Materials Literature
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Efficient syntheses are reported for tetraiodotetrathiafulvalene 2, 4-iodo-5-methyl-4′,5′-bis(methylsulfanyl)TTF 3, and 4-iodo-4′,5′-bis(methylsulfanyl)TTF 4 by iodination, using perfluorohexyl iodide, of lithiated derivatives of the corresponding TTF system. Bromination and chlorination of lithiotrimethylTTF using 1,…
This paper presents a generalized 2-D tensor finite element model, which can be used to evaluate force components in electromagnetic devices including those due to the magnetostrictive phenomenon. Magnetostriction is a property of ferrous alloys in which the material will exhibit strain in the presence of magnetic fie…
Corrosion products formed on copper plates exposed in urban, rural/coastal, and hot spring areas in Japan were characterized by X-ray photoelectron spectroscopy, X-ray diffraction (XRD), and coulometric reduction. The exposure tests were carried out for a month in summer. XRD patterns showed that hydrated copper sulfa…
Poly[(3,4-ethylenedioxy)pyrrole-2,5-diyl] (PEDOP) and poly[(3,4-propylenedioxy)pyrrole-2,5-diyl] (PProDOP) were synthesized by in situ chemical polymerization yielding highly transmissive, conductive and electroactive thin films. PProDOP coatings exhibit a surface resistivity of 16 kΩ □−1 at 60% and 58 kΩ □−1 at 99.9%…
The light induced excited spin state trapping LIESST and the reverse LIESST-like phenomena are observed below and above the spin transition temperature, respectively, for new dinuclear diiron(II) complexes and familiar Fe(II) complexes with thiocyanate ligands by monitoring the Raman spectra where only excitation ligh…
The potential cytotoxicity on vascular smooth muscle cells of corrosion products from 316 L stainless steel, one of most popular biomaterials of intravascular stents, has not been highlighted. In this investigation, 316 L stainless steel wires were corroded in Dulbecco's modified eagle's medium with applied constant e…
The catalytic hydroxylation of alkanes by an electron-deficient cobalt(III) porphyrin complex and m-chloroperbenzoic acid yielded alcohols as major products with a high kH/kD value, >99% retention of stereochemistry, and a high regioselectivity; a high-valent cobalt–oxo porphyrin complex was suggested as a reactive hy…
A series of six dye-functionalized Nd3+ complexes have been synthesized and their photophysical properties have been studied and evaluated. The incorporated dyes dansyl, coumarine, lissamine, and Texas Red possess broad and intense absorption bands in the visible spectral region and therefore are ideally suitable as p…
Copolymers containing Ru(bpy)3 and coumarin-2 chromophores prepared using both grafting and copolymerization approaches exhibit Förster-type energy-transfer efficiencies ranging from 70% to above 98%.
The optical absorbance spectrum of LB film assemblies of 5,10,15,20-tetrakis[3,4-bis(2-ethylhexyloxy)phenyl]-21H,23H-porphine (EHO) is highly sensitive to low concentrations of NO2 in nitrogen. LB films prepared at much faster than conventional deposition rates (∼1000 mm min−1) yield t50 response and recovery times of…
Polystyrene microspheres coated with cationic surfactants are easily prepared by microemulsion polymerization. These microspheres can be used in place of surfactants to synthesize porous silica foams. The nature of the foams depends strongly upon the synthesis conditions. Under basic catalysis, “closed-cell” foams are…
Two series of hexakis(alkyloxy)triphenylenes have been synthesised and characterised. All materials contain two different lengths of n-alkyloxy chains. Series I (C5Cn) materials contain three –OC5H11 chains and three –OCnH2n + 1 chains. Series II (CmCn) materials contain three –OCmH2m + 1 chains and three –OCnH2n + 1…
The evolution of globular and dendritic structures in solidification of an Al–7mass%Si alloy has been investigated by a modified cellular automaton model (MCA). Besides retaining the probabilistic aspects of the classical CA model for the heterogeneous nucleation and the preferential growth orientations of the nuclei,…
Saline and sodic soils pose major agronomic problems in arid and semiarid regions. Marsh soils in the Guadalquivir Valley are representative of saline and sodic soils in estuarine environments, and are frequently reclaimed for agricultural use. Flooding affects the nature of P sorbent surfaces in soils; it increases t…
Oligothiophenes coupled to cyclophanes are shown to exhibit interesting optical properties. The molecule shown in the Figure is synthesized by dimerizing a substituted bithiophene using iron trichloride. The materials are thought to have potential in nonlinear optical and light-emitting diode applications.
Abstract The study of the effectiveness of several potential copper corrosion inhibitors in acidic media was studied. The investigated thiazole derivative functional groups contain heterocyclic atoms such as nitrogen, sulfur, and oxygen. Thiazole derivatives, 5-benzylidene-2,4-dioxotetrahydro-1,3-thiazole (BDT) 5-(4¢-…
A simple route to tetraaryltetrabenzoporphyrins (Ar4TBPs) is developed; the procedure allows for the introduction of substituents on both benzo- and phenyl-rings and employs readily available, inexpensive components.
Nanocrystalline ferrite formation by ball milling in pure Fe (0.004 mass% C) has been studied through morphology observation and microhardness measurements. It was found that nano-ferrite first formed at the outer surface area in the powders at the early stage of ball milling, which was attributed to the deformation l…
Two new extended chromophoric systems, in which a 4-aminoazobenzene moiety is linked to a cyclo-bridged hexatriene electron withdrawing group, have been synthesized, and show large optical nonlinearities and unexpected blue-shifted absorption in comparison with shorter chain analogues.
Self-Induced Voltage Oscillations during Anodic Etching of n-InP and Possible Applications for Three-Dimensional Microstructures , Langa, S., Carstensen, J., Tiginyanu, I. M., Christophersen, M., Föll, H.