Materials Literature
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Abstract The production of hydrogen and synthesis gas (syngas) from methane is a key technology for the twenty‐first century. It is currently performed predominantly by steam reforming of methane. An alternative reaction route is the direct catalytic partial oxidation of methane (CPOM) at high‐temperature, short conta…
Near-resonant optical pumping was used to modulate third-order susceptibility χ(3) in disperse red 1 doped poly(methylmethacrylate) thin films. An optically pumped degenerate four-wave mixing (DFWM) experiment was conducted to examine the photoreactive phase conjugation (PC) signals. Experimental results indicated a l…
Abstract Supramolecular polyurethane complexes based on a polyurethane with a pendant pyridyl unit (PUPy) as the hydrogen bond acceptor and 4‐octyloxybenzoic acid (OOBA) or 4‐butyloxybenzoic acid (BOBA) as the hydrogen bond donor were prepared. The primary driving force for the formation of these complexes is the hydr…
The effect of $\mathrm{Co}$ doping on transport and magnetic properties of bilayered manganite ${\mathrm{LaSr}}_{2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ charge ordering (CO) state is first investigated. With $\mathrm{Co}$ doping, CO and metal-insulator transition disappear and the resistivity behaves as semiconducting be…
Four up, four down: Reductive alkylation of cyclo[8]pyrrole and its derivatives gives rise to the corresponding reduced per-N-alkylated products, a reaction unknown in the case of porphyrins. These bowl-like molecules are arranged with four substituents up and four substituents down in a well-defined alternating fashi…
Stationary phase cells of the halophilic archaea Halobacterium salinarium and Halorubrum distributum, growing at 3-4 M NaCl, and of the halotolerant bacterium Brevibacterium antiquum, growing with and without 2.6 NaCl, took up approximately 90% of the phosphate from the culture media containing 2.3 and 11.5 mM phospha…
Laser ablated Cr-doped TiO2 thin films grown on LaAlO3 substrates are single phased anatase and room temperature ferromagnetic. The magnetic moment of Cr-doped TiO2 films is rather large, and it is consistent with the theoretical predictions. Magnetic force microscopy measurements certainly suggested that the strong f…
The crystallization behavior of amphiphilic ionic imidazolium liquid crystals has been studied with in situ small- and wide-angle X-ray scattering. We found that below the melting point four crystal phases exist. Their relative stability is checked by investigating the mutual transitions and using a heating scan. The…
A highly saddle-distorted dodecaphenylporphyrin dication (H4DPP2+) was revealed by X-ray crystallography to form positively charged porphyrin nanochannels which were 1 nm in diameter; chloride anion and redox-active hydroquinone could be incorporated in the channels.
Rot, weiß und blau: Weißes Licht resultierte aus dem partiellen Energietransfer (∂ET) zwischen einem blau emittierenden IrIII-Phenylpyridin-Komplex und einem rot emittierenden EuIII-Terpyridin-Chelat, wenn das aus den beiden Metallkomplexen gebildete Assoziat angeregt wurde (siehe Bild).
In the present work, mechanical response, water uptake, and dielectric properties of jute fiber-reinforced polypropylene (PP) composites are studied. Uniaxial tensile and Izod notched tests are conducted for a range of fiber volume fraction. It was found that the tensile Young’s modulus and tensile strength monotonica…
The novel heterometallic complex [Cu(4)(NH(3))(4)(HL)(4)][CdBr(4)]Br(2).3dmf.H(2)O has been prepared in the reaction of zerovalent copper with cadmium oxide in the air-exposed solution of ammonium bromide and diethanolamine (H(2)L) in dimethylformamide (dmf). The compound is monoclinic, with space group P2(1)/c, a = 1…
The reaction of 1/3 equivalent of CuCl2.2H2O with MnCl2.4H2O and 5-bromo-2-salicylideneamino-1-propanol (H(2)5-Br-sap) in methanol gave dark brown crystals of [MnIIICuIICl(5-Br-sap)2(MeOH)] (1). Complex 1 has an alkoxo-bridged dinuclear core of MnIII and CuII ions, which have elongated octahedral and square-planar coo…
The dielectric constant and ac conductivity have been measured for the layered organic conductor theta-(BEDT-TTF)_2CsZn(SCN)_4 along the out-of-plane direction, which show a relaxation behavior similar to those in the charge-density-wave conductor. Most unexpectedly, they exhibit a large bias dependence with a hystere…
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1 T -VSe 2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points show…
Abstract For Abstract see ChemInform Abstract in Full Text.
Different techniques used for the mass coloration of polyester fibers are discussed in this article. Dope-dyed fibers have been produced starting from PET bottle wastes. Dope dyeing has been carried out both by the incorporation of pigments during drying before melt extrusion and by masterbatch addition. Fibers produc…
Nanocomposites of a bifunctional epoxy resin are synthesized and evaluated. Organically modified layered silicate (OLS) particles (4% by weight) and multiwalled carbon nanotubes (MWNT) (1% by weight) are used as reinforcements. Thermal and viscoelastic characterization of the two composites are performed and compared…
The out-of-plane thermal conductivity $({\ensuremath{\kappa}}_{c})$ of ${\mathrm{Bi}}_{2\ensuremath{-}x}{\mathrm{Pb}}_{x}{\mathrm{Sr}}_{2}{\mathrm{Co}}_{2}{\mathrm{O}}_{y}$ is measured and analyzed. A low value of $4--8\phantom{\rule{0.3em}{0ex}}\mathrm{mW}∕\mathrm{cm}\phantom{\rule{0.2em}{0ex}}\mathrm{K}$ is observed…
For degradation of chitosan, chitosan with an 80% degree of deacetylation and a weight-average molecular mass (Mw) of approx. 48 kDa was irradiated with gamma-rays at doses up to 200 kGy in a 10% (w/v) solution. The Mw of chitosan was reduced from 48 to 9.1 kDa by irradiation. The characteristics of irradiated chitosa…