Materials Literature
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Luminescence spectra, excitation spectra, and lifetimes taken on Cu and VO porphyrins in polymethylmethacrylate on a Cryo-Tip between 80 and 10°K confirm the prediction that the unpaired metal d electron couples with the porphyrin triplet to give “tripdoublet” and quartet states. Four Cu porphyrins show loss of the ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of chemically induced nuclear spin polarization. III. Effect of isotropic g shifts in the components of radical pairs with one hyperfine interactionGerhard L. Closs and A. D. TrifunacCite this: J. Am. Chem. Soc. 1970, 92, 7, 2183–2184Publication Date (Print):April 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of methyl sterculateWalter J. Gensler, M. Brawner Floyd, Ryobun Yanase, and Kenneth PoberCite this: J. Am. Chem. Soc. 1970, 92, 8, 2472–2475Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 April 1970https://doi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThiophosphate chemistry. Anion set X2PS2-, (XPS2)2S2-, and (XPS2)2S22-Herbert W. Roesky, Fred N. Tebbe, and Earl L. MuettertiesCite this: Inorg. Chem. 1970, 9, 4, 831–836Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction of Iron Ore with Hydrogen in a Direct Current Plasma JetHerbert L. Gilles and Curtis W. ClumpCite this: Ind. Eng. Chem. Process Des. Dev. 1970, 9, 2, 194–207Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 Apri…
Abstract The thermal decomposition and vaporisation of ammonium sulphate, (NH 4 ) 2 SO 4 , is shown to take place via two distinct sets of reactions. In the first, ammonium pyrosulphate, (NH 4 ) 2 S 2 O 7 , is the primary condensed phase product: 2(NH 4 ) 2 SO 4 ← (NH 4 ) 2 S 2 O 7 +2NH 3 +H 2 O The second stage conce…
Abstract A newly developed numerical Laplace transform inversion technique is described. A derivation of the method, termed the ‘multidata method’, is presented along with a description of a similar collocation method. Similarities and differences between the two numerical methods are described and discussed. Results…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric properties of liquid propylene carbonateLarry Simeral and Ralph L. AmeyCite this: J. Phys. Chem. 1970, 74, 7, 1443–1446Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 April 1970https://pubs.acs.org/doi/10.102…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoluminescence of transition metal coordination compoundsPaul D. Fleischauer and Patricia. FleischauerCite this: Chem. Rev. 1970, 70, 2, 199–230Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 April 1970https://pubs.a…
Equations are derived for nonplanar dissociations of dislocations in hcp metals. Various components of AB, Aμ, φθ, [AB+φθ], and s′ [AB+φθ] dislocations on the basal, prism, and pyramidal planes meet the criteria for dissociation into twinning partials on{2̄11l} and{1̄01l} planes, and the Burgers vectors of the twinnin…
Abstract The reaction between pyrroles and benzaldehyde in refluxing acetic acid gives meso ‐tetraphenylporphins and chlorins. The initial condensations give a porphyrinogen which undergoes an acid catalyzed autoxidation to porphyrin via a porphodimethene. The chlorin is shown to be derived from the reduction of porph…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic resonance studies of some low-spin d5 tris diimine complexesRichard E. DeSimone and Russell S. DragoCite this: J. Am. Chem. Soc. 1970, 92, 8, 2343–2352Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 April 1970h…
Abstract Selectivity of a number of vermiculites, montmorillonites and micas for K and Cs ions was determined by sorption of these ions from equilibrium solutions of diverse concentrations. The selectivity coefficients were related to the layer charge density and the area of the frayed edges in layer silicates. Montmo…
The Raman scattering in crystalline polyethylene, deuterated polyethylene, and n-paraffins has been investigated as a function of temperature. Crystal-field splitting of the A1G methylene bending mode observed at room temperature increases at − 160°C in both polyethylene and deuterated polyethylene. No splitting of th…
A glass with composition 0.265 B 2 O 3 ‐0.405 BaO‐0.33 Fe 2 O 3 (mole ratio) was prepared by a fast‐quenching technique. When it is heat‐treated, this glass exsolves up to ∼45 wt% BaFe 12 O 19 as the only magnetic phase. Magnetic measurements of glasses heated at various temperatures show that superparamagnetic, singl…
Abstract The nature of interstratification in mixed-layer illite-montmorillonites has been investigated by comparison of diffraction patterns of ethylene glycol and ethylene glycol monoethyl ether treated samples with calculated one-dimensional diffraction profiles. The calculated profiles take into account the effect…
Abstract The demand for graphites with specific properties and for an improvement in the economics of graphite production in recent years has led to an increased interest in catalytic graphitisation. At the present time, however, there is no review available of published studies and this paper attempts to make good th…
Various transport studies have been carried out on amorphous and crystalline GeTe films of 80 Å to 10 μ thickness. Crystalline GeTe has a low resistivity (∼10−4 Ω·cm at 300°K) which increases with temperature slowly and nearly linearly at low temperatures (below ∼300°K) and rapidly at higher temperatures. The hole con…
The forming process, by which changes are brought about in the electronic conduction of thin films of various binary amorphous oxides and halides, is first described, and experimental evidence is put forward which contradicts an earlier theory of the forming process in gold-silicon monoxide-metal structures. A theory…
A new theory is presented for calculating the structure of finite nuclei from the nucleon-nucleon interaction. The essential features of the reaction matrix in finite nuclei are obtained from nuclear-matter theory through the local-density approximation. The resulting density- and energy-dependent effective interactio…