseodym(III)-Sulfids CuPrS2 entstehen bei der Umsetzung der Elemente (Kupfer, Praseodym und Schwefel) im molaren Verhältnis von 1:1:2 innerhalb von sieben Tagen bei 800°C in evakuierten Quarzglasampullen, wenn äquimolare Mengen an CsCl als Flußmittel zugegen s…
Abstract Poly(ethyl acrylate) (PEA)/SiO 2 hybrids with different compositions were prepared under different casting temperatures and pH values. Their morphology as investigated by transmission electron microscopy (TEM) shows that samples with different compositions have different morphologies. When the SiO 2 content i…