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。
An efficient synthetic method to control the molecular weights of poly(phenylene ether) copolymer (Allyl-PPE) with a narrow molecular weight distribution (MWD) by oxidative coupling polymerization of 2,6-dimethylphenol (DMP) and 2-allyl-6-methylphenol (AMP) has been developed. This polymerization was carried out in th…
A double-gyroid nanostructure is a two-component heterostructure that is three-dimensionally periodic, with one material forming a continuous wall-like region of nearly constant thickness centered on the zero-mean curvature $G$ surface. The other material forms two individually continuous channel-like regions. Semicon…
pi-Conjugated polymers can finely tune their electrical and optical properties in response to their conformational changes. We believe that a deeper understanding of their higher-order structures will stimulate further development of their applications. We had revealed that one helix-forming natural polysaccharide (SP…
The structure determination of two composite compounds in the Zn-Pd system with close relationships to the cubic gamma-brass structure Zn(11-delta)Pd(2+delta) is reported. Their structures have been solved from single crystal X-ray diffraction data within a (3 + 1)-dimensional [(3 + 1)D] formalism. Zn(75.7(7))Pd(24.3)…
The synthesis of two [4]-dendralene compounds incorporating thiophene-(p-nitrophenyl) donor-acceptor units is presented. The dendralenes adopt two different conformers in solution and solid state and the transformation between the structures can be controlled by light and heat. The electron-donating components of the…
The 6.85 μm band observed in the spectra of young stellar objects has been analyzed recently and the most usually accepted assignment to the ν 4 bending mode of NH 4 + is still under debate. We present here a laboratory study of frozen solutions of NH 4 + Cl − in water in an astrophysical range of concentrations and t…
The purpose of this work was to investigate how nonwoven fabrics absorb and diffuse liquids and to define relevant diffusion parameters, with a special focus on the influence of fiber diameter on the diffusion process. The nonwoven structures studied were composed of polyester fibers of different diameters and were ma…
Abstract The V‐shaped polyanions [Ln 2 (H 2 O) 10 W 28 O 93 (OH) 2 ] 14– [Ln = Sm ( 1 ), and Eu ( 2 )] have been synthesized by reaction of Ln 3+ and WO 4 2– in aqueous acidic medium. The sodium salt of 1 and the mixed sodium‐europium salt of 2 have been characterized in the solid state by FTIR, single‐crystal XRD, th…
Abstract The photoacetylation of diamondoids (nanodiamonds), in particular [1212]pentamantane, [1(2,3)4]pentamantane, and [123]tetramantane, with diacetyl almost exclusively gives apical acetyl derivatives. The mechanism of the photoacetylation was studied on the basis of a comparative analysis of the experimental deu…
Hyperbranched polyethylenimine (HPEI) was simply mixed with a solution of amphiphilic calix[4]arene (AC4), which possesses four phenol groups and four aliphatic chains, in chloroform. This resulted in the novel supramolecular complex HPEI-AC4 through the noncovalent interaction of the amino groups of HPEI with the phe…
Abstract Heme is a prosthetic group that consists of an iron ion contained in the center of a porphyrin, and a widely distributed cofactor in biology. It serves electron transfer and enzyme catalysis. There are many types of heme, which have several heme side chains such as propionyl, vinyl, and hydroxyfarnesylethyl g…
The Hirsch-Bingel reaction of bis{4-methyl[1,2,3]triazolyl}malonic ester-bridged bis(permethyl-beta-cyclodextrin) 1 with C(60) has led to the formation of a new fullerene-bridged bis(permethyl-beta-cyclodextrin) 2, which has been comprehensively characterized by NMR spectroscopy, MALDI-MS, and elemental analysis. Taki…
Abstract A novel approach to producing improved bio‐interfaces by combining continuous wave (CW) and pulsed plasma polymerization (PP) modes is reported. This approach has enabled the generation of stable interfaces with a higher density of primary amine functionality on metal, ceramic and semiconductor surfaces. Hept…
Drei Schalter in einem Molekül: Die Titelverbindung (siehe Schema) enthält addressierbare Module, die unabhängig voneinander auf Protonierung (Alkinylligand⇄Vinylidenligand), elektrochemische (Metallredoxzentrum: RuII⇄RuIII) und photochemische Reize (Dithienylperfluorcyclopenten: Ringöffnung⇄Ringschluss) ansprechen. D…
Single-crystalline PbTe nanowires were synthesized using the chemical vapor transport method. They consisted of rock-salt structure PbTe nanocrystals uniformly grown in the [100] direction. We fabricated field-effect transistors using a single PbTe nanowire, providing evidence for its intrinsic n-type semiconductor ch…
Syntheses of chiral 6,15-dihydronaphtho[2,3-c]pentaphene derivatives of opposite configurations are reported. Starting from anthracene, the strategy involves two key steps: a Diels-Alder reaction on a prochiral dianthraquinone, and an enantiomeric resolution using (-)-menthol. The final molecules exhibit very strong o…
Abstract The ethylene methyl acrylate copolymer (EMA) and multiwalled carbon nanotube (MWNT) based composites were prepared by solution mixing as well as by melt processing of the films obtained after solution mixing. Field emission scanning electron microscopy, transmission electron microscopy, and XRD were used to c…
In its original formulation the Fourier modal method provides a very fast convergence for one- and two-dimensional dielectric structures, but owing to the Gibbs phenomenon the convergence is poor for a high contrast of the permittivity function, especially for metal–dielectric structures. The scheme has been improved…
Abstract The effect of Mn alloying on PdO powder and Pd‐impregnated Pd + YSZ cathode for the O 2 reduction reaction in intermediate temperature solid oxide fuel cells has been studied in detail. The microstructure, thermal stability, electrochemical activity and performance stability of the powder and cathode were ana…
The ligand 1,3-bis[3-oxo-3-(2-hydroxyphenyl)propionyl]benzene (H(4)L), designed to align transition metals into tetranuclear linear molecules, reacts with M(II) salts (M=Ni, Co, Cu) to yield complexes with the expected [MMMM] topology. The novel complexes [Co(4)L(2)(py)(6)] (2; py=pyridine) and [Na(py)(2)][Cu(4)L(2)(p…