Modified Corroles with One Meso-Free Carbon: Synthesis and Characterization
[reaction: see text] Synthesis of mono meso-free modified corroles by a [3+1] methodology is reported.
Materials Literature
文献浏览
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 Monte Carlo Simulation Scheme for Nonideal Dendrimers Satisfying Detailed Balance
We present a configurational-biased lattice Monte Carlo scheme for simulating nonideal dendrimers that satisfies detailed balance. This corrects an important shortcoming in a previous lattice Monte Carlo scheme by Mansfield and Klushin: in a previous publication, we showed that the Mansfield and Klushin scheme did not…
Detailed Study of Diluted V2O5Suspensions
Starting from gel suspensions of vanadium pentoxide (V 2 O 5 ), we have prepared a series of samples by dilution with aqueous solutions of HPF 6 or NH 4 OH to control the vanadium concentration and the pH. We have first accurately determined the limit of stability of V 2 O 5 ribbonlike particles from visual observatio…
Bismuth Titanate from Mechanical Activation of a Chemically Coprecipitated Precursor
Most of the chemistry‐based preparation routes for bismuth titanate (BIT) involve calcination at elevated temperatures in order to realize precursor‐to‐ceramic conversion. In a completely different approach using an amorphous BIT hydroxide precursor, nanocrystalline particles of layered perovskite BIT are synthesized…
Characterization and modeling of illite crystal particles and growth mechanisms in a zoned hydrothermal deposit, Lake City, Colorado
Mean thickness measurements and crystal-thickness distributions (CTDs) of illite particles vary systematically with changes in hydrothermal alteration type, fracture density, and attendant mineralization in a large acid-sulfate/Mo-porphyry hydrothermal system at Red Mountain, near Lake City, Colorado. The hydrothermal…
The effects of grinding on the structure of a low-defect kaolinite
Numerous studies have demonstrated the presence of at least two distinct kaolinites in individual kaolinite samples, one a low-defect material and the other a moderate- to high-defect material. Other studies have shown that some kaolinites contain the lowest-defect material in the coarsest size fractions whereas other…
A comparison between metal supported c-ZrO2 and CeO2
We present periodic density-functional theory calculations within the GGA Hamiltonian for monolayers of Pd and Pt supported on the {111} surfaces of cubic-ZrO2 and CeO2. We find that the adsorption energies for the Pd-layer on both the zirconia and ceria supports are ca. 200 kJ mol−1, while the corresponding adsorptio…
The neutral diradical 5,5'-bis(1,3,2,4-dithiadiazolyl) [-], the first main group radical to exhibit a dramatic increase in paramagnetism on mechanical grinding
Reduction of [([Formula: see text]) 2 ][As 6 ] 2 with triphenylantimony and tetrabutylammonium chloride produced the diradical 5,5'-bis(1,3,2,4-dithiadiazolyl) [[Formula: see text]-[Formula: see text]] in high yield as a black solid with widely ranging magnetic susceptibilities (e.g., 0.6 to 2.6 μ B ), which on oxidat…
Influence of the processing conditions on a two‐phase reactive blend system: EVA/PP thermoplastic vulcanizate
Abstract The elaboration of a TPV based on copolymer of ethylene and vinyl acetate (EVA) and polypropylene (PP) as thermoplastic phase was investigated in a batch mixer. The crosslinking reaction is carried out through a transesterification reaction between ester groups of EVA and alcoxysilane groups of the crosslinke…
Influence of the Metal Particle Size on the Crack Growth Resistance in Mullite–Molybdenum Composites
The R ‐curve for mullite–molybdenum (32 vol%) composites, which were obtained at 1650°C under reducing conditions with three different Mo average grain sizes (1.5, 3, and 9 μm), was estimated by the indentation‐strength method and compared with that monolithic mullite obtained under similar conditions. The composites…
Gelling of Alumina Suspensions Using Alginic Acid Salt and Hydroxyaluminum Diacetate
This paper proposes a novel direct casting method of alumina suspensions using alginic acid salt and the coagulation agent hydroxyaluminum diacetate (HADA). These two compounds allowed the consolidation of alumina suspensions through a simultaneous time‐delayed physical and chemical gelation process. The physical gel…
Facile Formation of Stable Crystals with Gold-like Metallic Luster from Organic Molecules: 1-Aryl-2-(2-thienyl)-5-[5-(tricyanoethenyl)-2-thienyl]pyrroles
Abstract The derivatives of 1-phenyl-2-(2-thienyl)-5-[5-(tricyanoethenyl)-2-thienyl]pyrrole (1a) formed crystals with gold-like or bronze-like metallic luster. When a small substituent is located at the para position of the 1-phenyl group, gold-like lustrous crystals were formed. In contrast, the derivatives of 1 havi…
Effect of Cyclization of Polystyrene/Polyisoprene Block Copolymers on Their Micellar Morphology
Micelles made from linear polystyrene-block-polyisoprene (PS/PI) in decane are spherical. The differences in the structure of micelles made from linear and cyclic PS/PI were investigated using small-angle X-ray scattering at rest and under shear flow. The effect of shear revealed that micelles made from cyclic copolym…
Dynamics of polymer thin films in supercritical carbon dioxide
In situ neutron reflectivity and dynamic secondary ion mass spectrometry measurements were used to investigate the dynamics of polystyrene thin films in supercritical carbon dioxide (scCO 2 ). The results show that the large degree of anomalous swelling observed is associated with a decrease in glass transition temper…
Smectic Phases with Cubic Symmetry: The Splay Analog of the Blue Phase
We report on a construction for smectic blue phases, which have quasi-long-range smectic translational order as well as long-range cubic or hexagonal order. Our proposed structures fill space with a combination of minimal surface patches and cylindrical tubes. We find that for the right range of material parameters, t…
A Monte Carlo-Quantum Mechanics Study of the Solvent-Induced Spectral Shift and the Specific Role of Hydrogen Bonds in the Conformational Equilibrium of Furfural in Water
The solvation shift of the lowest absorption transition of furfural in water is analyzed as a function of the rotation angle for the interconversion between the two conformations, OO-cis and OO-trans, of furfural. In total, 20 Monte Carlo NPT simulations are performed, corresponding to different rotation angles of the…
Preparation of graft copolymers from deproteinized and high ammonia concentrated natural rubber latices with methyl methacrylate
Abstract Deproteinized natural rubber (DPNR) latex was prepared by the incubation of fresh natural latex with a proteolytic enzyme. The DPNR latex was later used to prepare a graft copolymer with methyl methacrylate (MMA). High ammonia (HA) concentrated latex was also used to prepare a graft copolymer with MMA. The ap…
Catalyst Coatings for Microstructure Reactors
Catalytic active coatings for microchannels have been developed for metallic microstructure reactors in heterogeneous catalyzed gas phase reactions. To enhance the inner surface of microchannel reactors, porous metal oxide coatings have been made by various deposition techniques such as sol–gel processes, anodic oxida…
Structural and chemical heterogeneity of illite-smectites from Upper Jurassic mudstones of East Greenland related to volcanic and weathered parent rocks
Article Structural and chemical heterogeneity of illite-smectites from Upper Jurassic mudstones of East Greenland related to volcanic and weathered parent rocks was published on November 1, 2002 in the journal American Mineralogist (volume 87, issue 11-12).
Insulator Icing Test Methods and Procedure
This is a position paper prepared by the IEEE Task Force on Insulator Icing Test Methods. Test methods for evaluating flashover voltage of ceramic and nonceramic insulators under ice, snow, and cold-fog conditions are recommended. The paper describes the procedure to be followed at various stages of an evaluation test…