Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract A polymer with high aromaticity and/or cyclic ring structures chain backbone usually has high heat, thermal, and flame resistance. Two diglycidyl ethers of bisphenols were prepared from 4,4′ isopropylidenediphenol (DGEBA) and 9,9‐bis(4‐hydroxyphenyl) fluorene (DGEBF) for evaluation. Four boroxines—trimethoxyb…
The electrical conductivity of partially stabilized zirconia was investigated as a function of frequency (2 Hz to 100 kHz) and temperature (400° to 1000°C) by measuring ac admittance on a 2‐probe cell using Lissajous figures. The dependence of the conductivity on annealing time was investigated with in situ conductivi…
Abstract Critical review shows that probability estimates regarding human scalp and pubic hair individualization are in error owing to defects in experimental design. The inherent bias is evaluated to preclude improper use of these probability estimates in the future.
Abstract The luminescence of LiLa 1− x M x P 4 O 12 (M = Ce 3+ , Eu 3+ , Tb 3+ , Bi 3+ ) is measured. Only for the Ce 3+ ion pronounced concentration quenching is observed. The spectra of pairs of activators differ slightly from those of isolated activators. The Bi 3+ emission is strongly Stokes shifted and is ascribe…
Ion conduction is considered through electrolytes containing an immobile gradient in the electronic/ionic transport number ratio. It is shown that internal deposition of the metal phase (reduced ions) can occur in such electrolytes during electrolysis. A "critical" applied voltage or current density can be formulated…
The occurrence of glass in the three binary and one ternary oxide systems containing Ge, Bi, and Tl was studied by air‐ and water‐quenching melted samples. Bulk glass occurred widely in these systems and was obtained with as little as 10 mol% GeO 2 , combined with 68 mol% BiO 1.5 and 22 mol% TIO 0.5 . Some glass occur…
The applicability of the hydrodynamical model, obtained from the high-frequency expansion of the density-density response function, for calculating the surface plasmon dispersion relation and plasmons of higher polarity is analyzed. Of crucial importance to get any result for the dispersion coefficients is that the un…
At high conversions of monomer (or high polymer concentrations), chain entanglements and a glassy-state transition (significant reduction in free volume) can have a profound effect on the relative rates of free-radical reactions which control the molecular structure of polymer chains. In particular, it will be shown t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure synthesis, crystal structures, and luminescence properties of europium(II) metasilicate and europium(II)-activated calcium and strontium metasilicatesKenichi Machida, Ginya Adachi, Jiro Shiokawa, Masahiko Shimada, Mitsue Koizumi, Kaichi Suito, and Akifumi Onode…
The classical form of the Nernst-Einstein relation is discussed. It is shown that it leads to an obviously non-general relation between the tracer diffusion coefficient and the chemical diffusion coefficient. The Onsager phenomenological equations are used to deduce an exact form of the Nernst-Einstein relation which…
Abstract The swelling behavior of water in a poly(ethylene–vinyl alcohol) copolymer (70 mol % vinyl alcohol) has been characterized at 25°C by vapor and liquid sorption experiments over a range of water activities. The activity of the vapor phase has been varied by incrementing the pressure of the water vapor in the s…
Abstract The grafting of styrene and acrylamide, from both their binary and unitary systems, on cellulose acetate film was studied by means of the cobalt‐60 postirradiation grafting technique. The extent of grafting was found to be dependent on preirradiation dose, reaction time, and temperature, and the optimum condi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn intermediate-spin iron(III) porphyrin complex with a vinylidene group inserted into a iron-nitrogen bond: paramagnetic susceptibility, EPR, and Moessbauer propertiesDaniel Mansuy, Irene Morgenstern-Badarau, Marc Lange, and Pierre GansCite this: Inorg. Chem. 1982, 21, 4, 1…
Transmission spectra were measured with obliquely incident light for a chiral smectic C phase of (+)-4-n-hexyloxyphenyl 4−(2″-methyl-butyl)biphenyl 4′-carboxylate. Extra reflection bands were observed at about twice the wavelengths of the “normal” Bragg reflection bands, which had been previously predicted by the comp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochromic forms of 6-nitrobenzospiropyran. Emission spectroscopic and ODMR investigationsM. Gehrtz, C. Braeuchle, and J. VoitlaenderCite this: J. Am. Chem. Soc. 1982, 104, 8, 2094–2101Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrophotometric study of copper(II) chloride complexes in propylene carbonate and in dimethyl sulfoxideMax Elleb, Jean Meullemeestre, Marie Jose Schwing-Weill, and Francois VierlingCite this: Inorg. Chem. 1982, 21, 4, 1477–1483Publication Date (Print):April 1, 1982Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrinuclear iridium cluster containing a tricoordinate bridging hydrogen ligand: structural and chemical studiesDaniel F. Chodosh, Robert H. Crabtree, Hugh Felkin, Sheila Morehouse, and George E. MorrisCite this: Inorg. Chem. 1982, 21, 4, 1307–1311Publication Date (Print):Apr…
Although single‐crystal beta‐ and beta''‐aluminas can be ion‐exchanged by immersion in molten nitrates, polycrystalline membranes of Na‐β'‐Al 2 O 3 fracture on contact with molten KNO 3 . A KCl vapor ion‐exchange process allows synthesis of leaktight potassium‐ion‐conducting β''‐Al 2 O 3 membranes. Material properties…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange interaction in multinuclear transition-metal complexes. 1. Synthesis, x-ray structure, and magnetic and spectroscopic properties of di-.mu.-methoxy-dichloro[1,4-piperazinebis(N-ethylenesalicylaldiminato)]diiron(III), Fe2L(OCH3)2Cl2B. Chiari, O. Piovesana, T. Tarante…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolybdenum(IV)-oxo complexes with oxygen, nitrogen and sulfur ligands. Syntheses and electrochemical studiesI. W. Boyd and J. T. SpenceCite this: Inorg. Chem. 1982, 21, 4, 1602–1606Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published…