Materials Literature
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We present the synthesis and structural characterization of a transition metal oxide hydride, LaSrCoO3H0.7, which adopts an unprecedented structure in which oxide chains are bridged by hydride anions to form a two-dimensional extended network. The metal centers are strongly coupled by their bonding with both oxide and…
Abstract The interactions of carbon dioxide and carbon monoxide at moderately high pressures with clean iron surfaces have been studied using x‐ray photoelectron spectroscopy (XPS) and static time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS). Clean iron surfaces were analysed after exposure to CO 2 or CO gas h…
In cavitation experiments with deuterated acetone, tritium decay activity above background levels was detected. In addition, evidence for neutron emission near 2.5 million electron volts was also observed, as would be expected for deuterium-deuterium fusion. Control experiments with normal acetone did not result in tr…
The luminescence properties of chemically prepared gold nanoclusters, each composed of a 28-atom core and a glutathione (GSH) adsorbate layer consisting of 16 molecules, were investigated. These clusters show a distinct absorption onset at 1.3 eV corresponding to the opening of an electronic gap within the conduction…
The exact solution of Maxwell's equations in the presence of arbitrarily shaped dielectrics is expressed in terms of surface-integral equations evaluated at the interfaces. The electromagnetic field induced by the passage of an external electron is then calculated in terms of self-consistently obtained boundary charge…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTOrganometallic Chemistry on Silicon and Germanium SurfacesJillian M. BuriakView Author Information Department of Chemistry, 1393 Brown Laboratories, Purdue University, West Lafayette, Indiana 47907-1393 Cite this: Chem. Rev. 2002, 102, 5, 1271–1308Publication Date (Web):March 8,…
The in vitro hydrolysis of a series of copoly(ester amide)s abbreviated as PVGA n, prepared previously by random copolymerization of 1-amino-1-deoxy-2,3,4-tri- O -methyl-5- O -[(pentachlorophenoxy)succinyl]- l -arabinitol hydrochloride and 5-amino-1- O -[(pentachlorophenoxy)glutaryl]pentanol hydrochloride, has been pe…
Abstract Thin starch coatings were deposited onto polyethylene (PE) film surfaces when PE films were immersed in 1% jet cooked starch solutions and the hot solutions were allowed to cool. Normal cornstarch, waxy cornstarch, high amylose cornstarch, and solvent‐extracted normal cornstarch (to remove native lipid) were…
Thermolysis of N-trialkyl borazines at 500 degrees C produces homogeneous, amorphous boron carbonitride phases, whose compositions are dependent upon the borazine substituent, and whose structures are similar to that of icosahedral boron carbide, B4C.
We report on the atomic force microscope observation of an electrostatic force between glass surfaces immersed in cyanobiphenil liquid crystals. The measured force is repulsive and decays exponentially with increasing surface separation. A mean field description of the electrostatic interaction in liquids has been use…
Bimetallic tris-oxalato-salts (n-CnH2n+1)PPh3MIIFeIII(C2O4)3 (n = 3–7, MII = Mn, Fe) were prepared and the structures investigated by powder X-ray diffraction in order to study the evolution of the structure and magnetic properties as a function of alkyl chain length. The compounds all have the same two-dimensional ho…
Abstract The syntheses of amphiphilic AB‐type diblock copolymers composed of hydrophobic polylactide segment and hydrophilic polydepsipeptide segment with amino or carboxyl groups were performed. The protected cyclodepsipeptides cyclo[Glc‐Lys(Z)] and cyclo[Glc‐Asp(OBzl)] (where Glc is glycolic acid, Lys is lysine, Asp…
Kanonerovite, MnNa 3 P 3 O 1 0 .12H 2 O [a = 14.71(1) A, b = 9.33(1) A, c = 15.13(2)A, β = 89.8(1)°, V = 2075(3) A 3 , P2 1 /n, Z = 4], is the first described triphosphate mineral. It has been found in the Kazennitsa pegmatite vein, the Alabashka pegmatite field, Middle Urals, Russia. Associated minerals are quartz, a…
Abstract The thermal decomposition mechanism of maleated poly(3‐hydroxybutyrate) (PHB) was investigated by FTIR and 1 H NMR. The results of experiments showed that the random chain scission of maleated PHB obeyed the six‐membered ring ester decomposition process. The thermal decomposition behavior of PHB and maleated…
Multiplet splittings for several excited configurations of [Co(II)W(12)O(40)](6-) were calculated using DFT methods. In agreement with the experimental interpretation of the spectrum the calculations found that the first strong band corresponds to Co d-d transitions, but it is worth noting that superposed to these tra…
Abstract Poly(L‐lactide)‐poly(ethylene glycol) multiblock copolymers with predetermined block lengths were synthesized by polycondensation of PLA diols and PEG diacids. The reaction was carried out under mild conditions, using dicyclohexylcarbodiimide as the coupling agent and dimethylaminopyridine as the catalyst. Th…
Atactic poly( R, S -3-hydroxybutyrate) (a-PHB) was synthesized by anionic polymerization of β-butyrolactone with potassium methoxide as an initiator. This completely amorphous polyester is capable of forming a crystalline inclusion complex (IC) with γ-cyclodextrin (γ-CD) adopting a channel structure. There is no evide…
We propose that a chain of five-membered rings (polyaminotriazole) should be ferromagnetic with an appropriate doping that is envisaged to be feasible with a field-effect transistor structure. The ferromagnetism is confirmed by a spin density functional calculation, which also shows that ferromagnetism survives the Pe…
Inelastic x-ray scattering data have been collected for liquid sodium at T=390 K, i.e., slightly above the melting point. Owing to the very high instrumental resolution, pushed up to 1.5 meV, it has been possible to determine accurately the dynamic structure factor S(Q,omega) in a wide wave-vector range, 1.5-15 nm(-1)…
Open single-walled carbon nanotubes (SWNTs) are attractive as potential storage media for hydrogen gas. The present paper investigates the micropore structure of HiPco SWNTs samples, as studied by nitrogen and argon adsorption technique at low pressures. The proportion of open SWNT is estimated with the Horvath−Kawazo…