Materials Literature
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Polydichlorophosphazene (NPC12)X is unique as a synthetic precursor for poly(organo)phosphazenes [1–6] and presents special problems in polymerization studies because of branching, crosslinking, and cyclization reactions and in characterization due to the polymer's hydrolytic instability. This paper reviews the litera…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN-Methylprotoporphyrin IX. Identification by NMR of the nitrogen alkylated in each of the four isomersKent L. Kunze and Paul R. Ortiz de MontellanoCite this: J. Am. Chem. Soc. 1981, 103, 14, 4225–4230Publication Date (Print):July 1, 1981Publication History Published online1…
Abstract This review will be restricted to the applications of liquid polybutadienes (BR) which, as prepared, are devoid of functional groups other than the unsaturation left after polymerization. These products should not be confused with the so called telechelic BRs in which terminal functional groups are deliberate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlanar, pleated, and saddle-shaped structures of the phthalocyanine dianion in two novel multidentate oxygen-donor complexes of dipotassium phthalocyanineR. F. Ziolo, W. H. H. Guenther, and J. M. TroupCite this: J. Am. Chem. Soc. 1981, 103, 15, 4629–4630Publication Date (Pri…
For the transport calculation of gamma rays including bremsstrahlung, an improvement is made in the PALLAS-PL, SP discrete ordinates direct-integration code to enable evaluation of bremsstrahlung. The electrons resulting from Compton scattering, pair production, and the photoelectric effect are individually evaluated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman spectroscopic study of the high-pressure phase of polyethyleneStephanie L. WunderCite this: Macromolecules 1981, 14, 4, 1024–1030Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs.org/doi/10.…
The solubilities of gypsum (CaSO 4 ·2H 2 O) and halite (NaCl) in aqueous solutions with ionic strengths between 3 and 13 were studied under ambient conditions. Mixtures of Mediterranean seawater and Dead Sea brines, evaporated to various degrees, served as experimental solutions. The practical solubility constant of g…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGallium-71 NMR studies of anionic gallium halide species in nonaqueous solutionBruce R. McGarvey, Michael J. Taylor, and Dennis G. TuckCite this: Inorg. Chem. 1981, 20, 7, 2010–2013Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and molecular stereochemistry of fluoro(meso-tetraphenylporphinato)iron(III)Kazunori Anzai, Keiichiro Hatano, Young Ja Lee, and W. Robert ScheidtCite this: Inorg. Chem. 1981, 20, 7, 2337–2339Publication Date (Print):July 1, 1981Publication History Published onlin…
The model of photoelectrochemical corrosion‐stabilization of semiconductors has been extended. Detailed expressions for rate constants are given including capture cross sections and energy levels for hole capture. It is concluded from analysis of experimental data that the first hole in the rate‐limiting step is captu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of tetraphenylporphyrin molecules containing heteroatoms other than nitrogen. 6. Electrochemical studiesAbraham Ulman, Joost Manassen, Felix Frolow, and Dov RabinovichCite this: Inorg. Chem. 1981, 20, 7, 1987–1990Publication Date (Print):July 1, 1981…
We have characterized the spectra, acidity constants and decay kinetics of the triplet and semireduced radical species of Safranin-O. Between pH 3.0 and pH 10.6 there are three triplet species denoted (3)DH2(+2), (3)DH(+) and (3)D, the pK(sub a)s being 7.5 and 9.2. All three triplet species exhibit first order decay,…
This paper presents an analysis of a copper torsion test specimen exhibiting a thermal softening instability at a high strain rate. A consititutive relationship derived from test data includes strain hardening, strain rate effects, and thermal softening. This relationship is used to numerically simulate the thermal so…
Using Landau theory, we show that the red shift of the primary Bragg reflection in cholesteric blue phases and the appearance of more than one cubic structure can be understood by including harmonics of the basic spatial frequency in the order parameter. A new nonsymmorphic bcc structure, having ${O}^{8}(I{4}_{1}32)$…
The growth of primary N-nitrosomethylurea-induced rat mammary tumors was depressed by cis-hydroxyproline (CHP). This growth arrest appeared to be related to the ability of CHP to inhibit the deposition of basement membrane collagen as based on the following observations: (a) in vitro and in vivo, tumor cells synthesiz…
The grain boundary composition of nickel base alloy 600 has been studied by means of Auger electron spectroscopy. After being cathodically charged with hydrogen in a water saturated salt bath at 200 C, all the specimens could be intergranularly fractured in the Auger chamber. Phosphorus was the only element found to s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman spectra, excitation profiles, and infrared spectra of [N,N'-ethylenebis(salicylideniminato)]cobalt(II) in the solid stateM. Suzuki, T. Ishiguro, M. Kozuka, and K. NakamotoCite this: Inorg. Chem. 1981, 20, 7, 1993–1996Publication Date (Print):July 1, 1981Publi…
Abstract The compatibility and phase separation behavior of mixtures of the diglycidyl ether of bisphenol A and carboxyl‐terminated butadiene‐acrylonitrile copolymers were studied by means of light transmission, viscosity measurements, and optical microscopy. Cloud point measurements of the blends prior to curing show…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding in Ni(PH3)2(C2H4) and Ni(PH3)2(C2H2). Ab initio SCF-MO studyKazuo Kitaura, Shigeyoshi Sakaki, and Keiji MorokumaCite this: Inorg. Chem. 1981, 20, 7, 2292–2297Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1…
Low temperature visible spectra of Compounds I from peroxidases reconstituted with protohemin, 2-formyl-4-vinyldeuterohemin, 2-vinyl-4-formyldeuterohemin, 2,4-dimethyldeuterohemin, and 2,4-diacetyldeuterohemin reveal that these Fe(IV) porphyrin pi-cation radicals take the 2A2u of peroxidase-type electronic ground stat…