Materials Literature
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We report the synthesis, crystal structure, physical properties and hydrolysis kinetics of [(O)(tmpa)V(IV)(&mgr;-O)V(V)(tmpa)(O)](3+) (tmpa = tris(2-pyridylmethyl)amine), the first cation in its class for which both solid state and solution-phase characteristics are fully consistent with expectations for a Robin-Day t…
Complexation of a bipyridine-based nitronyl nitroxide biradical with nickel(II) affords two complexes that differ by the nature of one axial ligand and by their magnetic behaviour: in both cases ferromagnetic interactions between high-spin nickel(II) and the radicals are observed.
The synthesis and mesomorphic properties of a homologous series ofN-(2-hydroxy-4-n-alkoxybenzylidene)-3′,4′-di-n-alkoxylanilines and their copper(ii) complexes bis[(N-3′,4′-dialkoxyphenyl)-4-n-alkoxylsalicylaldiminato]copper(ii) are reported. The disc-like copper complexes exhibited columnar hexagonal disordered mesop…
A wide variety of extracted and synthesised drug molecules have electron transfer capabilities which allow them to generate reactive oxygen species (ROS). In particular, many antibiotics that kill or inhibit bacteria, yeasts and cancer cells readily transfer electrons to oxygen making superoxide and hydrogen peroxide…
Simulation of surfaces and grain boundaries of α-alumina were carried out by the molecular dynamics method using an ionic pair potential. Simulation of five different surfaces, (1101), (1104), (1102), (1120), (0001), showed that, although a distorted structure formed at the surface, the calculated surface energies (γs…
The thermal resistance of the attachment between a die and its carrier contributes strongly to the total temperature rise in an electronic system. The die attach resistance often differs substantially from the value predicted using the bulk thermal conductivity of the attachment material because of partial voiding and…
The purpose of the study was to investigate the staining mechanism of acid fuchsin and Sirius red. Acid (poly-glutamic acid), neutral (poly-hydroxyproline) and basic (poly-arginine, poly-histidine, poly-lysine) poly-amino acids, collagen types I, II and III, and arginine- and lysine-containing histones were used as te…
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We have designed a hyper-Rayleigh scattering scheme to measure six scalar invariants of the squared hyperpolarizability tensor β2. Our theoretical approach expresses the rotational invariants of the irreducible β components as scalars, which eliminates the need for difficult frame transformations. We applied our schem…
The stability of A1H3SiO 2+, the aqueous complex formed in acid solutions between AI 3+ and H4SiO4~ has been recently quantified in the temperature range 25-300~ at Psat (Pokrovski et al., 1996; Salvi et al., 1998). It was found that the stability of A1H3SiO] + strongly increases with temperature and this complex can…
The immobilisation of molybdate on Mg,Al-LDH leads to an active, heterogeneous catalyst that generates singlet molecular oxygen from hydrogen peroxide in the absence of soluble base.
Spacecraft flying in a low Earth orbit environment require thermal blankets to provide protection from direct solar heat from the sun. Fluorinated ethylene propylene copolymer is one of the major components of these thermal blankets. In this study, the effect of a simulated low Earth orbit environment on FEP was inves…
We study microscopic and macroscopic dynamical properties of a frustrated lattice gas showing the violation of Stokes-Einstein law. The glassy behaviors are analyzed and related with experimental results in glass former systems.
We define a new parameter to describe the effects of elastic electron scattering in XPS and AES. The parameter is the ratio of emitted intensity from a layer of atoms located at a given depth in a solid calculated from theories that take into account and neglect elastic electron scattering. We have found that the corr…
The synthesis, characterization and mesogenic behaviour of the copper(ii) and oxovanadium(iv) complexes derived from phenyltetrazole and benzothiazole and their corresponding ligands are reported. The ligands did not exhibit mesomorphism, whereas the complexes form monotropic smectic A and smectic C mesophases. The me…
Sodium trititanate, Na 2 Ti 3 O 7 , with a zigzag layer structure produces a surface lattice O – radical upon UV irradiation and has the ability to decompose water to hydrogen and oxygen when ruthenium oxide is highly dispersed on the titanate.
Gold and silver vacuum-deposited island films were characterized by studying deposition variables such as film thickness, evaporation rate, and substrate temperature. For both metals, these parameters were correlated with the surface-enhanced Raman spectroscopy (SERS) effect and an increase in film thickness and low e…
The characterization of valence tautomeric cobalt complexes with an array of four states, each with different optical and magnetic properties, is reported and it is shown that they can interconvert reversibly between the four states either thermally or by redox processes.
The synthesis of β-cyclodextrin-based dendrimers 3 and 5 is described; using phenolphthalein as a UV–VIS active probe, it is shown that the binding cavities of these modified receptors retain their molecular recognition properties and can be employed as polyfunctional monomers in self-assembly.
Dopamine templated nanoporous silica gel films prepared via the hydrolysis and cocondensation of tetramethoxysilane with phenyltrimethoxysilane show an enhanced affinity for dopamine and its related structures relative to non-templated films.