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。
We propose a new synthetic method for the preparation of PcLuNPc. The electrochemical and electrical properties of thin films of this compound show it is a new molecular semiconductor.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Growth of Silica Monolayer and Generation of Acidity by Chemical Vapor Deposition of Tetramethoxysilane on AluminaNaonobu Katada, Takuya Toyama, and Miki NiwaCite this: J. Phys. Chem. 1994, 98, 31, 7647–7652Publication Date (Print):August 1, 1994Publication Hist…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGround-State Guest-Host Chemistry in the Hydrophobic Cavity of the Unsaturated Cyclic Pd3(dppm)3CO2+ ClusterRejean Provencher, Khin T. Aye, Marc Drouin, Jonathan Gagnon, Nicolas Boudreault, and Pierre D. HarveyCite this: Inorg. Chem. 1994, 33, 17, 3689–3699Publication Date (…
Total sulfur has been measured in 13 petroleum and 14 coal Standard Reference Materials (SRMs) by isotope dilution thermal ionization mass spectrometry. These materials are suitable as primary and quality control standards for determining the sulfur content of oils and coals by X-ray fluorescence and high-temperature…
The effect of counterion on the structure of several anionic metal-chalcogenide complexes is discussed. Examples of compounds which show these dramatic effects are presented and some conclusions are made regarding our ability to predict the dimensionality of a structure.
The heme iron in cytochrome c-550 from Thiobacillus versutus has a methionine and a histidine as axial ligands. In order to study the characteristics of a possible lysine-histidine ligation in a heme protein, the methionine has been replaced by a lysine. This residue acts as a ligand between pH 3 and 12. The midpoint…
The inhibition of copper (Cu) corrosion in 1.5% sodium chloride (NaCl) solution was studied in the presence of different concentrations of piperidine, piperidine dithiocarbamate, and its Cu(II) complex at 25°C. All three additives were found to be excellent inhibitors of Cu corrosion. The difference in inhibition effi…
The dielectric behavior of the antiferroelectric liquid crystal (R)-1-methyl- heptyl-4-( 4 ′′ -n-dodecyloxybiphenyl- 4 ′ carbonoyloxy)-3-fluorobenzoate was investigated by dielectric spectroscopy. In the antiferroelectric SmC A * phase three dielectric active processes were detected. At least one of them, the process…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Ionic Chain Polydispersity on the Size of Spherical Ionic Microdomains in Diblock IonomersDiep Nguyen, Xing-Fu Zhong, Claudine E. Williams, and Adi EisenbergCite this: Macromolecules 1994, 27, 18, 5173–5181Publication Date (Print):August 1, 1994Publication History…
A symmetric diblock ethylene-propylene copolymer (DEP) was synthesized through hydrogenation of an anionically polymerized polybutadiene-poly(2-methyl-1,3-pentadiene) diblock copolymer (PBDb-PMPD).IR and NMR measurements showed the hydrogenation to be more than 98% complete.The resultant diblock copolymer consists of…
Experiments involving the solidification of a Pb-19 percent Sn alloy in an axisymmetric, annular mold of stainless steel are performed, and results are compared with numerical predictions. Agreement between measured and predicted cooling curves is reasonable, although undercooling and recalescence, which occur in the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetalloporphyrin .pi.-Cation Radicals. Molecular Structure and Spin Coupling in a Vanadyl Octaethylporphyrinate Derivative. An Unexpected Spin Coupling PathCharles E. Schulz, Hungsun Song, Young Ja Lee, Jalal U. Mondal, K. Mohanrao, Christopher A. Reed, F. Ann Walker, and W.…
A two-dimensional Monte Carlo simulation algorithm is formulated following the tunneling mechanism for localized (pitting) corrosion. Depending on the values of a minimum set of control parameters, easily interpreted in terms of physicochemical variables, the two limiting regimes of stable and unstable corrosion are r…
The influence of temperature and time of austempering on a nodular cast iron austenitised for 30 min at 900°C has been investigated using optical and transmission electron microscopy. The carbon content of the austenite has been evaluated by measuring the lattice parameter via X -ray diffraction. The structure consist…
To improve surface hemocompatibility on cellulose hollow fibers for hemodialysis, newly designed hemocompatible polymers with a phospholipid polar group, 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers, were introduced on the surface through two different methods: direct grafting of MPC on the surface, or coat…
Glasses of the (65−x)PbO⋅xPbX2⋅35B2O3 system (where X=F, Cl, Br, and I) have been made and investigated by Raman measurements. Three low frequency bands with high Raman intensities have been observed at about 40, 105, and 135 cm−1, respectively. It is found that the intensities of the depolarized low frequency Raman c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-Component Donor-Acceptor Organic Semiconductors Derived from TCNQPaloma Bando, Nazario Martin, Jose L. Segura, Carlos Seoane, Enrique Orti, Pedro M. Viruela, Rafael Viruela, Armando Albert, and Felix H. CanoCite this: J. Org. Chem. 1994, 59, 16, 4618–4629Publication D…
Abstract The comparative interaction of Mg 2+ and Ca 2+ counterions on carboxyl groups of polygalacturonic acid is developed. Ultracentrifugation, conductimetry, potentiometry, and CD were used in this work. Evidence is provided for a simple electrostatic interaction of Mg 2+ counterions; on the opposite side, coopera…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTsyn-Oxidative Polycyclization of Hydroxy Polyenes: A New Approach to Polyether SynthesisFrank E. McDonald and Timothy B. TowneCite this: J. Am. Chem. Soc. 1994, 116, 17, 7921–7922Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published i…
Simulated high burnup UO2 and (U, Gd)O2 pellets, doped with soluble fission product elements (Sr, Zr, Y, La, Ce, Nd), were prepared. Pellet thermal diffusivities were measured by a laser flash method and their thermal conductivities were evaluated. Thermal conductivities decreased with an increase in the total amount…