Materials Literature
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Absorption spectra have been measured on polythiophene films subjected to electrochemical Bu 4 N + doping. The spectra show essentially the same evolution as those for BF - 4 doping, i.e., peaks at 0.6∼0.7 eV and 1.5∼1.8 eV appear upon doping in addition to the band-to-band absorption peak at 2.6 eV. Propagation veloc…
Needle-shaped thermoseeds have been manufactured from an alloy consisting of 70.4% nickel and 29.6% copper. The magnetic properties of the alloy were measured at various temperatures and from this the heating power produced by a thermoseed exposed to an electromagnetic induction field was computed as a function of the…
Abstract Palladium compounds such as Pd(PPh3)4 and Pd(OAc)2 catalyze polycondensation between dihalo aromatic compounds, X–Ar–X (Ar=p-phenylene, 2,5-thiophenediyl, 9,10-anthracenediyl, 2,6-pyridinediyl, p-benzenedicarbonyl, p-xylene-α,α′-diyl), and acetylenic compounds (p-C6H4(C≡CH)2 or p-C6H4(C≡CMgBr)2). The polymers…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe geometry of several molecular ions adsorbed on the surface of colloidal silverM. Moskovits and J. S. SuhCite this: J. Phys. Chem. 1984, 88, 7, 1293–1298Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and spectral characterization of some cyclic N-acyl-1,1-diazenesR. D. Miller, P. Golitz, J. Janssen, and J. LemmensCite this: J. Am. Chem. Soc. 1984, 106, 5, 1508–1510Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published in…
Abstract With the accelerator MDB and with MBTS-sulfur, the addition of a relatively small amount of the zinc-accelerator complex (1) caused rapid formation of model crosslinks in 2-methyl-2-pentene under conditions in which neither model crosslink precursors nor model crosslinks were formed appreciably in its absence…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe development of carborane-siloxane polymersEdward N. PetersCite this: Ind. Eng. Chem. Prod. Res. Dev. 1984, 23, 1, 28–32Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://doi.org/10.1021/i300013a006RIG…
The excretory behavior of nine nephrotropic contrast agents with varying physicochemical properties such as charge, lipophilicity, and molecular size was investigated. Renal clearance in comparison with inulin was determined by means of the continuous infusion method. Each contrast agent was infused at three dose leve…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal behavior of some organic phosphatesVeronique Lhomme, Christian Bruneau, Noel Soyer, and Auguste BraultCite this: Ind. Eng. Chem. Prod. Res. Dev. 1984, 23, 1, 98–102Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1…
Problems which arise in the application of closed-shell coupled-cluster approaches to quasidegenerate or almost degenerate situations are discussed and the basic classification of quasidegeneracy types is outlined. Recent coupled-cluster results obtained for the cyclic polyene model, particularly in the strongly corre…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarization effects upon adsorptive and catalytic properties. 1. Carbon monoxide oxidation over palladium deposited on lithium niobate (LiNbO3) ferroelectricsYasunobu Inoue, Isao Yoshioka, and Kazunori SatoCite this: J. Phys. Chem. 1984, 88, 6, 1148–1151Publication Date (Pr…
Coherent anti-Stokes Raman scattering signals may be strongly enhanced when the active molecules are located near the surface of a small silver particle. The theoretical analysis is similar to the electrodynamic mechanism for surface-enhanced Raman scattering, except that there are four instead of two electric fields…
The preparation and characterization of Hong and von Alpen types of Nasicons are described. When highly reactive gel‐processed powders are heated at about 1000°C, Nasicons are formed in a finely divided state. Sintering of compacts requires 1125° to 1325°C, depending on the composition. Observed sintering kinetics sug…
Constitutive equations are derived for nonlinear and linear, nonlocal piezoelectric elastic solids. Restrictions arising from the second law of thermodynamics are determined. The theory of nonlocal em elastic solids is introduced and applied to the discussion of Debye screening of an electron in an elastic solid with…
An NAD-dependent 5,10-methylenetetrahydrofolate dehydrogenase has been purified to homogeneity from autotrophically and heterotrophically grown cells of Acetobacterium woodii. The enzymes from the differently grown cells were indistinguishable by gel filtration and sodium dodecyl sulfate electrophoresis and have a fin…
We have determined equilibrium conditions for each reaction in the solid interconversion sequence [Formula: see text], in aqueous carbonate solutions near 25 °C. Our data yield the following Gibbs energies of formation from the elements, Δ f G ° (298.15 K): plumbonacrite, −5310 ± 31 kJ mol −1 ; hydrocerussite, −1705 ±…
Some years ago Possin reported the fabrication of wires as small as 400 Å in diameter with a method involving electroplating into etched particle tracks in mica. We have refined this technique, and can now use it to routinely produce wires as small as 80 Å. These refinements are described, and the possibility of makin…
Compaction behavior and resultant porosity of spray‐dried alumina were examined over a range of pressures from 18 to 345 MPa. The variability in pressed density and pore size was measured as a function of spray‐dried granule size, binder concentration, and powder moisture content. An exponential behavior was found bet…
Abstract The ternary self‐diffusion data of Ferguson and von Meerwall are analyzed using a generalized form of the free‐volume theory of diffusion proposed by Vrentas and Duda. It is shown that the predicative capabilities of this form of the theory are satisfactory and comparable to those of the Fujita version. The l…
CaF2, CaSO4 and CaCO3 are available in mineral form as fluorite, anhydrite (or gypsum) and calcite (or aragonite) respectively. Fluorite and calcite emit intense thermoluminescence (TL). All three materials can be prepared in the laboratory as highly sensitive TL phosphors by crystal growth or sintering techniques. TL…