Materials Literature
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The nine-coordinate SmIII cation in [Sm{O2CCH(OH)CH(OH)CO2}{O2CCH(OH)CH(OH)CO2H}(OH2)3], or [Sm(C4H4O6)(C4H5O6)(H2O)3]n, is located on a crystallographic twofold axis. The coordination geometry is capped square-antiprismatic and is defined by four O atoms derived from carboxylate/carboxylic acid groups, two hydroxyl…
Tyrosine hydroxylase (TH) is the rate-limiting enzyme in the synthesis of catecholamines. We have studied the association of recombinant human TH with model membranes by using either liposomes or silica gel beads coated with single phospholipid bilayers (TRANSIL). The use of TRANSIL beads has allowed the determination…
The tangential thermal diffusivity D || and thermal conductivity k || of diamond plates grown from the gaseous phase by chemical vapour deposition (CVD diamond) are determined by the transient grating technique in the temperature range 25 — 200 °C. Samples of insulating and boron-doped polycrystalline diamond of thick…
This perspective examines quantum dot (QD) superlattices as model systems for achieving a general understanding of the electronic structure of solids and devices built from nanoscale components. QD arrays are artificial two-dimensional solids, with novel optical and electric properties, which can be experimentally tun…
Ab initio studies of the stability of orbital ordering, its coupling to magnetic structure and its possible origins (electron-phonon and/or electron-electron interactions) are reported for two perovskite systems, ${\mathrm{LaMnO}}_{3}$ and ${\mathrm{KCuF}}_{3}.$ We present an average spin state calculational scheme th…
Abstract We report the ring‐opening homopolymerization of α‐allyl(valerolactone), compound 2 , and its copolymerization with ε‐caprolactone and δ‐valerolactone using stannous(II) catalysis. Although the polymerization of substituted δ‐valerolactones has received little attention for the preparation of functional polye…
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Tetra- and dinuclear Zn(II) N-confused porphyrin dimers (1, 2) and pyridine-coordinating Zn(II) monomer complex (3) were synthesized, and the ditopic, inner and outer coordination of Zn metal in the dimer complex (1) was demonstrated by X-ray analyses.
Data on the study of the influence of accelerated ion beams on polymeric materials are generalised. The mechanisms ofbeams on polymeric materials are generalised. The mechanisms of chemical processes occurring in a polymer matrix upon ionchemical processes occurring in a polymer matrix upon ion implantation and result…
Theoretical studies of transition metal complexes with nitriles and isocyanides are reviewed. The electronic structures and the nature of coordination bonds in these complexes are discussed. The correlation between the electronic structures of transition metal complexes with nitriles and isocyanides and their structur…
The structure of the glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) from Trypanosoma cruzi complexed with chalepin, a natural product from Pilocarpus spicatus, has been determined by X-ray crystallography to 1.95 A resolution. The structure is in the apo form without cofactors in the subunits of the tetr…
This is a multinanosecond molecular dynamics study of a bio-nano complex formed by a carbon nanoparticle, a buckyball C(60), and a biological molecule, an antibody, with high binding affinity and specificity. In the simulation, the ball is completely desolvated by the binding site of the antibody by means of a nearly…
Abstract Three different biodegradable polyesters, namely, polycaprolactone (PCL), polybutylene succinate (BIONOLLE), and a copolyester of adipic acid, terephthalic acid, and 1,4‐butanediol (EASTAR) were melt‐blended using a twin‐screw extruder. The percentage composition of each of the aforementioned polymers was var…
The spin transition between the paramagnetic high-spin (HS) and low-spin (LS) electronic states of ${\mathrm{Co}}^{\mathrm{II}}{(\mathrm{H}}_{2}{(\mathrm{fsa})}_{2}{\mathrm{e}\mathrm{n})(\mathrm{py})}_{2},$ $[{\mathrm{H}}_{2}{(\mathrm{fsa})}_{2}{\mathrm{e}\mathrm{n}=\mathrm{N},\mathrm{N}}^{\ensuremath{'}}$-ethylene bi…
Effects of added surfactants in the acidic hypophosphite plating baths on the properties of the resulting electroless nickel−phosphorus (Ni−P) deposits on the brass substrates were studied. The surface appearance and microstructures were examined under a reflective optical microscope and a scanning electron microscope…
Tessellation of nine free-base porphyrins into a 3 x 3 array is accomplished by the self-assembly of 21 molecular entities of four different kinds, one central, four corner, and four side porphyrins with 12 trans Pd(II) complexes, by specifically designed and targeted intermolecular interactions. Strikingly, the self-…
We describe the second of two large-scale atomic simulation projects on materials failure performed on the 12-teraflop ASCI (Accelerated Strategic Computing Initiative) White computer at the Lawrence Livermore National Laboratory. This investigation simulates ductile failure by using more than one billion atoms where…
The current methods of synthesis and investigation of carbon nanotubes are reviewed. The interconnection between structural peculiarities and electronic characteristics of carbon nanotubes has been studied. The recently developed methods of growth of similar nanotubes with pre-assigned characteristics are described. T…
Rosette nanotubes are a new class of organic nanotubes obtained through the hierarchical self-assembly of low molecular weight synthetic modules in water. Here we demonstrate that these materials can serve as scaffolds for the supramolecular synthesis of multichannel nanotubular architectures and report on the discove…
Despite its remarkable materials properties, the structure of spider dragline silk has remained unsolved. Results from two probe microscopy techniques provide new insights into the structure of spider dragline silk. A soluble synthetic protein from dragline silk spontaneously forms nanofibers, as observed by atomic fo…