Materials Literature
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Slow diffusion of aqueous solutions containing K4[MoIII(CN)7]·2H2O and a MnII salt, respectively, affords well shaped single crystals of two cyano-bridged bimetallic phases ordering ferromagnetically with a pronounced magnetic anisotropy in the magnetically-ordered phase.
Modified Mg–Al hydrotalcite (Mg:Al = 3:1) prepared by thermal decarbonation followed by rehydration of a conventional Mg–Al hydrotalcite is found to be a highly active, reusable and air stable catalyst for cyanoethylation of alcohols.
The reaction of ethanolic/water solutions of NiX 2 ·6H 2 O (X = NO 3 -, ClO 4 - ), bidentate amine N,N,N‘,N ‘-tetramethylethylenediamine (tmen) and N,N,N ‘-trimethylethylenediamine (trimen) with [Cu(oxpn)] (oxpn = N, N ‘-bis(3-aminopropyloxamide) and ammonium thiocyanate, in the presence of ammonium hexafluorophosphat…
1. INTRODUCTION 1.1. Background Schlenk was the first to use the term inclusion compound (IC) to describe the crystalline adducts in which one component (host molecule) crystallizes into a matrix, isolating the second component (guest molecule) into cavities of well-defined geometry [1]. Most of the ICs reported have…
Summary: The growth behaviour of Alcaligenes eutrophus on phenol was investigated in continuous cultures to identify the phenomena limiting both growth efficiency and substrate degradation rates. It was shown that the fixed stoichiometry of the meta pathway of phenol degradation, leading to equimolar quantities of pyr…
A Cu/ZrO2 (1 wt.% Cu) catalyst shows high activity for the NO–CO reaction, even at low temperature (100–200 °C). However, the low-temperature activity is easily lost during prolonged reaction at 250 °C. The activity of the deactivated Cu/ZrO2 catalyst is completely restored by NO treatment (1% in He) at >250 °C or O2…
New types of π-electron donors and acceptors with high polarizability are reviewed. TTF derivatives with polarizable substituents, π-extended TTF analogues fused with nitrogen-containing heterocycles and non-TTF donors (i.e. electron donors) and chalcogen atom-containing quinones, TCNQ and DCNQI analogues (i.e. electr…
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The low-field magnetization $M$ and susceptibility \ensuremath{\chi} are reported for the two-layered Ruddleson-Popper phase ${\mathrm{S}\mathrm{r}\mathrm{O}(\mathrm{L}\mathrm{a}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}{)}_{2}\mathrm{ }\mathrm{for}\mathrm{ }x=0.4$ (denoted ${\mathrm{La}}_{1.2}{\mathrm{Sr…
The redox behaviour of polypyrrole layers prepared by the electrochemical oxidation of pyrrole in acetonitrile solutions was studied using insitu EPR/UV–VIS spectroelectrochemistry. Various supporting electrolytes: p-toluene sulfonic acid, tetrabutylammonium perchlorate (TBAP) and tetraethylammonium p-toluene sulfonat…
The [2+4]cycloaddition of the novel A4B building block 2,3,4,5-tetrakis(4-triisopropylsilylethynylphenyl)cyclopenta-2,4-dienone 3 with 3,3’,5,5’-tetraethynylbiphenyl 1 allows the rapid synthesis of a spherical polyphenylene nanoparticle with 102 benzene rings.
ZnS nanocrystallites effectively enhanced photo-reduction of chlorinated benzene derivatives in the presence of triethylamine as a sacrificial electron donor under UV irradiation (λ > 300 nm), leading to selective and stepwise dechlorination to give benzene at the final stage.
Structure and reactivity of cellulose structure and properties swelling and dissolution degradation heterogeneous and homogeneous reactions analytical methods.
This paper deals with the flashover mechanism and performance of contaminated nonceramic (also known as composite and polymeric) outdoor insulators under wet conditions. Two types of wetting that occur in service, namely fog and rain, were considered. Different profiles of line insulators having weathersheds made from…
Syntheses of nanometer scale, directly beta-fused oligoporphyrins sharing an extended π-system are described.
The first banana-shaped molecules without Schiff-base units, with broad regions of a ferroelectric switchable liquid crystalline phase and low melting points, have been obtained.
Cadmium sulfide nanoparticles have been produced in situ in aqueous solution at room temperature by precipitating Cd2+ ions with homogeneously released S2– ions, which were generated from the decomposition of Na2S2O3 by γ-irradiation.
Cruciform porphyrin pentamers 15 and 16 are obtained in good yield by acid-catalyzed tetramerization of ZnII–pyrroloporphyrin 14, followed by oxidation with DDQ; pyrroloporphyrins are in turn obtained from the corresponding pyrrolochlorins by Diels–Alder type reactions of porphyrins involving thermal extrusion of sulf…
An yttrium aluminium oxide dodecyl sulfate mesophase with a hexagonal structure has been synthesized by a homogeneous precipitation method using urea and was converted into a porous material with a specific surface area of 662 m2 g–1 by anion exchange of the surfactant with acetate ion.
A study of the structure-property relationships in a series of 3-(4-n-decyloxyphenyl)-1-(p-X-phenyl)-2-pyrazolines has been performed. By simply changing the substituent in the 1-phenyl ring we were able to tune the physical properties of the compounds. If this ring is non-substituted or substituted with a 4-methoxy,…