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 bonding of N(2) to the five-coordinate complexes [FeX(depe)(2)](+), X = Cl (1a) and Br (1b), has been investigated with the help of X-ray crystallography, spectroscopy, and quantum-chemical calculations. Complexes 1a and 1b are found to have an XP(4) coordination that is intermediate between square-pyramidal and t…
Moeloite is a new lead-antimony sulfosalt, Pb 6 Sb 6 S 14 (S 3 ), discovered in the Ceragiola marble quarry, near Seravezza town (Tuscany, Italy). Associated minerals are: sulphur, pyrite and enargite. It crystallizes as very thin needles and soft plumose aggregates of flexible thin fibres with a metallic lustre. Unde…
Cadmium sulfide nanoparticles were synthesized intracellularly by a Schizosaccharomyces pombe strain when challenged with 1 mM cadmium in solution. The nanoparticles, a known semiconducting material, exhibited an absorbance maximum at 305 nm. X-ray scattering data showed that the nanoparticles had a Wurtzite (Cd16S20)…
Two new diazamesocyclic ligands based on 1,4-diazacycloheptane (DACH), functionalized by additional heterocyclic donor groups, 1,4-bis(pyridin-2-ylmethyl)-1,4-diazacycloheptane (L1) and 1,4-bis(imidazol-4-ylmethyl)-1,4-diazacycloheptane (L2), together with their CuII complexes [Cu2(μ-Cl)(L1)2](ClO4)3 (1) and [Cu2(μ-Cl…
A brief review of experimental facts regarding ac electronic and ionic conduction in disordered solids is given followed by a discussion of what is perhaps the simplest realistic model, the random barrier model (symmetric hopping model). Results from large scale computer simulations are presented, focusing on universa…
Robust multilayer patterns have been created via layer-by-layer self-assembly using a photochemical linking process that involves aromatic azo group cleavage and coupling with carbonyl oxygens from an adjacent polymer strand. The patterning is based on the solubility difference of the photoreactive multilayer before a…
Aldehyde dehydrogenases are isolated as dimers or tetramers but have essentially identical structures. The homotetramer (ALDH1 or ALDH2) is a dimer of dimers (A-B + C-D). In the tetrameric enzyme, Ser500 from subunit "D" interacts with Arg84, a conserved residue, from subunit "A". In the dimeric ALDH3 form, the intera…
A practical and efficient epoxidation of aromatic olefins using Oxone in a two-phase system (ethyl acetate−water) is described. The reported method is suitable for large-scale synthesis and does not require phase transfer catalyst (PTC) or pH control.
Nanosized TiO2 particles are incorporated into pore channels of mesoporous silica thin films (MSTFs) by a simple constituent-template displacement process, consisting of depositing MSTF on quartz slides, treatment with Ti(OBu)4, and heating. Ti is present in two coordination states, an anatase-like nanosized TiO2 phas…
The adsorption of proteins on surfaces with grafted polymers is studied using a molecular mean-field theory. The effects of changing the protein−surface interactions, the polymer−surface interactions, the polymer segment volume, and the type of possible protein conformations adsorbed are studied. The main results of t…
Phosphoglucomutases catalyze the interconversion of D-glucose 1-phosphate and D-glucose 6-phosphate, a reaction central to energy metabolism in all cells and to the synthesis of cell wall polysaccharides in bacterial cells. Two classes of phosphoglucomutases (alpha-PGM and beta-PGM) are distinguished on the basis of t…
A cation exchange membrane formed via the polymerization of a cobaltabisdicarbollide unit with pyrrole is presented. The cobalt doping agent is covalently bound directly to the pyrrole unit (see Figure); no supporting electrolyte is necessary. An improved overoxidation resistance over the non-covalently linked counter…
Multiaddressable organogelators are 3,3-diphenyl-3 H -naphtho[2,1-b]pyrans covalently linked to sodium N -acyl-11-aminoundecanoate. These molecules have been designed to respond to changes to their environment. They are shown to act as efficient gelators for polar organic fluids, and obviously they exhibit a thermosen…
Luminescence intensity autocorrelation (LIA) is employed to investigate coupling dynamics between (In,Ga)As QDs and a high-Q (~7000) resonator with ultrafast time resolution (150 fs), below and above the lasing threshold at T = 5 K. For QDs resonant and non-resonant with the cavity we observe both a six-fold enhanceme…
The use of microbes as producers of semiconductor nanocrystals is demonstrated. When torulopsis yeast is challenged with lead, it builds intracellular spherical crystallites of PbS, 2–5 nm in diameter (see Figure for an HR-TEM image) and pure by X-ray diffraction. The crystals, which can be isolated by freeze-thawing,…
A simple organic amine-assisted hydrothermal process has been proposed to simultaneously realize the synthesis and assembly of copper sulfide nanoparticles at low temperature (90 ∼ 110 °C). Nanowire-like aggregates (average diameter of 120 nm and length of 2 μm) assembled by digenite phase copper sulfide nanoparticles…
Progress reports are a new type of article in Advanced Materials, dealing with the hottest current topics, and providing readers with a critically selected overview of important progress in these fields. It is not intended that the articles be comprehensive, but rather insightful, selective, critical, opinionated, and…
A compressible random-phase approximation (cRPA) study is performed for a molten UCOT diblock copolymer of incompatible pairs to suggest an effective Flory-type interaction parameter χ cRPA through mean-field spinodals. The compressible nature of a given copolymer system is carried by χ cRPA, which is further divided…
The enantiomeric excesses obtained during the epoxidation reactions of p-chlorostyrene or 1,2-dihydronaphthalene catalysed by two different series of chiral porphyrins are reported. An attempt is made to correlate the enantioselectivity with the steric hindrance generated by the straps of these catalysts. It is shown…
The behavior of chiral-nematic and isotropic phases of helical kappa-carrageenan in aqueous solution of sodium iodide was compared with that of the anisotropic biphasic phase that contains both these phases. On the basis of birefringence, rheology, chemical analysis, average molecular weight, and polydispersity index…