Materials Literature
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A novel heterobimetallic system, 1∞[LCuIICoII(NCS)2] (1), was obtained by reacting the neutral mononuclear complex [LCu] with cobalt(II) acetate in the presence of potassium thiocyanate (L is the dianion of the Schiff base resulting from the 2 ∶ 1 condensation of 3-methoxysalicylaldehyde with 1,3-propanediamine). The…
Boron-doped diamond film grown on a titanium substrate (Ti/BDD) has shown certain stability with superior activity. The causes of its eventual failure may be the large thermal residual stress in the diamond film, which leads to the delamination of the film. A dissociation of TiC layer would collapse the diamond film a…
The structures of 2 ∶ 1 co-crystals of the n-alkylcarboxylic acids with pyrazine have been determined for methanoic acid to tridecanoic acid. For methanoic acid through to hexanoic acid, the co-crystal structures exhibit considerable variation. For heptanoic acid and longer acids, the structures display regularity, an…
We present X-ray photoelectron spectroscopy (XPS) and X-ray photoelectron diffraction (XPD) investigations of CuO thin films electrochemically deposited on an Au(001) single-crystal surface from a solution containing chiral tartaric acid (TA). The presence of enantiopure TA in the deposition process results in a homoc…
Complexation of lanthanide ions {Ln(III) ions [Tb(III), Eu(III), or Sm(III)]} with the spiropyran‐derived merocyanine obtained in dark and under steady irradiation of indoline spiropyran (1,3,3‐trimethyl‐5 ′ ‐hydroxy‐6 ′ ‐formyl‐indoline‐spiro‐2,2′‐[2H]chromene) induces a noticeable hypsochromic shift of about 10–110…
Reactions of [MCl2(tmeda)] with potassium salts of monoselenocarboxylic acids gave complexes of the general formula [M(SeCOR)2(tmeda)] (M = Zn, Cd; R = Ph, Tol; Tol = C6H4-p-CH3; tmeda = Me2NCH2CH2NMe2). The analogous mercury complexes were unstable at room temperature and afforded HgSe nanoparticles during the course…
The influence of the direction of ester linkage groups on the structural and electronic properties of five-ring banana-shaped molecules with a central 1,3-phenylene unit has been investigated including hexyloxy and dodecyloxy terminal chains. DFT studies on the B3LYP/6-31G(d) level were performed on the conformational…
A new one-pot synthetic method for preparing core/shell YF3@SiO2 nanoparticles with different morphologies, from spherical to elongated structures ("pearl necklace"), is described; absorbance and photoluminescence spectroscopy reveals intrinsic but no extrinsic defects in the YF3.
The conductivity of polyoctahedral silsesquioxanes [POSS-PEO ]-based electrolytes has been investigated as a function of ratio for , , , , , , and . increased with increasing salt concentration and poly(ethylene oxide) chain length . At high temperatures, , corresponding to low-viscosity conditions, conductivity incre…
Abstract Purpose – To investigate the efficacy of Congo red dye (CR) as an inhibitor of the acid corrosion of mild steel and aluminium alloy (AA 1060) and to assess the influence of halide ions on the inhibition efficiency. Design/methodology/approach – Corrosion rates were estimated by monitoring the weight losses of…
Nitroxide-mediated radical polymerizations of 4-vinylpyridine and sodium 4-styrenesulfonate were carried out on the surfaces of MWNT to afford poly(4-vinylpyridine)-grafted MWNT (MWNT-P4VP) and poly(sodium 4-styrenesulfonate)-grafted MWNT (MWNT-PSS). The covalent bonding of polymers to the MWNT surface was confirmed b…
Compósitos de polipropileno com 10, 20 e 30% em volume de fibra de coco verde foram obtidos em câmara de mistura Haake, tendo como variáveis a temperatura de processamento e a velocidade de cisalhamento. O módulo de flexão e as características morfológicas dos diferentes compósitos obtidos foram avaliados e comparados…
We report an experimental and theoretical study of the stability and solution structure of lanthanide complexes with two novel ligands containing pyridine units and phosphonate pendant arms on either ethane-1,2-diamine (L2) or cyclohexane-1,2-diamine (L3) backbones. Potentiometric studies have been carried out to dete…
The aim of this work was to study the feasibility of hyperbranched polymers as drug carriers by employing different microparticle formation methods and the influence of loading methods on release kinetics. Commercially available hyperbranched polyester (Perstorp) and three polyesteramides (DSM) were loaded with the ph…
The synthesis of SiC hollow spheres is reported. The shell of the spheres is formed through a solid–gas reaction rather than traditional chemical methods. The sphere size can be modulated from the microscale to the nanoscale, and the shell thickness can be finely tuned by adjusting the experimental parameters. This te…
Phosphorus containing and octyl-terminated silicon nanoparticles (NPs) are generated by a solution reduction route under room temperature conditions for the first time and characterized by TEM, HRTEM, EDX, 1H/13C/31P NMR, EPR, and PL spectroscopy, then annealed to form a thin film with phosphorus doping confirmed by m…
Poly( o -phenylenediamine) (PoPD) has been successfully electropolymerized by cyclic voltammetery on 304 stainless steel from sulfuric acid solution containing o -phenylenediamine monomer. Thin, adherent, and transparent layers of PoPD which have a ladder conductive polymer structure were formed. The layers facilitate…
Polycrystal gadolinium lithium fluorides (GdLiF4=GLF) have been investigated as magnetic materials for an adiabatic demagnetization refrigeration (ADR) system operating at 4 K. Because of difficulties in growing a single crystal of GLF, a polycrystalline sample was fabricated and investigated. The relative density of…
This paper describes the design, modeling, initial build and testing of a novel thermoelectric power generator (TPG), incorporating state of the art material technology with optimized thermal management. A numerical model simulates the operation of the device and facilitates its design. Advanced multi-parameter, gradi…
Abstract The reaction of organoalkoxysilanes with sodium hydroxide was studied in detail. Studies indicate that this reaction involves more than one stage and involves rather complex multistep process, which leads to the formation of both monosodiumoxyorganoalkoxysilanes (MSOAS) and several secondary products. Analysi…