Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusual electron-transfer processes involving electron-rich and electron-deficient metallocenesJohn D. L. Holloway, William L. Bowden, and William E. Geiger Jr.Cite this: J. Am. Chem. Soc. 1977, 99, 21, 7089–7090Publication Date (Print):October 1, 1977Publication History Pub…
Abstract The electronic band structure of systems with screw symmetry is developed using the smallest screw displacement as elementary operation. For atomic and molecular helical systems the resulting Hartree‐Fock SCF‐LCAO formulae are presented. Results for ferroelectric HC1 and HP are reported, obtained with the MUN…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrosylmetalloporphyrins. 4. Molecular stereochemistry of two crystalline forms of nitrosyl-.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinato(4-methylpiperidine)iron(II). A structural correlation with .nu.(NO)W. Robert Scheidt, A. Chris Brinegar, E. B. Ferro, and John F.…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The results of the published work on the high pressure-high temperature properties of the AB-type compounds have been compiled and evaluated. All pressure studies above the range of 1 kilobar have been included with an emphasis on the accurate characterization of the solid-solid phase boundaries and the experimental m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of a very small piece of silver metal. The octahedral silver (Ag6) molecule. Two crystal structures of partially decomposed vacuum-dehydrated fully silver(1+) ion-exchanged zeolite AYang Kim and Karl SeffCite this: J. Am. Chem. Soc. 1977, 99, 21, 7055–7057Publicati…
Impression creep tests of LiF single crystals at 600–750[ddot]C and under punching stresses of 4-30 MN/m2 are reported. Both temperature and stress dependences are comparable with those of conventional compression creep tests under similar conditions. These dependences give a power law stress exponent of 4–5 and an ac…
An x-ray diffraction study of Nylon 11 was carried out at high pressures and high temperatures. Careful measurements made on both wet and dry samples at atmospheric pressure indicated that the structure of Nylon 11 suggested by Slichter was not quite correct. Some distortion of the planar conformation causes a shorten…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomoenolate anion precursor. Reaction of ester homoenol silyl ether with carbonyl compoundsEiichi Nakamura and Isao KuwajimaCite this: J. Am. Chem. Soc. 1977, 99, 22, 7360–7362Publication Date (Print):October 1, 1977Publication History Published online1 May 2002Published ini…
The theory of exchange narrowing is extended in systems with large isotropic ${J}_{0}$ to include static spin correlations and antisymmetric exchange. Both contribute to the unusual temperature-dependent, exchange-narrowed EPR linewidth $\ensuremath{\Delta}H(T)$ in $\mathrm{Cu}X_{4}^{}{}_{}{}^{2\ensuremath{-}} (X=\mat…
Relaxation of excited electronic states of rare-earth ions by multiphonon emission was investigated in a beryllium-fluoride glass. Decay rates were measured from the transient fluorescence following pulsed laser excitation of selected states. The multiphonon emission rates exhibit an approximately exponential dependen…
Late during sporulation, Bacillus subtilis produces glucose dehydrogenase (GlcDH; EC 1.1.1.47), which can react with D-glucose or 2-deoxy-D-glucose and can use nicotinamide adenine dinucleotide (NAD) or nicotinamide adenine dinucleotide phosphate (NADP) as a cofactor. This enzyme is found mainly in the forespore compa…
Structure-property relationships were investigated for blends of grafted rubbery polymers with PVC. Increasing grafting levels as well as higher blending temperatures improved the dispersion of the graft copolymers in PVC, lowered the impact strength, and reduced stress whitening. Presuming a mechanistic connection be…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Charles A. Becker, James P. Cowin, Lennard Wharton, Daniel J. Auerbach; CO2 product velocity dist…
A high-angle tilt grain boundary viewed end-on in a (011) thin crystal of Ge has been imaged with atomic resolution in the Kyoto 500 kV electron microscope. The boundary is shown to consist of alternating columns of five- and seven-membered rings of Ge atoms running along the [011] direction, and to contain no danglin…
NaBeAs and NaBeSb crystallize in a modified Ni 2 In-type-structure, space group P 6 3 /mmc–D 6h 4 . Preparation and structure determination with powder and single crystal data are described. The bonds and the structure are discussed in comparison with corresponding compounds of the formula AMe II X. The lattice consta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of high oxidation states by strong electron-donating ligands. Crystal structure and properties of tetra-n-butylammonium o-phenylenebis(biuretato)cuprate(III)-chloroform, (n-C4H9)4NCu[o-C6H4(NCONHCONH)2].CHCl3Paul J. M. W. L. BirkerCite this: Inorg. Chem. 1977,…
The room-temperature damping of three Fe-18Cr-Ni alloys was determined as a function of vibrational strain amplitude at 80 kHz. The data are consistent with the Granato-Lücke theory of dislocation damping. Values of Lc (distance between minor pins) measured are consistent with those obtained from a thermodynamic analy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of oxygen-bridged binuclear chromium(III) complexes with 2,2'-bipyridine and 1,10-phenanthrolineJens. Josephsen and Erik. PedersenCite this: Inorg. Chem. 1977, 16, 10, 2534–2538Publication Date (Print):October 1, 1977Publication History Published online1…
The rate-independent theory of transverse impact of textile fibers is reviewed and cast in a form that provides convenient preliminary guidance to designers of impact-resistant textile structures. It is shown that energy-absorption rate increases monotonically with fiber modulus, but that decreased ductility at high m…