Materials Literature
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The interaction of IrCl3(tht)3, tht = tetrahydrothiophene, and mesityl (2,4,6-trimethylphenyl, mes)-magnesium bromide in diethyl ether gives Ir(mes)3 as a very air-sensitive crystalline solid. Interaction of partially dehydrated IrCl3 with mesityllithium in Et2O gives the air-stable, paramagnetic Ir(mes)4. Interaction…
Several aluminas were synthesized from aluminium isopropoxide using some organic complexing agents as solvents. The difference in the properties, especially specific surface area, of the aluminas obtained was investigated. The thermal behaviour of the aluminas depended on the complexing abilities of the solvents used.…
Nickel oxide (NiOx) thin films have been prepared on transparent conducting indium tin oxide (ITO) substrates by anodic deposition from a nickel ammine complex solution. Electrochromic (EC) behaviour of these films was observed in a borate buffer solution at pH 10 in the potential range 0–1 V vs. Ag/AgCl; an as-prepar…
The reduction effect on CuCe oxide catalysts with an atomic ratio Cu : Ce = 0.01 has been studied mainly by EPR techniques. The surface species of copper(II) ion pairs and their precursors (Cu2+ ion monomers) were easily reducible by H2, C2H4 and CO. A bronze-like complex (HxCuCeO2) has been obtained before the beginn…
Various derivatives of the title complexes have been synthesized and demonstrated to form stable mesomorphic phases. They provide a new family of thermotropic liquid-crystalline complexes containing a carbon–metal σ-bond and a tertiary phosphine co-ordinated to a transition metal.
The water content of electrochemically deposited polyvinylferrocene films was studied using the electrochemical quartz crystal microbalance. Unhydrated films were introduced into aqueous sodium perchlorate solution. Using cyclic voltammetry, the mass and charge change accompanying electrochemical cycling between oxidi…
The adsorption isotherm and the enthalpy of adsorption of CO2 on oxides of oxygen-deficient magnetite have been studied by adsorption techniques. Oxygen-deficient magnetite was prepared by flowing H2 gas through magnetite powder at 300 °C. Adsorption of CO2 onto oxygen-deficient magnetite was studied in the temperatur…
The effects of phospholipid adsorption onto the polymer surface during adsorption of plasma proteins were investigated. When a polymer with the phosphorylcholine moiety, 2-methacryloyloxyethyl phosphorylcholine (MPC) co-polymer, was treated with dipalmitoylphosphatidylcholine (DPPC) liposome solution, an organized ads…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermotropic properties and conformational studies on poly(triethylene glycol p,p'-bibenzoate) and poly(octamethylene p,p'-bibenzoate)Ernesto Perez, Evaristo Riande, Antonio Bello, Rosario Benavente, and Jose M. PerenaCite this: Macromolecules 1992, 25, 2, 605–610Publication…
The thermally-stable coloured form 5a, obtained by irradiation (λ= 366 nm) of the title compound 4a, contains a rigid inflexible spiroadamantylidene group which results in a five- to nine-fold increase in the quantum efficiency for bleaching compared to the analogous compound 2 having methyl groups in the 7-position.…
All articles of this category The design and synthesis of a molecular shuttle, in which the two components are a cyclobis(paraquat- p -phenylene) tetracationic macrocycle and a linear polyether chain intercepted by a 2,3,5-trisubstituted indole unit and a hydroquinol residue, and terminated by two 4-tritylphenyl ether…
Using self-assembly strategies, catenanes consisting of zinc and free base porphyrins with hydroquinol-containing polyether straps of different lengths interlinked with a tetracationic bipyridinium cyclophane have been synthesised.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of phosphine ligands in gold cluster chemistry. Relativistic SCF calculations on Au2 and Au2(PH3)2Peter Schwerdtfeger and Peter D. W. BoydCite this: Inorg. Chem. 1992, 31, 2, 327–329Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Pu…
Optimal conditions of electroblotting that led to high protein recovery on polyvinylidene difluoride (PVDF) membranes were determined for sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). SDS concentrations in the gel and transfer buffer were found to be the most important factors affecting the amo…
The effects of nitrogen dioxide and ammonia on the semiconductivity properties of solution-deposited thin films of the tetra-substituted 15-crown-5, 18-crown-6 and 21-crown-7 metal-free and copper phthalocyamnes are reported. The 15-crown-5 films showed good reversible conductivity changes at room temperature in NO2 c…
Direct and quantitative probing of space charge was carried out to study effects of space charge on dielectric breakdown of polymeric insulating materials. In poly-p-phenylene sulfide, in which dielectric-breakdown characteristics were explained in terms of space-charge formation, positive homo space charge was observ…
A crystalline orientated interatomic-potential model, including the directionality of Si—O bonds, has been applied in molecular-dynamics simulations of the atomic-scale structures of x[yNa2O·(1 –y)K2O].(1 –x)SiO2 glasses. The structures of the mixed-alkali-metal silicate glasses were investigated both as a function of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure functionalization of diaza-crown ethers: new synthesis of silver(1+) ion-specific bindersHiroshi Tsukube, Hiroyuki Minatogawa, Megumi Munakata, Mitsuo Toda, and Kiyoshi MatsumotoCite this: J. Org. Chem. 1992, 57, 2, 542–547Publication Date (Print):January 1, 19…
Als Ausschnitte aus der V 2 O 5 ‐Schichstruktur (Bild rechts; verbrückende O‐Atome große schattierte, terminale O‐Atome große weiße und V‐Atome kleine weiße Kugeln) lassen sich die im Titel erwähnten, in jüngster Zeit hergestellten, neuartigen Polyvanadat‐Strukturen beschreiben und systematisieren. Diese im Gegensatz…
New phthalocyanines (M = Cu, Zn, Ni, Co or 2H) substituted with four 17-membered trioxadiaza macrocycles have been prepared. Detosylation of aza groups with concentrated sulfuric acid simultaneously leads to sulfonated groups on the aromatic rings of the macrocyclic substituents. While the N-tosylated derivatives are…