Materials Literature
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Limited information is available on inherent stabilities of four-chain-coils. We have developed a model system to study this folding motif using synthetic peptides derived from sequences contained in the tetramerization domain of Lac repressor. These peptides are tetrameric as judged by both gel filtration and sedimen…
An extension to the peaklist optimization procedure is proposed, in which one overall phase refinement cycle consists of tangent expansion, E-map, peaksearch and elimination of peaks to achieve a maximum correlation coefficient between E o and E c . This procedure appears to be able to solve large structures from rand…
Abstract An electroactive material with remarkable solubility, processibility as well as mechanical properties has been developed by complexation (thermal doping) of polyaniline (PANi) emeraldine base with dodecylbenzenesulfonic acid (DBSA) in the solid state. Isothermal treatment of such a mixture was found to promot…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetranuclear Pentaammineruthenium Complexes Bridged by .pi.-Conjugated Tetracyano Ligands Related to TCNE: Syntheses and Spectroscopy of Different Oxidation StatesMichael Moscherosch, Eberhard Waldhoer, Herbert Binder, Wolfgang Kaim, and Jan FiedlerCite this: Inorg. Chem. 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic Viscoelastic Modulus of Associative Polymer Networks: Off-Lattice Simulations, Theory and Comparison to ExperimentsRobert D. Groot and Wim G. M. AgterofCite this: Macromolecules 1995, 28, 18, 6284–6295Publication Date (Print):August 1, 1995Publication History Publish…
A series of complexes Ru(CΞCC6H4R-4)(PR'3)2(η5-C5H5) (R = H, R' = Ph, 1a; R = H, R' = Me, 1b; R = NO2, R' = Ph, 2a; R = NO2, R' = Me, 2b) has been synthesized by reaction of RuCl(PR'3)2(η-C5H5) with 4-HCΞCC6H4R and deprotonation of the intermediate metal vinylidene complex. The complexes are of the donor-acceptor type…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Mechanics for Coordination Complexes: The Impact of Adding d-Electron Stabilization EnergiesVeronica J. Burton, Robert J. Deeth, Christopher M. Kemp, and Phillip J. GilbertCite this: J. Am. Chem. Soc. 1995, 117, 32, 8407–8415Publication Date (Print):August 1, 1995P…
The nucleation of a lamellar phase from a supercooled homogeneous phase in a fluctuation-driven first-order transition is studied, based on a phenomenological free energy due to Brazovskii (Zh. Eksp. Teor. Fiz. 68, 175 (1975) [Sov. Phys. JETP 41, 85 (1975)]). The absence of phase coexistence in the corresponding mean-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-State 17O Magic-Angle and Dynamic-Angle Spinning NMR Study of the SiO2 Polymorph CoesiteP. J. Grandinetti, J. H. Baltisberger, I. Farnan, J. F. Stebbins, U. Werner, and A. PinesCite this: J. Phys. Chem. 1995, 99, 32, 12341–12348Publication Date (Print):August 1, 1995Pu…
Visible electroluminescence (EL) has been reported from semitransparent Au film/extra thin Si-rich silicon oxide film/p-Si diodes at room temperature. The Si-rich silicon oxide films, with thickness of about 40 Å, were grown using the magnetron sputtering technique. At forward bias of 4 V, EL spectra with peak energy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoexistence of Magnetic and Delocalized Electrons in Hybrid Molecular Materials. The Series of Organic-Inorganic Radical Salts (BEDT-TTF)8[XW12O40](solv)n (X = 2(H+), BIII, SiIV, CuII, CoII, and FeIII; solv = H2O, CH3CN)Carlos J. Gomez-Garcia, Carlos Gimenez-Saiz, Smail Trik…
The variational boundary integral method of Xu and Ortiz is taken as a basis for studying dislocation nucleation from atomically sharp cracks under combined mode I-mode II loading. The tension-shear potential of Rice et al. is extended to allow for skewness in the shear resistance curve and to account for the surface…
The absolute lattice parameters of single- and polycrystalline materials have been measured to within a few parts per million with a high-resolution diffractometer. The problems associated with 'zero errors' and sample centring on the goniometer are eliminated and high precision is achieved by virtue of the exceedingl…
Temperature-dependent static magnetization, ac magnetic susceptibility, and electrical-resistivity measurements of single-crystal ${\mathrm{DyNi}}_{2}$${\mathrm{B}}_{2}$C reveal bulk superconductivity below ${\mathit{T}}_{\mathit{c}}$=(6.2\ifmmode\pm\else\textpm\fi{}0.1) K. This ${\mathit{T}}_{\mathit{c}}$ is well bel…
Understanding the nonlinear relationship between neutron or x-ray reflectance and the scattering-length-density (SLD) profile of a surface film is important for valid and efficient data inversion in reflectivity studies of material films, surfaces, and interfaces. For this reason, a systematic analysis is made of the…
The triple point smectic-C--smectic-F--hexatic-B (C-F-B) has been found in binary mixtures of THl-n (thienyl-enaminoketone derivatives) compounds with different length of molecular terminal chains n. Differential scanning calorimetry (DSC), x-ray scattering, and optical studies show that this point is a multicritical…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman and Infrared Study of the Polymer Electrolytes Formed by Poly(propylene oxide) with Sn(CF3SO3)2 and Pb(CF3SO3)2Pehr-Aake Bergstroem and Roger FrechCite this: J. Phys. Chem. 1995, 99, 33, 12603–12611Publication Date (Print):August 1, 1995Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLattice oxygen mobility and structural stability of Ni and Cu octahedral molecular sieves having the cryptomelane structureYuan-Gen Yin, Wen-Qing Xu, Steven L. Suib, and C. L. O'YoungCite this: Inorg. Chem. 1995, 34, 16, 4187–4193Publication Date (Print):August 1, 1995Public…
Abstract In general, segmented polyurethane elastomers are prepared by reacting an isocyanate‐capped polyol prepolymer with a short‐chain diol chain extender, yielding an elastomer with hard segments of uniform size. However, the hard segment size will not be uniform if the polyurethane polymer is prepared by forming…