Materials Literature
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We have investigated the interplay between disorder and ferromagnetism in ${\mathrm{III}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{V}$ semiconductors. Our study is based on a model in which $S=5/2$ Mn local moments are exchange coupled to valence-band holes that interact via Coulomb interactions with each other, wit…
Anodic oxidation of tetraspirobifluorene-manganese porphyrin lead to the coating of the working electrode by insoluble electroactive poly(9,9'-spirobifluorene-manganese porphyrin) films for which electrochemical behaviour and physicochemical properties are described; these polymeric materials are able to catalyze the…
Beta-unsubstituted meso partially free N-confused porphyrin, N-confused 5,20-diphenylporphyrin (NCDPP, 3), was synthesized in 7% yield by [3 + 1] condensation reaction followed by oxidation. The structures of the free base and its Ag(III) complex were elucidated by the single-crystal X-ray analyses. The Ag(III) comple…
Abstract A high mordenite product was obtained from a natural raw material, diatomite, either with or without the presence of diethanolamine. The synthesis process took 2 days, and was carried out under hydrothermal conditions, at autogenic pressure, and at a temperature of 180 °C. The resulting crystals were identifi…
Abstract All‐polypropylene (PP/PP) composites, consisting of homoisotactic PP fibers and a propylene–ethylene random copolymer matrix, were manufactured. The interfacial morphologies and mechanical deformation of the composites were investigated. It was found that a transcrystalline layer was formed in the matrix depe…
The destabilization of confined ultrathin poly(styrene- block -paramethylstyrene) films with a fully deuterated polystyrene block in the strong segregation limit is investigated. Using the spin-coating technique, polymer films with thicknesses smaller than the radius of gyration of the unperturbed polymer molecule wer…
Abstract For Abstract see ChemInform Abstract in Full Text.
Gold nanoparticles, modified with alkyl thiol, formed a film on polystyrene substrate, and it was found that the deposited film drastically changes its conductivity and hydrophobicity, depending on the alkyl chain length of the thiol used.
Stabilisation and reactions of radical cations produced by irradiation of various aliphatic molecules (ethers and carbonyl compounds) in argon matrices in the presence of electron scavengers at 10–16 K were studied by EPR. It was found that the relative yield of trapped radical cations depended strongly on the chemica…
Density functional theory has been used to study the effects of solvent coordination on the reactivity of titanium hydroperoxo complexes in the epoxidation of the model olefin ethylene. Complexes possessing a variety of coordination environments have been modeled with unconstrained single coordination sphere clusters…
The Shubnikov--de Haas effect in quasi-two-dimensional normal metals is studied. The interlayer conductivity is calculated using the Kubo formula. The electron scattering on short-range impurities is considered in the self-consistent Born approximation. The result obtained is given in the analytical form, that allows…
The formation of the shell of Biomphalaria glabrata was studied in dissected embryos and egg masses with scanning electron microscopy, electron spectroscopic imaging (ESI), thermogravimetry, synchrotron powder diffraction and Ca K-edge X-ray absorption spectroscopy (EXAFS). The results show that shell formation starts…
Abstract The objective of the study is to elucidate the effect of reaction time and temperature during heterogenous alkali reaction on degree of deacetylation (DD) and molecular weight (MW) of the resulting chitosans, and to establish the reaction conditions to obtain desired DD and MW chitosan products. Chitin was ex…
Abstract The effects of polyethylene‐grafted maleic anhydride (PE‐g‐MA) on the thermal properties, morphology, and tensile properties of blends of low‐density polyethylene (LDPE) and corn starch were studied with a differential scanning calorimeter (DSC), scanning electron microscope (SEM), and Instron Universal Testi…
We present a microscopic theory of proximity effect in the ferromagnet/superconductor/ferromagnet (F/S/F) nanostructures where S is s-wave low-T_c superconductor and F's are layers of 3d transition ferromagnetic metal. Our approach is based on the solution of Gor'kov equations for the normal and anomalous Green's func…
Merits of using advanced oxidation processes such as sonolysis and photocatalysis as well as a combination of the two have been explored using model herbicides such as 2,4-dichlorophenoxy acetic acid and 2,4-dichlorophenoxypropionic acid and the chlorinated phenols 2,4-dichlorophenol and 2,4,6-trichlorophenol. Whereas…
Abstract New types of polyurethanes were prepared by reacting soybean oil‐based polyol and different isocyanates. The polyurethanes can be used as foams, elastomers, coatings, adhesives, etc. Their properties strongly depend on crosslinking density and the structure of isocyanates. Aromatic triisocyanates impart the h…
A physically interesting {\it effective rest mass} of photons in electromagnetic media, which is independent of wave frequency $ω$, is defined in the present paper. It is verified that this frequency-independent effective rest mass of photons can be easily read off from the optical refractive index squared $n^{2}(ω) $…
We have synthesized two new interstitial compounds (RPd3)8Mn (R = La and Ce). The Mn ions present in "dilute" concentration of just 3 molar percent form a sublattice with an unusually large Mn-Mn near neighbor distance of ~ 85 nm. While the existence of (RPd3)8M (where M is a p-block element) is already documented in…
Self-assembled Ge islands were grown on stripe-patterned Si (001) substrates by solid source molecular beam epitaxy. The surface morphology obtained by atomic force microscopy (AFM) and cross-sectional transmission electron microscopy images (TEM) shows that the Ge islands are preferentially grown at the sidewalls of…