Materials Literature
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Two new compounds [Co(η-C5H5)2][Ni(C3S5)2]3·2MeCN and [Ni(η-C5H5)(C3S5)], both obtained by combination of the nickel complex anion [Ni(C3S5)2]–(C3S5= 4,5-disulfanyl-1,3-dithiole-2-thionate) and the metallocenium cation [M(η-C5H5)2]+(M = Co or Ni), respectively, have been prepared and characterized crystallographically…
Low-temperature single-crystal pulsed neutron diffraction is used to determine accurate positions and thermal parameters for all 33 atoms of the ibuprofen molecule, and the data used to predict the crystal morphology.
Cadmium telluride nanoclusters were prepared by vapor-phase deposition of elemental tellurium in Na + −zeolite A, followed by partial exchange of the zeolite with aqueous Cd(NO 3 ) 2, and reduction with hydrogen at 450 °C. The stability of the nanoclusters in environments that normally cause rapid Ostwald ripening or…
Abstract The melt viscosity of filled polymers depends on the filler particle packing. It is shown that the maximum particle packing for a low density polyethylene, filled with calcium carbonate, depends strongly on the filler surface treatment. This packing can be evaluated from melt viscosity measurements using the…
In studying the reaction mechanism of anodic aniline oxidation the dimer p -aminodiphenylamine (ADPA) was found to be the main intermediate product in acidic solution. It is oxidized in both the free amine and the protonated form. The cyclic voltammograms have been simulated by taking into account an electrochemical r…
H. McNab, Contemp. Org. Synth., 1996, 3, 373 DOI: 10.1039/CO9960300373
Hydrogen sulfide, often present in crude oil tankers, can react with rust to form various sulfides including mackinawite (FeS), greigite (Fe 3 S 4 ), and pyrite (FeS 2 ). The tendency for these compounds to react with oxygen in air to form potentially explosive mixtures depends upon their morphology and the environmen…
The deoxygenation of the mixed-metal polyoxoanion [(C(4)H(9))(4)N](3)NbW(5)O(19) with benzoyl chloride in dichloromethane forms quantitatively the condensed polyoxanion [(C(4)H(9))(4)N](4)(NbW(5)O(18))(2)O, in which two polyoxoanion fragments are linked together by a Nb-O-Nb oxo bridge. The product is characterized by…
Using the Lindsey method the title compounds were prepared from the corresponding metallocenecarbaldehydes and pyrrole in 56% and 40% yield respectively.
The solidification of peritectic alloys is reviewed, including both nucleation and growth. The introduction defines various compositions associated with binary peritectic alloys, their ‘equilibrium’ solidification, multicomponent peritectic systems, and metastable phases in peritectic systems. Nucleation studies are r…
Tight-binding electronic band structures and Madelung potentials were calculated for La(2)NiO(4), La(3)Ni(2)O(7), and La(4)Ni(3)O(10) to examine why a metal-to-metal transition occurs in the nickelate Ln(4)Ni(3)O(10) (Ln = La, Nd, Pr). La(4)Ni(3)O(10) and La(3)Ni(2)O(7) are each found to have two hidden one-dimensiona…
The measurement of voltages, currents and losses of saturated magnetic devices under nonsinusoidal conditions is not well understood, because the principle of superposition does not apply. The complexity of the task is increased by the fact that internally generated harmonic currents can be compensated by externally a…
Recently it has been reported that autoxidation of a Jet-A fuel which occurs during passage through heated stainless-steel tubing is accelerated by the tubing walls and that this effect is mitigated as the surface becomes fouled. To investigate the generality of this finding, we have studied the depletion of dissolved…
The modulation of chemical events using light is attractive for applications in many technologies including displays, information storage and sensors. Spiropyrans are the most well studied of the technologically relevant photochromic compounds. Their oxidation is important from at least two perspectives: oxidative fai…
Lead iodide (PbI 2 ) clusters were synthesized from the chemical reaction of NaI (or KI) with Pb(NO 3 ) 2 in H 2 O, D 2 O, CH 3 OH, and C 3 H 7 OH solvents. The observation of absorption features between the 550 and 350 nm region obtained with an integrating sphere strongly suggests PbI 2 quantum dot formation in solu…
Les mammiferes qui ont une existence strictement souterraine rencontrent des problemes physiologiques tres differents de ceux qui vivent sur le sol. L'habitat souterrain met effectivement a l'abri des stress d'un climat extreme et de la predation, mais il constitue aussi un environnement sombre et peu ventile. L'adopt…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFerroelectric Liquid Crystals for Nonlinear Optics: Orientation of the Disperse Red 1 Chromophore along the Ferroelectric Liquid Crystal Polar Axis†David M. Walba, Daniel J. Dyer, Teresa Sierra, Peter L. Cobben, Renfan Shao, and Noel A. ClarkView Author Information Dep…
The synthesis of the AB 2 mesogenic group 13-hydroxy-1-(4-hydroxyphenyl)-2-(4-hydroxy-4‘-biphenylyl)tridecane (TPT‘-OH, 11 ) and its use in the preparation of 1,12,33,44-tetraoxa-25-[(methacryloyloxy)undecanyl]-57-ethyl[12.0.2.12.0.2]paracyclophane ( 17 ), 1,12,33,44,65,76-hexaoxa-25-[(methacryoyloxy)undecanyl]-57,89-…
Key dimensions were selected for women's ready-to-wear garments to generate an anthropometric size-labeling system designating garment size with body measurements. Two different statistical analyses were used to select key dimensions: residual variance analysis and factor analysis. The results of the study show that (…
We recently proposed a new method allowing the controlled synthesis of ring-shaped polymers with predictable molar masses and narrow molar mass distribution. The cyclization is based on a unimolecular “end-to-end” coupling reaction of an heterodifunctional linear polymer precursor. In this paper, this methodology is a…