Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear quadrupole interactions in copper(II)-diethylenetriamine-substituted imidazole complexes and in copper(II) proteinsFeng Jiang, John McCracken, and Jack PeisachCite this: J. Am. Chem. Soc. 1990, 112, 25, 9035–9044Publication Date (Print):December 1, 1990Publication Hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAqueous colloidal dispersions of polyaniline formed by using poly(vinylpyridine)-based steric stabilizersS. P. Armes, M. Aldissi, S. Agnew, and S. GottesfeldCite this: Langmuir 1990, 6, 12, 1745–1749Publication Date (Print):December 1, 1990Publication History Published onlin…
Shape memory alloy hybrid composites have been shown both by analytical simulations and experiments to be effective adaptive materials for active vibration and structural acoustics control [Rogers and Robertshaw, Engineering Science Preprints 25, ESP25.88027, Society of Engineering Sciences (1988) and ASME Paper 88-WA…
Pure BaTiO 3 exhibits a paraelectric‐to‐ferroelectric phase transition at 130°C. When stoichiometric BaTiO 3 is combined with 10 mol% ZrO 2 , the relative permittivity (ε) changes to a broad, relatively insignificant temperature dependence, and the Curie point, T c , is not sharply defined. However, the transition sha…
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Polarized reflection and ESR measurements have been carried out on single crystals of newly synthesized halogen-bridged one-dimensional (1D) metal complexes {M(chxn${)}_{2}$Br}${\mathrm{Br}}_{2}$ (M=Pt, Pd, Ni; chxn=1R,2R-cyclohexanediamine), which have tight hydrogen bonds between ligands (chxn) and counter anions ($…
The dimers 1 can be prepared in 70% yield by Glaser coupling, if the reaction is carried out in the presence of 4,4′-bipyridine as template. With a tripyridyltriazine as template, formation of the corresponding trimer (52%) is favored. Without template the reaction is unselective: Dimer and trimer are formed together…
Higher multipole corrections to the dipole-approximation result for angular distributions of photoelectrons at low photon energies are discussed. The first-order corrections lead to a simplified formula for the angular distribution, which extends the dipole results for linearly, unpolarized, and partially polarized li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA tetranuclear hydroxo-bridged copper(II) cluster of the cubane type. Preparation and structural and magnetic characterization of tetrakis[(2,2'-bipyridyl)hydroxocopper(II)] hexafluorophosphateJorunn Sletten, Astrid Soerensen, Miguel Julve, and Yves JournauxCite this: Inorg.…
Two quasiperiodic planar patterns with fivefold symmetry are derived from the root lattice A 4 in 4-space. A detailed analysis of the geometry of the A 4 Voronoi complex and its dual complex is presented with special emphasis on fivefold symmetry. By means of the general dualization method, 2D patterns are obtained, o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObservation of strain-induced β form in poly(β-hydroxyalkanoates)W. J. Orts, R. H. Marchessault, T. L. Bluhm, and G. K. HamerCite this: Macromolecules 1990, 23, 26, 5368–5370Publication Date (Print):December 1, 1990Publication History Published online1 May 2002Published inis…
Intrinsic defects have been produced in yttria- and calcia-stabilized zirconia (YSZ or CaSZ) single crystals either by x irradiation at 300 and 77 K or by thermochemical reduction at 1370, 1670, and 1870 K. The spectroscopic properties of the defects have been studied by electron paramagnetic resonance (EPR), optical…
Despite strong twisting of the conjugated system, the tetrathiafulvalene homologue 1 reacts with the electron acceptor tetracyanoquinonodimethane to give the dication 12⊕. The anthracene moiety is embedded in the 12⊕ [(TCNQ)4]2⊖, and the dithiol rings are twisted 86° with respect to the anthracene plane: The 1:4 stoic…
Domain boundaries (DB's) in convection patterns are studied near the onset of convection within the framework of amplitude equations of the Newell-Whitehead-Segel type. It is demonstrated that DB's of an arbitrary direction are possible between domains occupied by convection rolls with different orientations. Those DB…
Following a major shortage of 99Mo in the 2009–2010 period, concern grew that the aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as the target material. The Organisation for Economic Co-...Read More
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew route to unsymmetrical phthalocyanine analogs by the use of structurally distorted subphthalocyaninesNagao Kobayashi, Ryoko Kondo, Shinichiro Nakajima, and Tetsuo OsaCite this: J. Am. Chem. Soc. 1990, 112, 26, 9640–9641Publication Date (Print):December 1, 1990Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNMR and crystallographic studies of a p-sulfonatocalix[4]arene-guest complexSeiji Shinkai, Koji Araki, Tsutomu Matsuda, Nobuaki Nishiyama, Hirotaka Ikeda, Isao Takasu, and Masakazu IwamotoCite this: J. Am. Chem. Soc. 1990, 112, 25, 9053–9058Publication Date (Print):December…
It must be measured the height that is obtained in the peaks indicated in the diffractograms of the compounds: CaO, SÍO2, β-C2S γ-C2S, C3A, C2F and C4AF, with the finality of study their mutual influences, and also study the aluminoferrites over such bicalcic silicates, obtained from differents raw mix. The adquired k…
Two factors have determined the actual deterioration state of the Cathedral of Cádiz, one is natural and the other is anthropogenic. On one hand, the presence of salts conditioned by atmospherical environment and saline solutions of the rising damp; on the other hand, the vicissitudes suffered by the temple during its…