Materials Literature
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Lead sulfide thin films were grown at room temperature by the successive ionic layer adsorption and reaction (SILAR) technique on soda lime glass, ITO and Al2O3 covered glass, SiO2, (100)Si and (111)Si substrates. SILAR utilises sequential treatment of the substrate with aqueous precursor solutions. Dilute solutions o…
Abstract A novel methodology is proposed in this study to evaluate biofilm adhesion strength in two different ways: by measuring detached biomass caused by tensile force and by shear force. Tensile force was provided by centrifuging biofilm-attached plates installed on rotary tables. Shear force was provided by collid…
X-ray absorption spectroscopy at the L 2,3 edges of 3d transition metals has been used to study the electronic structure of molecular-based magnets with Curie temperatures ranging from 66 to 315 K. These magnets are bimetallic cyanides of the Prussian blue family, constructed by a three-dimensional assembling of −NC−C…
Three types of urethane−acrylate IPN's, two sequential and one simultaneous, were prepared in which the urethane was formed under thermal polymerization; and the acrylate, by photopolymerization. The IPN morphologies were studied by transmission electron microscopy (TEM) and dynamic mechanical analysis (DMA). When the…
The dinuclear Mn III complex [Mn 2 O(PhCOO) 2 (bpy) 2 (OH)(NO 3 )]·H 2 O was prepared by controlled oxidation of manganous nitrate with n -tetrabutylammonium permanganate in the presence of benzoic acid (PhCOOH) and 2,2‘-bipyridine (bpy). Its structure was determined in a single-crystal X-ray diffraction experiment, a…
Description This collection of work represents the tremendous progress that has recently been made toward the characterization and modeling of Titanium Matrix Composites (TMCs), including microstructural aspects, stress analysis, and life models. 29 papers divided into five sections cover: • Interfacial Properties and…
The synthesis of a new monoheteroporphyrin, 5,20-diphenyl-10,15-bis( p -tolyl)-21-selenaporphyrin (SeDPDTPH), is reported. The 21-selenaporphyrin has been characterized by 1 H NMR, 13 C NMR, mass spectrometry, and UV−visible spectra and an X-ray structural analysis. The free base selenaporphyrin SeDPDTPH crystallizes…
Charge transfer and recombination at the single crystalline ZnO photoanode were studied by a combination of dc and ac techniques. The potential dependence of the spectrally resolved photoluminescence gives information on the competition between bulk recombination and electron−hole pair separation. The kinetics of surf…
New methodology was developed for synthesis of regiochemically pure porphyrins with D 2 h symmetry (e.g. 9 ) via tetramerization reactions involving two different pyrroles. The two pyrrole components were a 2,5-diunsubstituted pyrrole (e.g. 11 ) and a 2,5-bis[( N,N- dimethylamino)methyl]pyrrole (e.g. 10 ), the latter…
(meso-Tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)porphinato)manganese(III) tetracyanoethenide, [MnTP'P][TCNE], has been structurally and magnetically characterized. [MnTP'P][TCNE] (C(96)H(108)MnN(8)O(4)) belongs to the triclinicP&onemacr; (No. 2) space group with a = 8.597(2) Å, b = 14.756(4) Å, c = 17.573(5) Å, alpha…
Nine polyesters were synthesized by polycondensation of silylated hydroquinone with substituted terephthaloyl chlorides. Three mono(alkylthio), three bis(alkylthio), and three tetra(alkylthio)terephthaloyl chlorides were used as reaction partners. The length of the alkyl side chains was varied among 8, 12, and 16 carb…
Cellular films may be produced through evaporation of aqueous dispersions containing polymeric particles. The membranes of the cells are made of hydrophilic polymers which cover the particle surfaces; they form a periodic structure which separates the hydrophobic particle cores. These films are used to make adhesive c…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTOn Spherulitic Growth in a Monodisperse ParaffinD. C. Bassett, R. H. Olley, S. J. Sutton, and A. S. VaughanView Author Information J. J. Thomson Physical Laboratory, University of Reading, Reading RG6 6AF, U.K.Cite this: Macromolecu…
Dry-roasted peanuts were coated with whey protein isolate (WPI)/glycerol solutions. Accelerated rancidity tests of uncoated and coated nuts were performed. Coating thickness and environmental relative humidity were studied as factors that affected rancidity. In addition, the effect of limiting the amount of WPI soluti…
Mixed-valence states of μ-oxo-centered trinuclear iron carboxylate complexes, [Fe 3 O(CH 2 BrCO 2 ) 6 (H 2 O) 3 ] ( 1 ), [Fe 3 O(CH 3 CO 2 ) 6 (H 2 O) 3 ]·2H 2 O ( 2 ), and [Fe 3 O(CH 2 ClCO 2 ) 6 (H 2 O) 3 ]·3H 2 O ( 3 ), were characterized by X-ray crystallography and 57 Fe-Mössbauer spectroscopy. Compound 1 has a t…
(2-Nitro-5,10,15,20-tetraphenylporphyrinato)nickel(II) reacts with α-isocyanoacetic esters in the presence of DBU to give the first β-fused pyrroloporphyrins, the pyrrole ring in the fused system being shown to undergo typical pyrrole-type chemistry; the corresponding zinc(II) complex affords a novel cyclopropanochlor…
Cs, Ag, and Zn behave in a different way when deposited on surfaces of ultrathin (15−20 Å) films of alumina. In the case of Cs/Al 2 O 3, the alkali atoms wet the oxide, forming strong chemisorption bonds. At small coverages of Cs, desorption of the alkali occurred between 600 and 1000 K. As the amount of Cs deposited…
A technique is introduced for the theoretical prediction of electronic spectra of lanthanide complexes by replacing the metal ion by a point charge with the ligands held in their positions as determined by the SMLC/AM1, and by computing the theoretical spectra via the intermediate neglect of differential overlap/spect…
In a former paper, the dimensional properties of degraded starch fractions of different molar masses were reported. The behavior was found to be dominated by the highly branched amylopectin. The same samples are now investigated in semidilute solution by static−dynamic light scattering. The deviating values of the ove…
In 1887, Kelvin posed one of the most discussed scientific questions of the last 100 years - the problem of the division of three-dimensional space into cells of equal volume with minimal area. It has interested mathematicians, physical scientists and biologists ever since and the problem has scientific relevance to f…