Materials Literature
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Abstract Die Metall‐acetylacetonate M(acac) 2 (M = Mg, Co, Ni, Cu, Zn), M(acac) 3 (M = Al, Sc, V, Cr, Mo, Mn, Fe, Co, In, Ce), MO(acac) 2 (M = Ti, V), MoO 2 (acac) 2 und M(acac) 4 (M = Zr, Th) werden mit Octaäthylporphin [ 1 ; (OÄP)H 2 ] umgesetzt (Tabb. 1 und 2). Abgesehen von Komplexen der Metalle Ce und Th werden d…
Among the factors contributing to the "hazards of hospitalization,"1 or for that matter, the hazards of practicing good medicine, are dangerous complications due to purely diagnostic procedures. One such well recognized though fortunately relatively infrequent complication is the development of acute renal insufficien…
The linearized hydrodynamic behavior of liquid crystals is systematically deduced and earlier theories reconciled and simplified. Predictions for ordinary and depolarized light scattering are obtained and the latter compared with experiment.
Abstract Using a modified Extended Hückel (S. C. C.) procedure the structure of the ferrocenyl‐methyl cation has been calculated. The result is a structure (V) with about equal overlap population between all FeC bonds. The methylene group is bent towards the iron atom and both rings are tilted.
The optical absorption of thin films of silver monofluoride has been investigated in the visible and ultraviolet region of the spectrum at room and low temperatures. Exciton peaks have been observed at 4.63 and 6.34 eV for samples at 4.8 \ifmmode^\circ\else\textdegree\fi{}K. The first exciton peak is considerably lowe…
The paper describes pulse measurements on threshold switches based on thin layers (∼1μ) of multicomponent chalcogenide glasses. By means of voltage reversals prior to switching and monitoring of the corresponding switching delays, it has been demonstrated that switching in these systems is not essentially a thermal pr…
Neutron diffraction analysis of the cubic phase of CaC2 has revealed the characteristics of the hindering potential for rotation of the C2 group, i.e., the body diagonal axes being the easiest direction for the C2 random orientation, the face diagonals being the next easiest and the cube axes being by far the hardest.…
Measurement of the second-order nonlinear optical susceptibility of trigonal selenium yielded d11 = (9.7 ± 2.5) × 10−11 m/V. This value was obtained by cw SHG with a 10.6-μm CO2 laser at a phase-matching angle of 5.5° ± 0.3° to the optic axis. Factors affecting this measurement are discussed along with data on absorpt…
We investigate the properties of binary mixtures of hard-sphere fluids with nonadditive diameters: calling Rij the distance of closest approach between particles of species i and j we assume R12 = 12(R11 + R22) + α with α ≠ 0. We find the exact correlation functions as well as the solution of the Percus–Yevick integra…
Photoemission from several simple models describing the electronic structure of a solid in the presence of a surface is studied. Both nearly free-electron and tight-binding situations are treated, and the yield from the surface states of the latter can be calculated. For a reasonable choice of escape depth, the surfac…
Infrared and Raman spectra of solid LiNO 2• H 2 O, LiNO 2 , NaNO 2 , KNO 2 , and CsNO 2 are presented and discussed. Pronounced changes in the spectra of LiNO 2• H 2 O during dehydration to anhydrous LiNO 2 are interpreted as evidence for an ordered distribution of NO 2 − ions over two non-equivalent sites (akin to li…
The stepwise conversion of infrared ($\ensuremath{\approx}0.97\ensuremath{\mu}$) radiation to near infrared (0.81 \ensuremath{\mu}) and visible (0.475 \ensuremath{\mu}) light in Y${\mathrm{F}}_{3}$ sensitized with ${\mathrm{Yb}}^{3+}$ and activated with ${\mathrm{Tm}}^{3+}$ has been studied in detail. The lifetimes an…
We investigate the role of electron-lattice interactions in a very narrow half-filled band that would otherwise be described as a Mott insulator. A simple Hamiltonian is presented that incorporates the electron-electron and electron-lattice interactions in the zero-overlap limit. A canonical transformation decouples t…
A model anisotropic system, suggestive of the graphite structure, is investigated: It consists of a series of equally spaced parallel planes. A finite two-dimensional density of electrons in each plane is allowed to move freely in the plane, but tunneling between planes does not take place. The dielectric screening of…
The electron drift mobility in GaAs has been calculated and extensively compared to experimental data. Good agreement is obtained for a wide range of temperature and ionized-impurity concentrations. Calculated results for the electron contribution to thermoelectric power are also presented and compared to the small am…
The crystalline potential of a semiconductor is described in the muffin tin potential approximation as a complex lattice of disjoint potential spheres. These consist of atomic potential spheres in the regular lattice sites and hollow spheres, of potential higher than the muffin tin zero, in an interstitial sublattice.…
We have measured the temperature dependence of the dielectric constants for single-domain SrTi${\mathrm{O}}_{3}$ crystals. Dielectric anisotropies and deviations from the simple Curie-Weiss law have been observed and are discussed in connection with the structural phase transitions at 110 and 65\ifmmode^\circ\else\tex…
The vapour phase oxidation of se to SeO2 which is an intermediate step in the production of high-purity se was studied in a flow reactor as a function of O2/Se mole ratio, and temperature. Sodium dichromate on alumina and activated alumina were used as reactor packings with high-purity and crude selenium. Experiments…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution-crystal equilibrium for pyridine-water systemAlan L. Myers and Alfred J. GlessnerCite this: J. Chem. Eng. Data 1971, 16, 2, 181–184Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Published inissue 1 April 1971https://pubs.acs.org/…
(1971). SHOCK INITIATED OXIDATION OF FORMALDEHYDE. Combustion Science and Technology: Vol. 3, No. 1, pp. 47-49.