Materials Literature
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Electron-spin-resonance (ESR) measurements have been performed on ${\mathrm{FeCr}}_{2}{\mathrm{S}}_{4}$ single crystals in the temperature range 4.2--200 K. On decreasing temperature, the resonance lines strongly shift to low fields for the easy magnetization direction, 〈100〉, and to high fields for the hard direction…
Abstract Linear copolymers that have pendant coumarin‐2 and coumarin‐343 chromophores were prepared as analogues to previously synthesized light‐harvesting dendrimers. The chromophore ratios within these polymers were maintained similar to those of the various generation dendrimers to investigate the effect of polymer…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPolymerization of Alkynes in the Channels of Mesoporous Materials Containing Ni and Zn Cations: Almost Complete Filling of the VoidsDavid J. Cardin, Steven P. Constantine, Andrew Gilbert, Alexander K. Lay, Mercedes Alvaro, Maria S. Galletero, Hermenegildo Garcia, and F…
By means of temperature programmed desorption (TPD), static secondary ion mass spectroscopy (SSIMS), and electron energy loss spectroscopy (EELS), we have investigated further the states of oxygen adsorbed on rutile TiO 2 . Previous work has shown that annealing the (110) surface in a vacuum produces isolated bridging…
Modern electronic devices are increasingly being designed by combining materials with different electronic properties. The conventional semiconductor industry has achieved this by building heterostructures, such as quantum wells and superlattices, from materials with the same crystal structure but different constituen…
Tetraphenylporphinatomanganate(III) tetracyanoethenide, [MnTPP][TCNE], is the prototype of a growing family of linear chain (1-D) coordination polymers that magnetically order as ferrimagnets. [MnTPP][TCNE].xS [S = PhMe (x = 2), 1,2-C(6)H(4)Me(2) (x = 1), 1,2-C(6)H(4)Cl(2) (x = 3), 1,2,4-C(6)H(3)Cl(3) (x = 2), and 1,3…
We synthesized hexagonal ${\mathrm{YMnO}}_{3}$ doped with tetravalent Zr ions and studied the electronic and magnetic properties. Zr substitution creates a mixed ${\mathrm{Mn}}^{3+}\ensuremath{-}{\mathrm{Mn}}^{2+}$ system, instead of the conventional ${\mathrm{Mn}}^{3+}\ensuremath{-}{\mathrm{Mn}}^{4+}$ of colossal mag…
Gold nanoparticles stabilized by alkanethiolates, alkaneselenides, and alkanetellurides have been prepared by analogous methods. Chloroform solutions of thiolate and selenide stabilized particles were spread and evaporated on the water/air interface where the particles formed well-defined Langmuir films. The films wer…
We present a formalism for an atomic scale study of phononic heat transfer. The expression of thermal energy current can be cast in the Landauer form and incorporates the transmission coefficient explicitly. Calculation of the thermal conductance of a monoatomic chain of N atoms between two reservoirs shows interestin…
Abstract Biopolymers are preferred ingredients for the manufacture of materials because they are based on abundantly available and renewable raw materials that have benign environmental problems associated with their production, fabrication, use, and disposal; however, the wide use of biopolymers in engineering applic…
The alpha-1 and alpha-2 isomers of the monovacant Wells-Dawson heteropolyoxoanion [P(2)W(17)O(61)](10-) are complexants of trivalent rare-earth (RE) ions and serve to stabilize otherwise reactive tetravalent lanthanide (Ln) and actinide (An) ions in aqueous solution. Aspects of the bonding of Ln ions with alpha-1-[P(2…
Adhesion theories raw materials for adhesives classification for adhesives individual adhesive systems (adhesives that set without a chemical reaction adhesives setting by chemical reaction) bonding techniques testing of adhesives applications of adhesives (bookbinding gluing of wood and wooden materials footwear adhe…
Photoinduced electron transfer in donor-bridge-acceptor systems with zinc porphyrin (or its pyridine complex) as the donor and gold(III) porphyrin as the acceptor has been studied. The porphyrin moieties were covalently linked with geometrically similar bridging chromophores which vary only in electronic structure. Th…
The present paper is concerned with the development of a micromechanical model of the hardening, rate-sensitivity and thermal softening of bcc crystals. In formulating the model we specifically consider the following unit processes: double-kink formation and thermally activated motion of kinks; the close-range interac…
We have performed molecular dynamic simulations of a Martensitic bcc->hcp transformation in a homogeneous system. The system evolves into three Martensitic variants, sharing a common nearest neighbor vector along a bcc <111> direction, plus an fcc region. Nucleation occurs locally, followed by subsequent growth. We mo…
We study the electronic structure of halogen-bridged binuclear metal $(\mathrm{MMX})$ complexes with a two-band Peierls-Hubbard model. Based on a symmetry argument, various density-wave states are derived and characterized. The ground-state phase diagram is drawn within the Hartree-Fock approximation, while the therma…
The epoxidation of ethene by a model for Compound I of cytochrome P450, studied by the use of density functional B3LYP calculations, involves two-state reactivity (TSR) with multiple electromer species, hence "multi-state epoxidation". The reaction is found to proceed in stepwise and effectively concerted manners. Sev…
Electrostatic force microscopy and scanning surface potential microscopy are applied to study force gradient and surface potential on ${\mathrm{BaTiO}}_{3}(100)$ surface. Surface potential evolution during a ferroelectric/paraelectric phase transition and the potential distribution near moving domain walls allow the r…
The degree of ionic/covalent character in oxides has a great influence on the electronic structure and the material's properties. A simple phenomenological rule is currently used to predict the evolution of covalence/ionicity in mixed oxides compared to the parent ones, and is also widely used to interpret the x-ray p…