Materials Literature
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This work evaluates the sorption potential of an hydrotalcite compound [Mg3Al(OH)8]2CO3H2O, HT, and its calcined product Mg3AlO4(OH), HT500, for sodium dodecylbenzenesulfonate, DBS, in water. The results obtained by spectrophotometric measurements show that the adsorption of DBS in HT was low, while in the HT500 the a…
A new layered perovskite compound, NaLaTa2O7, was synthesized by ion-exchange reaction of the rubidium compound, RbLaTa2O7. The crystal structure of the compound was determined by the Rietveld analysis for powder X-ray diffraction pattern. The crystal structure is analogous to that of the corresponding niobate compoun…
We review briefly the Adam-Gibbs-Goldstein approach to understanding the phenomenology of glassforming liquids and note three ways of scaling viscosity or relaxation time data which emphasize different aspects of the relationship between fragile and strong behavior in supercooling liquids. In all these cases, evolutio…
The reaction of LiBu n with [(mes) 2 P(H)O] affords the diorganophosphinate complex [(mes) 2 P(O) 2 Li·2thf] 1 and [(mes) 2 PLi], however, addition of [Cd{N(SiMe 3 ) 2 } 2 ] to the mixture gives the diorganophosphinite complex [{Me 3 - Si) 2 N}Cd{(mes) 2 PO} 2 Li·2thf] 2; the formation of these complexes illustrates t…
The compositional range of ‘Bi4V2O11’ solid solutions containing Na has been determined by means of a phase diagram study using X-ray diffraction and electron probe microanalysis. The locus of the solid solution indicates that Na replaces V in the crystal structure and the BINAVOX family has the overall formula Bi4+yV…
Abstract [MnIIITtBuPP]+[C4(CN)6].‐ · 5PhMe [MnIIITtBuPP = meso‐tetrakis‐(4′‐tert‐butylphenyl)porphinatomanganese(III)] has been prepared and structurally and magnetically characterized. The uniform, linear‐chain (1‐D) coordination polymer comprises alternating cations and anions. The bond lengths in planar ion [C4(CN)…
The system di- tert -butyl nitroxide (DTBN) adsorbed on a thin film of γ-Al 2 O 3 (111) grown on a NiAl(110) single crystal has been studied with various surface science methods, including TPD, XPS, NEXAFS, and ESR line-shapes analysis. In the monolayer regime, two strong chemisorbed species with adsorption energies o…
Novel liquid crystalline oligomesogens, which consist of five, six or eight calamitic 4-cyanobiphenyl, 2-alkyl-5-phenyl-1,3,4-thiadiazole or 5-octyl-2-phenylpyrimidine units covalently linked by spacers of different length with a cyclotribenzylene central core (CTV derivatives, 2,3,7,8,12,13-hexa-substituted 10,15-dih…
Highly dispersed oxides SiO2, TiO2, ZnO, and TiO2/SiO2 modified by organic [di(ethylene glycol), glycerol, butanol, and methanol] and organosilicon (3-aminopropyltriethoxysilane, hexamethyldisilazane, methacryloyloxymethylenemethyl diethoxysilane, and blend of methylcyclosiloxanes) compounds were studied by IR spectro…
An experimental investigation is reported on the relations between the structure and mechanical properties of 3D woven orthogonal structures, one of the major types of textile constructions used for composite reinforcements. Tests for mechanical properties relating to tensile, shearing, and bending forces are discusse…
We investigated the precipitation of carbonates by Deleya halophila in liquid culture media containing different concentrations of marine salt: 2.5%, 7.5%, 12.5%, and 20% (wt/vol). The microorganism was isolated from soils classified as haplic Solonchaks located in arid southeastern Spain. The mineral phases that were…
An infrared radiation(IR) heating method was used to evaluate thermal shock parameters(thermal shock strength and thermal shock fracture toughness)of float glass and alumina. This technique makes it possible to evaluate the parameters directly from the electric power of the IR heater. In this paper we discuss how the…
We have prepared simple photovoltaic devices based on composite materials formed by mixing cadmium selenide or cadmium sulfide nanocrystals with the conjugated polymer poly(2-methoxy, 5-(2′-ethyl)-hexyloxy-p-phenylenevinylene) (MEH-PPV). When the surface of the nanocrystals is treated so as to remove the surface ligan…
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A range of mesoporous vanadosilicate molecular sieves with the MCM-41 structure and the atomic ratio Si/V=10–160 have been synthesized using vanadyl sulfate as the source of vanadium. The products were characterized by XRD and 51 V and 29 Si MAS NMR spectroscopy. The increase of the unit-cell parameter (monitored by X…
The new complexes [(µ4,η4-TCNX){Os(PR3)2(CO)(H)Cl}4], R = isopropyl, TCNX = tetracyanoquinodimethane [TCNQ, 2,2′-(cyclohexa-2,5-diene-1,4-diylidene)bis(propane-1,3-dinitrile)] or 1,2,4,5-tetracyanobenzene (TCNB), were studied by spectroelectrochemistry in the UV/VIS/NIR and IR regions and by EPR spectroscopy. Both com…
Abstract Dichloro‐2‐(N,N‐dimethylaminomethyl)‐phenylgold(III), [Au(damp‐C,N)Cl 2 ], hergestellt durch Umsetzung von [Hg(damp)Cl] mit Na[AuCl 4 ], kristallisiert monoklin, Raumgruppe P2 1 /c mit a = 7,896(3); b = 9,487(2); c = 15,107(6) Å; β = 100,22(3)°, Z = 4. Die Kristallstruktur besteht aus monomeren [Au(damp‐CN)Cl…
The adhesion capability of novel functional polystyrenes to metals and their capability to provide corrosion resistance to metals under various conditions have been investigated. The polyfunctional polystyrenes were prepared via reaction of the polystyrene with different functional groups [2-methyl-2,3-epoxy-6-octene-…
A homogeneous and stoichiometric Pb(Zr,Ti)O 3 (PZT) fine powder was prepared by thermal decomposition of the metal oxalate precursor formed by the precipitation reaction of the metallic components in aqueous solution with oxalic acid. Theoretical solubility isotherms of metal oxalates were established as a function of…
Three new compounds, AgLnW 2 O 8 (Ln 3+ =Eu, Gd or Tb), have been prepared by a solid-state reaction and crystallize with a scheelite-related monoclinic symmetry. Their IR spectra show absorption transitions in the region 1000–400 cm -1 similar to KLnW 2 O 8 . Broad excitation and emission bands of the tungstate group…