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。
The motion of granular material in a ball mill is investigated using molecular dynamics simulations in two dimensions. In agreement with experimental observations by Rothkegel [1] we find that local stresses - and hence the comminution efficiency - are maximal close to the bottom of the container. This effect will be…
Na-kanemite has been completely converted to a new layered silicate in a reaction mixture of tetramethylammonium hydroxide (TMAOH) solution, water and 1,4-dioxane as solvent via hydrothermal treatment at temperatures above 130 °C. The effects of the content of TMAOH and water as well as the type of organic solvents on…
Inelastic neutron-scattering spectra of oriented nylon-6 were measured using the filter−analyzer and time-of-flight techniques. The samples studied were semicrystalline fibers with the crystalline fraction either in the α or the γ form, and selectively deuterated polymer films. Strong features observed in the inelasti…
A space-ship-like Cu8 cluster (see picture) results from the linking of two linear [Cu] units previously assembled through the template action of a pentadentate O ligand. The core of the cluster represents an entirely new topology within the vast family of magnetically coupled Cu aggregates. The alkoxide-bridged octan…
In this study, the effects of particle size and heating rate on the combustion properties of Silopi asphaltite were investigated. Nonisothermal thermogravimetry experiments were carried out at three different size fractions and five different heating rates. The TG/DTG experiments were carried out from ambient to 900 °…
Two new tetraazamacrocyclic ligands are designed with the aim of sensitizing the luminescence of Tb(III) and Eu(III) ions in water: L5 [1,4,7,10-tetrakis[N-(phenacyl)carbamoylmethyl]-1,4,7,10-tetraazacyclododecane] and L6 [1,4,7,10-tetrakis[N-(4-phenylphenacyl)carbamoylmethyl]-1,4,7,10-tetraazacyclododecane]. These li…
A series of doubly pyridazine-bridged dicobalt(II) macrocyclic complexes, 1–7, is reported. The pyridazine-containing Schiff-base macrocycle L1 [derived from the (2 + 2) condensation of 3,6-diformylpyridazine and 1,3-diaminopropane] provides four nitrogen donor atoms, disposed in an approximately square-planar manner,…
Abstract New aromatic diamines substituted with a trifluoromethyl group in the side chain, 2,4‐diamino‐3′‐trifluoromethylazobenzene, 2,4‐diamino‐1‐[(4′‐trifluoromethylphenoxy) phenyl] aniline, and 3,5‐diamino‐1‐[(4′‐trifluoromethyl phenoxy) phenyl] benzamide were synthesized and characterized and used to prepare polyi…
Immobilisierte Gold-Nanopartikel wurden durch Abscheidung auf einem makroporösen Film mit dreidimensionaler Ordnung erhalten. Die lokalisierte Oberflächenplasmonenresonanz der Nanopartikel und die photonische Bandlücke des Films sind nach der Immobilisierung noch vorhanden und hängen vom Brechungsindex des umgebenden…
The photochemical and electrochemical properties of a Zn-porphyrin appended rhenium(I) tricarbonyl bipyridine 3-Me-pyridine complex have been investigated; visible-light sensitisation of electron transfer results in ligand substitution at a site remote from the chromophore.
The effects of component interactions on aqueous solubilities and dissolution rates were determined for the explosive formulations octol, composition B, and LX-14 and for mixtures of three separate explosive compounds that make up these formulations. Experiments were performed over the temperature range of (10−30)°C a…
The electrosynthesis of poly(p-xylylenes) (PPXs) and poly(p-phenylenevinylenes) (PPVs) by the direct and mediated cathodic reduction of (halomethyl)arenes is reviewed and, where appropriate, comparisons made with more conventional chemical routes. Attention is drawn to the advantages of mild (non-thermal) conditions a…
Pyrolysis of six nonconventional fuels has been studied by means of nonisothermal thermogravimetric analysis from low (5 °C/min) to high heating rates (as large as 900 °C/min). The fuels tested included plastics, rubbers, and ligno-cellulosic materials, namely, polyethylene, poly(ethylene terephthalate), scrap tires,…
We have studied the optical conductivity of several intermetallic compounds of the Al-Cr-Fe system in a broad range of frequencies. Depending on composition, the crystallographic structure of these compounds evolves from that of a close approximant of the decagonal phase to a \ensuremath{\gamma}-brass structure, a sup…
We introduce a new combination of diene/diene microstructures to form microphase-separated ABC terpolymers. The synthesis and morphology of two triblock terpolymers of the poly(butadiene - b -styrene - b -isoprene) (BSI) type and one poly(styrene - b -butadiene - b -isoprene) (SBI) type are reported. The microstructur…
A highly lipophilic polyion complex [Pt(en)(2)][PtCl(2)(en)(2)](1)(4) (en, 1,2-diaminoethane) is prepared from one-dimensional mixed valence Pt(II)/Pt(IV) complex and newly designed chiral amphiphile 1. The powdery sample showed purple color, which is a result of the mixed valence absorption of the linear chlorobridge…
We have deposited continuous Au films on the Cu 2 S nanowire surfaces using a simple redox reaction, forming a novel type of Cu 2 S/Au core/sheath nanowires. The core/sheath nanostructures were characterized by various spectroscopic and microscopic techniques. The Cu 2 S core that was used as the template was typicall…
The complex dielectric permittivity $(\ensuremath{\varepsilon}={\ensuremath{\varepsilon}}^{\ensuremath{'}}\ensuremath{-}i{\ensuremath{\varepsilon}}^{\ensuremath{''}})$ of relaxor ferroelectric $0.75\mathrm{Pb}({\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}\ensuremath{-}0.25{\mathrm{PbTiO}}_{3}$ ceramics with…
Attachment of Fréchet-type poly(benzyl ether) dendrons [G-n] to carbonylruthenium(II) meso-tetraphenylporphyrin (5) using covalent etheric bonds forms a series of dendritic ruthenium(II) porphyrins 5-[G-n](m) (m=4, n=1, 2; m=8, n=0-2). The attachment was realized by treating the carbonylruthenium(II) complex of 5,10,1…
The syntheses, structures, and characterization of three new mixed metal selenites, Al 2 (Se 2 O 5 ) 3, Ga 2 (Se 2 O 5 ) 3, and In 2 (Se 2 O 5 ) 3 are reported. Al 2 (Se 2 O 5 ) 3 and Ga 2 (Se 2 O 5 ) 3 are isostructural to Cr 2 (Se 2 O 5 ) 3 and crystallize in the monoclinic space group P 2 1 / n (No. 14) with a = 10…