Materials Literature
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Abstract Synthesis and Structure of the Basic Alkaline Earth Nitrates Sr 2 (OH) 3 NO 3 and Ba 2 (OH) 3 NO 3 Sr 2 (OH) 3 NO 3 and Ba 2 (OH) 3 NO 3 were synthesized from mixtures of freshly prepared strontium or barium hydroxides and their corresponding nitrates in evacuated quartz glass ampoules at 420 °C and 360 °C, r…
Abstract A novel process consisting of a pulsed streamer discharge over Ni/HZSM‐5 catalysts for an oxygen‐free conversion of methane to aromatics is reported here. This plasma‐over‐catalyst process shows a significant synergetic effect on promoting methane conversion to aromatic products and high stability. Using this…
Abstract A novel poly( p ‐phenylene) ( 6 ) has been synthesized by a cruciform combination of a polyphenylene backbone with 2,2′‐( p ‐phenylene)‐bis(4,5‐diphenylimidazole) ( 5 ) as an additional, orthogonal chromophore. Polymer 6 showed in solution and in the solid state, a blue‐green emission, which is obviously aris…
Abstract Powder samples of the ternary phosphates A 3 Lu(PO 4 ) 2 :Yb 3+ (A = Na, Rb) have been synthesised by solid state reactions. The spectroscopic properties of Yb 3+ in double phosphate host lattices were investigated using absorption, emission and excitation spectra at 4, 10 and 293 K in the VUV to IR range. Th…
The determination of optical constants from spectra of low-symmetry single crystals or from spectra stemming from unfavorable crystal faces by dispersion analysis is a difficult task. Besides oscillator frequencies, band positions can additionally depend on oscillator strength as well as on the relative orientation of…
Abstract Hybrid organic–inorganic films were prepared using four different hydroxylated soybean oils (HSO) or epoxidized soybean oil as organic precursor and tetraethyl orthosilicate (TEOS) as inorganic precursor in a mass ratio of HSO:TEOS of 90:10. The films were macroscopically homogeneous and were characterized by…
Abstract Micron‐sized CaCO 3 particles free of milling additives were coated with a monolayer of aliphatic carboxylic acids of different chain length (C2, C4, C5, C10, and C18). CaCO 3 was compounded with LDPE at different loading, and the tensile properties of the composites were measured and correlated to the length…
Abstract Polyaniline nanostructures (nanosheets, nanofibers, and nanoparticles) can be assembled at the organic/aqueous interface or in solution by controlling the diffusion rate and the polymerization induction time of aniline. The quality of polyaniline nanostructures is determined by the polymerization solution con…
Abstract Conceptual design and experimental investigations are integrated for synthesizing diastereomeric salt crystallization processes for chiral resolution. An anti‐inflammatory drug ibuprofen and a common resolving agent N‐methyl‐ D ‐glucamine were chosen to illustrate this integrative approach. Bench data were ge…
Abstract Two different kinds of HBPs were used in the preparation of nanocomposite materials based on TiO 2 nanoparticles. One of the HBPs was characterized by the presence of free OH end groups in its structure, while the other one was obtained via a partial modification reaction which allowed to introduce some alkox…
The structural, electronic, and magnetic properties of the $\mathrm{MnO}(100)$ and (110) surfaces were studied within the standard approximation of Perdew, Burke, and Ernzerhof (PBE) and the $\mathrm{PBE}+U$ approach. For the (100) surface, the surface layers relax inwards for both sets of calculations. For the (110)…
Abstract Two new organically templated borates, [H 2 DAB][B 7 O 9 (OH) 5 ]·2H 2 O ( 1 ) and [H 2 DAB][B 7 O 10 (OH) 3 ] ( 2 ), have been synthesized under mild conditions in the presence of DAB acting as structure‐directing agent (DAB = 1,4‐diaminobutane). The structures were determined by single crystal X‐ray diffrac…
In this paper, the vibrational behavior of the multiwalled carbon nanotubes (MWCNTs) embedded in elastic media is investigated by a nonlocal shell model. The nonlocal shell model is formulated by considering the small length scales effects, the interaction of van der Waals forces between two adjacent tubes and the rea…
The green form of ‘<em>Glenodinium sanguineum</em> Marchesoni' <em>sensu</em> Baldi was investigated in detail by light microscopy, scanning electron microscopy, transmission electron microscopy and by analysis of the SSU- and LSU rDNA genes. These data demonstrated it to be different from the red form of ‘<em>G. sang…
Abstract In the present study, the content of diadinoxanthin (Dd) + diatoxanthin (Dt) in the diatom Phaeodactylum tricornutum was manipulated by low-light (LL) and high-light (HL) growth conditions. Cells grown in HL almost doubled the pool size of Dd cycle pigments compared to cells from a LL culture. HL-grown cultur…
The low-frequency dynamics in glasses is compared with that in icosahedral quasicrystals. For both arrangements of matter, the existence of nanometric heterogeneities, implying the existence of a nanometric inhomogeneous elastic network, is expected to play a crucial role. Thanks to this comparison, mostly based on in…
The crystal structure of the low-temperature form of anhydrous caffeine has been determined by using X-ray powder-diffraction data with a combined simulated-annealing/Rietveld method. Anhydrous caffeine crystallizes with five crystallographically independent molecules in a monoclinic C-centred unit cell with dimension…
Abstract To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted organic ions. With increasing len…
Abstract Molecular brushes, with side chains consisting of two copolymers: 2‐(dimethylamino)ethyl methacrylate with methyl methacrylate, and N,N ‐dimethylacrylamide with butyl acrylate were prepared by grafting‐from via atom transfer radical polymerization (ATRP). Poly(2‐(2‐bromoisobutyryloxy)ethyl methacrylate) and p…
The effects of both organically modified montmorillonite (OMMT) and Ni(2)O(3) on the carbonization of polypropylene (PP) during pyrolysis were investigated. The results from TEM and Raman spectroscopy showed that the carbonized products of PP were mainly multiwalled carbon nanotubes (MWNTs). Surprisingly, a combinatio…