Materials Literature
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The magnetic long range ordering (LRO) and short range ordering (SRO) in β-MnO 2 has been studied by neutron powder diffraction. Below T N =92.5(1) K β-MnO 2 has an incommensurate modulated magnetic LRO with temperature dependent propagation vector length k z . The values of k z show a maximum, corresponding to k z =…
The reactivity of atomic cobalt toward molecular oxygen in rare gas matrices has been reinvestigated. Experiments confirm that Co atoms in their a(4)F ground state are inert toward O(2) in solid argon and neon but reactive in the b(4)F first excited state, in agreement with the previous gas-phase study of Honma and co…
Unlike general fluorination, amorphous fluorinated carbon (a-C:F) nanostructures have been synthesized directly and efficiently by an electron cyclotron resonance chemical vapor deposition (ECR–CVD) system using a mixture of C2H2, CF4, and Ar as precursors. The electron field-emission properties of the a-C:F nanostruc…
BACKGROUND: Nephrogenic fibrosing dermopathy (NFD) is a new skin-fibrosing disorder associated with renal dysfunction. It is marked by the acute onset of induration involving the upper and lower limbs, and it is characterized by distinctive histopathologic findings. METHODS: We report the case of a patient on hemodial…
Neutron diffraction measurements have been performed on a single crystal of TbMn 2 O 5 to elucidate the interplay between magnetic ordering and ferroelectricity. On cooling below T N1 = 42 K, the system enters a lock-in commensurate magnetic (CM) state with the magnetic propagation vector q = (1/2,0,1/4) from a two-di…
A series of chiral, chromophore-functionalized donor-embedded polybinaphthalenes were prepared by a Stille coupling reaction between a diiodo-functionalized chromophore and a bis(trimethyltin)binaphthalene derivative. The optical purity of the chiral binaphthalene monomer was varied, and its influence on the conformat…
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…