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。
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCondensative Chain Polymerization in Solid−Liquid Phase. Synthesis of Polyesters with a Defined Molecular Weight and a Narrow Molecular Weight Distribution by PolycondensationTsutomu Yokozawa and Hideto SuzukiView Author Information Department of Applied Chemistry Kana…
The [Cu 4 OCl 6 (IMIDH) 4 ] complex has been synthesized and its crystal structure and magnetic properties determined. The compound crystallizes as a dark green solid in the orthorhombic system, space group P 2 1 2 1 2 1, with cell constants a = 11.469(2) Å, b = 13.933(2) Å, c = 16.778(3) Å and four formula units per…
The electrometallurgical processing of spent fuel developed at Argonne National Laboratory produces a cathode which contains dendrites of heavy metal (principally U), salts, and residual cadmium. The cathode requires further treatment which is accomplished by loading it into a cathode processor to first purify and the…
We describe a detailed synthesis of a silicified inorganic/organic nanoporous monolithic composite conforming to the lyotropic liquid crystalline L 3 phase. The pore dimensions of the silicified L 3 phase scale with the solvent volume fraction in the synthesis reaction mixture. Changing the solvent fraction in the ini…
PFA sheets were modified with remote hydrogen plasma, and effects of the modification on the adhesion between copper layer and FEP were investigated. Remote hydrogen plasma treatment for a short time of 30 s is able to make the PFA surface hydrophilic. The remote hydrogen plasma treatment causes defluorination and oxi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Long Chain Branched Polypropylene with Relatively Well-Defined Molecular StructureBing Lu and T. C. ChungView Author Information Department of Materials Science and Engineering, The Pennsylvania State University, Univer…
The structures and phase transitions occurring during the compression of polystyrene−poly(ethylene oxide) (PS−PEO) diblock copolymer monolayers at the air−water interface have been studied by surface pressure isotherms, neutron reflectivity, and Brewster angle microscopy. At low coverage, the EO monomers adsorb at the…
The pronounced ability of fullerene C60 to act as an electron and energy acceptor has led to the synthesis of a large number of compounds in which C60 is covalently linked to photoactivatable groups which can serve as potential donors. Such compounds are of interest as model systems for photosynthetic reaction centers…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Syndiotactic Polystyrene (s-PS) Containing a Terminal Polar Group and Diblock Copolymers Containing s-PS and Polar PolymersGuangxue Xu and T. C. ChungView Author Information Department of Material Science and Engineerin…
Activated carbon fibers (ACFs) were oxidized using both aqueous and nonaqueous treatments. As much as 29 wt % oxygen can be incorporated onto the pore surface in the form of phenolic hydroxyl, quinone, and carboxylic acid groups. The effect of oxidation on the pore size, pore volume, and the pore surface chemistry was…
The moisture absorption in granulated materials used in foundry technologies is analyzed. The absorption process has a diffusive behavior mainly. A simple experimental technique, in which the wet weight increment was recorded as the experimental parameter and an analytic method with computing procedure to find the par…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSingle-Site Catalysts for Ring-Opening Polymerization: Synthesis of Heterotactic Poly(lactic acid) from rac-LactideMing Cheng, Athula B. Attygalle, Emil B. Lobkovsky, and Geoffrey W. CoatesView Author Information Department of Chemistry and Chemical Biology Baker Labor…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA New Nonhydrolytic Single-Precursor Approach to Surfactant-Capped Nanocrystals of Transition Metal OxidesJörg Rockenberger, Erik C. Scher, and A. Paul AlivisatosView Author Information Department of Chemistry, Box 101 University of California, Berkeley, Berkeley Calif…
Nitration of octafluoro[2.2]paracyclophane (OFP) provides an entry into the synthesis of a series of 11 monosubstituted OFPs, including the nitro, amino, chloro, bromo, iodo, hydroxy, and trifluoromethyl compounds. The NMR, mass spectrometric, and UV spectral properties of all of these derivatives are presented and di…
The authors have addressed the identification of molecular fossils of deoxophylloerythroetioporphyrin (DPEP) complexes of vanadium (V) and nickel (Ni) and its partitioning from crude oil into the environment. The analyses described here involve water/surfactant solutions that were in contact with the Boscan crude oil…
Two isostructural tellurium-rich tellurites, Na 2 WTe 4 O 12 ( 1 ) and Na 2 MoTe 4 O 12 ( 2 ), have been synthesized and structurally characterized by single-crystal X-ray diffraction studies. Three types of polyhedra, namely, MO 6 octahedra, TeO 3 pyramids, and TeO 5 square-pyramids, constitute the three-dimensional…
We analyze the Cerenkov emission of high-frequency confined acoustic phonons by drifting electrons in a quantum well. We find that the electron drift can cause strong phonon amplification (generation). A general formula for the gain coefficient, alpha, is obtained as a function of the phonon frequency and the structur…
Time-dependent properties of the speckled intensity patterns created by scattering coherent radiation from materials undergoing spinodal decomposition are investigated by numerical integration of the Cahn-Hilliard-Cook equation. For binary systems which obey a local conservation law, the characteristic domain size is…
Reaction of sodium azide with manganese(II) and pyridine derivatives such as 2-bzpy, 3-bzpy, and 3,5lut (2-benzoylpyridine, 3-benzoylpyridine, and 3,5-dimethylpyridine, respectively) led to the one-dimensional systems cis -[Mn(2-bzpy)(N 3 ) 2 ] n ( 1 ), trans -[Mn(3-Bzpy) 2 (N 3 ) 2 ] n ( 2 ), and cis- [Mn(3,5lut) 2 (…
As pointed out by Linus Pauling in his classic work on the relationship between crystal packing and ionic radius ratio, a difference in atomic size can be accommodated more readily by an ordered structure than by a disordered one. Because of mathematical complexity, however, very few works have been reported for subst…