Materials Literature
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Abstract We prepared α‐Fe filled carbon nanotubes (CNTs) by introduction of appropriate water vapours during the growth process and found that the walls of carbon nanotubes are reduced effectively. It is also found that soft magnetic performances of Fe‐filled CNTs (Fe@CNTs) are improved remarkably compared with that w…
The role played by the carbonyl group in the antenna system of a naturally occurring photochromic chromene, flindersine (FL), has been experimentally investigated and compared with that of a carbonyl group present in a structurally related unreactive heterocyclic compound, 6(5H)-phenanthridinone (PH). Through stationa…
The existence of magnetic and superconducting order in a ${[{({\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3})}_{100\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}}∕{(\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}})}_{100\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}…
Abstract The effects of sample length d 0 on the average breakdown electric field E B of ZnO–Bi 2 O 3 ‐based varistor materials containing oxides of Ce and Gd sintered in the temperature range from 1150 to 1200 °C were investigated. It is observed that E B decreases with increasing d 0 . The breakdown electric field E…
The anionic polymerization technique was investigated to prepare dendronized polymers (denpols) made of a polystyrene backbone and carbosilane dendrons. The monomers, namely 3,5-bis(3-triallylsilanylpropyloxy)styrene ( G1-bis ) and 3,4,5-tris(3-triallylsilanylpropyloxy) styrene ( G1-tris ), are fitted with respectivel…
Layered aggregates of gold nanoparticles were synthesized by injection of a methanol solution of HAuCl 4 into a mixture of octadecene (ODE) and oleylamine (OLA) at high temperature under the flow of argon, followed by sedimentation out of a toluene/ethanol mixture solvent. Interconnection of the nanoparticles into sin…
Density functional theory calculations have been carried out to investigate the electronic structures and the alpha/beta relative stability of Keggin-typed [XW(12)O(40)]n- anions with transition metal as heteroatom X (X = Cr(VI), V(V), Ti(IV), Fe(III), Co(III), Ni(III), Co(II) and Zn(II)). Nice agreement in geometries…
An attractive method for producing metal/polymer composite nanowires of controllable composition is achieved by dealloying alloy nanowires and ‘backfilling’ the pores with an electropolymerized film while the wires are inside the membrane template (see scheme). The versatile preparation route could be extended to dive…
Zirconium tetra(tert-butoxide) reacts with surface amide groups of polyamide nylon 6/6 to give (eta(2)-amidate)zirconium complexes in high yield. These surface complexes react to bond the cell-adhesive peptide arginine-glycine-aspartic acid (RGD) to the polymer surface. A surface loading of 0.18 nmol/cm(2) of RGD is a…
The ferromagnetic and electrical characteristics of in situ Mn-doped GaN nanowires fabricated in the absence of any catalyst are reported. The nanowires are of single-crystal hexagonal structure, containing Mn up to 2.5 atom %. Magnetism measurements indicate that the nanowires have room temperature ferromagnetism wit…
We devised a practical synthetic route to azobenzenophanes via successive Cu- and Pd-catalyzed coupling reaction of aryl hydrazide and aryl halide followed by Cu(I)-mediated oxidation reaction.
The properties of Fe-exchanged ferrierite were investigated by ab initio periodic DFT calculations. Stabilities of Al/Si substitutions were compared for all four irreducible tetrahedral (T) sites of the framework. For each T site, the most stable position of the extraframework Fe 2+ cation is located in the six-member…
Abstract The ring‐opening polymerization (ROP) of ε‐caprolactone (ε‐CL), 4‐methyl‐ε‐caprolactone (4‐MeCL), and 6‐methyl‐ε‐caprolactone (6‐MeCL) with a single‐site chiral initiator, R,R ′‐(salen) aluminum isopropoxide ( R,R ′‐[1]), was investigated. The kinetic data for the ROP of the three monomers at 90° in toluene c…
An ESR study has been made on the adsorption of three types of aminoxyl radicals with different substituent groups in the nanochannel of MCM-41 in benzene. In the suspensions of MCM-41, all the aminoxyl radicals, usually called as spin probes, show the ESR spectra composed of two signals: the main broader one from the…
Die chemische Verschiebung der Wasserprotonen in Liposomen von LIPOCEST-Kernspintomographiereagentien könnte um den Beitrag einer magnetischen Suszeptibilität des Materials verstärkt werden. Der Effekt wurde durch das osmotische Schrumpfen von Liposomen zu nichtsphärischen Kompartimenten erzielt. Die größten Verschieb…
MnSe one-dimensional nanostructures were synthesized by chemical vapor deposition and their morphology was tuned from nanowires to MnSe/silica core/shell nanocables and “peapods,” as well as nanocube-chain networks by adjusting the growth conditions. All of these MnSe nanocrystals had a single-crystalline rock-salt α-…
The use of single-walled carbon nanotube (SWNT) copolymers in polymeric formulations may lead to better alignment of fibers, thereby producing higher performance materials. Although poly( p -phenylene benzobisoxazole) (PBO) fibers are some of the strongest organic polymer fibers known, the introduction of SWNTs into t…
We study interfaces between highly ionic crystals with different crystal structure by means of first-principles total-energy calculations in the repeated-slab approximation, and compare the results with experimental data extracted from high-resolution transmission electron micrographs. Despite the same Bravais lattice…
Drp35 is a protein induced by cell wall-affecting antibiotics or detergents; it possesses calcium-dependent lactonase activity. To determine the molecular basis of the lactonase activity, we first solved the crystal structures of Drp35 with and without Ca(2+); these showed that the molecule has a six-bladed beta-prope…