Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A background continuum in the Raman spectrum of adsorbed molecules at a silverelectrolyte interface is observed experimentally. This background continuum is potential dependent on the Stokes and anti-Strokes of the spectrum and fits a Fermi distribution function on the anti-Stokes side of the spectrum. The continuum i…
A wall-induced birefringence in a nematic liquid crystal above the nematic-isotropic phase transition point has been observed for the first time. It is expected that this phenomenon will provide a useful tool to study the nature of aligning forces at liquid-crystal-solid interfaces.
The lowering of the Fermi energy in stage-1 Fe${\mathrm{Cl}}_{3}$-intercalated graphite is directly measured in the spectrum of electronic excitations from carbon $1s$ core states to empty carbon $2p$ states which appear after intercalation. The shape of the core exciton spectrum is related to the initial distribution…
New structural models for 2\ifmmode\times\else\texttimes\fi{}1 and 4\ifmmode\times\else\texttimes\fi{}2 reconstructed (100) surfaces of Si determined from energy-minimization claculations are presented. The optimal 2\ifmmode\times\else\texttimes\fi{}1 and 4\ifmmode\times\else\texttimes\fi{}2 structures are found to co…
The catalytic activity of MnO/sub 2/ prepared by different methods has been determined from the initial rate of decomposition of H/sub 2/O/sub 2/ and the conversion of CO to CO/sub 2/. The activity is correlated with various physicochemical properties such as active oxygen, surface excess oxygen, surface OH groups, cr…
Abstract With the purpose of obtaining information needed for hazard prevention, pure liquid dialkyl peroxides (di-t-butyl peroxide (1), bis(1-methyl-1-phenylethyl) peroxide (2), t-butyl 1-methyl-1-phenylethyl peroxide (3), 2,5-bis(t-butyldioxy)-2,5-dimethylhexane (4)) were subjected to thermal-decomposition experimen…
Dislocation damping as a function of strain amplitude following quenching and during 1-MeV electron irradiation was investigated by measuring Young’s modulus and the logarithmic decrement in high-purity polycrystalline copper. A ’’peaking effect,’’ an initial increase and subsequent decrease in the damping, was observ…
A method is presented for localizing molecular orbitals, based on diagonalizing subunits of the density matrix. First, nonbonding orbitals are found by diagonalizing the monatomic subunits; then, diatomic sigma or pi bonding and antibonding orbitals are obtained from the diatomic subunits for all bonded pairs of atoms…
The radical anions of methyl-, methoxy-, fluoro-, cyclopropyl-, and cyanocyclooctatetraene were generated by electrolytic reduction of the neutral compounds in liquid ammonia.The electron spin resonance spectrum of each radical anion is assigned, and a clean even-odd alternation of the spin densities is observed in ea…
Abstract Na 2 S 2 CO 3 crystallizes in 4 modifications. The familiar monoclinic a-form stable at ambient temperature transforms into the trigonal β-form at 330 °C which at 388 °C converts to b ccy-Na 2 S 2 O 3 . These transformations are reversible. Unstable orthorhombic α'-Na 2 S 2 CO 3 (Pna2 1 ) is obtained by dehyd…
Abstract A magnesian halotrichite [(Fe 0.63 Mg 0.37 ).Al 2 (SO 4 ) 4 .22H 2 O] from a fumarole deposit on the active andesitic volcano of White Island, New Zealand, occurs as the major component in the mixture halotrichite—H 2 S0 4 ‐H 2 0—alunogen, with accessory gypsum, alunite, anhydrite, quartz, cristo‐balite, and…
Abstract Two new intermetallic compounds K 3 Ag 3 As 2 and K 3 Cu 3 As 2 have been prepared and their crystal structures determined. They crystallize in the rhombohedral space group R3̅m with K 3 Cu 3 As 2 : a = 576(2) pm, c = 2026(5) pm, K 3 Ag 3 As 2 : a = 599(2) pm, c = 2135(4) pm. and are isotypic to K 3 Cu 3 P 2
Abstract A procedure is described which permits the classification of solvents according to their effect on polycarbonate (PC): Class I—dissolve amorphous or crystalline PC Class II—dissolve only amorphous PC Class III—convert amorphous PC to crystalline PC Class IV—none of the above. This classification is achieved b…
The EPR spectrum of polychromatic glass continuing Ce3+ and Ce4+ and after exposure to long wavelength UV light is reported. The EPR center is identified as Sh4+. (AIP)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of complexes of lanthanide nitrates and isonicotinic acid hydrazide, Ln(NO3)3.3INH.3H2OL. B. Zinner, D. E. Crotty, T. J. Anderson, and M. D. GlickCite this: Inorg. Chem. 1979, 18, 7, 2045–2048Publication Date (Print):July 1, 1979Publication History Pu…
Abstract The viscosity of PVC plastisols is seen to be affected by numerous variables. Increase in concentration of the resin causes the viscosity to rise, with the increase being more abrupt at the higher concentrations. Deviation from Newtonian behavior also increases with concentration. Decrease in the size of part…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of phosphazenes. 9. Reactions of (primary amino)chlorocyclotetraphosphazenes with dimethylamine: formation of "bicyclic" phosphazenesS. S. Krishnamurthy, K. Ramachandran, Arjun C. Sau, Robert A. Shaw, A. R. Vasudeva Murthy, and Michael WoodsCite this: Inorg. Chem. 19…
Two adult patients ingested an overdose of 2.4 g and 8.0 g of sotalol hydrochloride, respectively, i.e. 7-25 times the mean daily dose. Certain signs as bradycardia and hypotension were similar to those described for other beta-blocking agents. In addition to these, however, both patients had severe cardiac tachyarrhy…
The stable and metastable phase relations in the system Ph 2 SiO 4 ‐PhSiO 3 , were reexamined using Raman and ir spectroscopy to characterize the phases. Three stable phases, H‐Ph 2 SiO 4 , M‐Ph 2 SiO 4 , and M‐Ph 2 SiO 4 (alamosite) and four metastable phases, L‐Ph 2 SiO 3 , phase X , L‐PhSiO 3 and hexagonal PhSiO 3…
The recovery process of deuterium dissolved in excess in nickel was studied by means of the liquid hydrogen quenching and electrical resistivity measurement developed by the author. The diffusion coefficient of deuterium was determined as D =3.18 ×10 -3 exp (-9220/ R T ) cm 2 /sec between 220 K and 340 K, and compared…