Materials Literature
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Abstract Complexes [NiL2(H2O)X]X·nH2O (L=N,N-dimethyl-1,2-ethanediamine; n=0 when X=BF4; n=1 when X=Br; n=3 when X= Cl), [NiL2(H2O)Y]·nH2O (n=2 when Y= SeO4; n=5 when Y=SO4), [NiL2(H2O)2](NO3)2·H2O and [NiL2] (ClO4)2 have been synthesized and investigated thermally in the solid state. The complexes [NiL2(H2O)Cl]Cl·3H2…
The application of submicron grating structure for light trapping in thin silicon solar cells has been investigated theoretically and experimentally. A gain in absorption corresponding to an increase in thickness of more than a factor of 4 for polarized light and about 3 for unpolarized light has been demonstrated.
This paper is a review of already published work. Exciton-relaxation processes in organic solids are discussed. Pyrene and poly(phenylenevinylene) (PPV) crystals are investigated as two examples of strong exciton–phonon coupled systems. Free-exciton luminescence is observed simultaneously with self-trapped exciton lum…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZinc N-substituted porphyrins as novel initiators for the living and immortal polymerizations of episulfideTakuzo Aida, Kenichi Kawaguchi, and Shohei InoueCite this: Macromolecules 1990, 23, 17, 3887–3892Publication Date (Print):August 1, 1990Publication History Published on…
Abstract The influence of particle size on particulate fouling rates during convective sensible heat transfer to liquids has been investigated. Experiments have been carried out using aluminum oxide particles with nominal diameters ranging from 0.06 μm to 15 μm, suspended in an organic solvent for a wide range of conc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoordination of the "pendant-arm" macrocycle 6,13-diamino-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane to chromium(III). Crystal structure and physical properties of the hexacoordinated complex ionPaul V. Bernhardt, Peter Comba, Neil F. Curtis, Trevor W. Hambley, Geoffrey…
Ultrasonication is very effective in dispersing alumina and barium titanate slurries. When optimum conditions are used, very short durations (2 to 3 min) are enough to achieve well‐dispersed, stable suspensions.
Microcrystalline vaterite, CaCO3, has been synthesized by decomposition of ikaite, CaCO3.6H2O, crystals at room temperature. Scanning electron micrographs show that vaterite occurs as arborescent aggregates ~30 to 40 μm in size. This growth form has not been described before. It is of interest that the overall morphol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe electronic structure of barium gallium antimonide (Ba7Ga4Sb9): a compound seemingly probing the limits of the Zintl conceptPere Alemany, Santiago Alvarez, and Roald HoffmannCite this: Inorg. Chem. 1990, 29, 17, 3070–3073Publication Date (Print):August 1, 1990Publication…
The insulator‐to‐metal transition , doping, the mechanism of conductivity, solitons, and organic ferromagnets are among the topics covered in this overview of developments in conducting polymers. The materials are already in commercial use in, for example, batteries. Further possibilities are examined and the latest d…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. J. McGrory, W. H. Tuminello; Determining the molecular weight distribution from the stress rel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of nickel carbonyl clusters: chemical bonding and spectroscopy of [Ni5(CO)12]2-, [Ni6(CO)12]2-, and [Ni8C(CO)16]2- studied by the LCGTO-LDF methodGianfranco Pacchioni and Notker RoeschCite this: Inorg. Chem. 1990, 29, 16, 2901–2908Publication Date (Print…
Methodology for designing reliable ceramic components requires a precise evaluation and correlation of strengths in different stress states. The present paper compares the merits of the Weibull approach and the multiaxial elemental strength model on an experimental case involving mixed‐mode failure in the presence of…
The effect of root exudates on structural stability and the hypothesis that the growing roots of corn (Zea mays L.) can destabilize soil structure by chelating Fe and Al involved in mineral-metal-organic matter linkages were investigated. Exudates were removed from 14 C-labelled corn and bromegrass (Bromus inermis Ley…
Results are reported from a composition study of forty-one phosphate glasses that are derivatives of a commercially available Nd-doped laser glass. Systematic variations have been made in the quantities of alkali and alkaline earth components in the glass. Correlations are developed relating the compositionally-averag…
Abstract Copolymers of acrylic acid and butyl acrylate crosslinked with 4,4′‐bis(methacryloylamino)‐azobenzene were synthesized by radical copolymerization with different amounts of acrylic acid and crosslinker. They were characterized by equilibrium degree of swelling, modulus of elasticity in compression at pH 2 and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of the Fenske-Hall molecular orbital method to the calculation of boron-11 NMR chemical shifts. Antipodal substituent effects in deltahedral clustersThomas P. Fehlner, Paul T. Czech, and Richard F. FenskeCite this: Inorg. Chem. 1990, 29, 17, 3103–3109Publication…
The development of polyacetylenes, polythiophenes and polypyrroles , amongst other conducting polymers is traced from an industrial point of view by one of the pioneers in the field. The methods used for the production of the materials are described and present and future applications are assessed.
The in vitro degradation of glycine-DL-lactic acid copolymers was studied as a function of the composition. These polydepsipeptides were prepared by ring-opening copolymerization of 6-methyl-2,5-morpholinedione and DL-lactide. The degradation of discs of the copolymers was performed in a phosphate buffer at pH 7.4 and…
Abstract The surface charges and the zeta potential of a Na-montmorillonite (Na-mont) and two pillared montmorillonite (MP1 and MP2) samples with different aluminum contents were determined by Potentiometric titrations and electrophoretic measurements. At pH >9 the two pillared montmorillonite samples showed zeta p…