Materials Literature
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We report results obtained from Monte Carlo simulations investigating mesophase formation in two model systems of hard pear-shaped particles. The first model considered is a hard variant of the truncated Stone-expansion model previously shown to form nematic and smectic mesophases when embedded within a 12-6 Gay-Berne…
The syntheses of two distinctive types of indium complex derived from trimethylindium (InMe(3)) are reported. The first kind has a generalized structural formula [InMe(2)(amak)](2), where (amak)H is an abbreviation for a series of chelating amino alcohol ligands HOC(CF(3))(2)CH(2)NHR, R = (CH(2))(2)OMe (1), Me (2), an…
Computer modeling techniques, which were employed to investigate the effect of water on the reactivity and stability of a SiO 2 nanotube, show that the side of the nanotube is relatively resistant to dissociative chemisorption and silicon dissolution but that the end of the nanotube is highly reactive toward water and…
Azamethine dyes of the merocyanine type [4-(N,N-di-n-butylamino)-2-methylphenyl][2,4-di-keto-3-[N'-(n-hexyl)]-5-cyano-6-methyl-3-pyridinio]-1-azamethine (1) and [4-(N,N-diethylamino)-2-(N'-tert-butylcarboxy)-amidophenyl]-[2,4-diketo-3-[N"-(n-hexyl)]-5-cyano-6-methyl-3-pyridinio]-1-azamethine (2) have been used as surf…
We performed molecular dynamics simulations of water confined to hydrophobic slit nanopores. Two five-site potential models of water were employed: the ST2 model and the TIP5P model. The simulations confirm our previous simulation results on basis of the four-site TIP4P model of water, that is, upon cooling the confin…
Depolymerization of an engineering plastic, poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), was accomplished by using 2,6-dimethylphenol (DMP) under oxidative conditions. The addition of an excess amount of DMP to a solution of PPO in the presence of a CuCl/pyridine catalyst yielded oligomeric products. When PPO (M(n)=1…
Abstract A novel reactive flame retardant, (4‐diethoxyphosphoryloxyphenoxy)(4‐hydroxyphenoxy)cyclotriphosphazene (EPPZ), was prepared and characterized by FTIR, 31 P‐NMR, and 1 H‐NMR analyses. Polyurethanes that contain (aliphatic phosphate)cyclotriphosphazene, with various phosphorus contents, were prepared from EPPZ…
The electron transfer (ET) properties of a series of closely related cobalt porphyrins, [2,3,7,8,12,13,17,18-octafluoro-5,10,15,20-tetrakis(pentafluorophenyl)porphyrinato]cobalt, CoF(28)TPP, [2,3,7,8,12,13,17,18-octafluoro-5,10,15,20-tetraphenyl)porphyrinato]cobalt, CoF(8)TPP, 5,10,15,20-tetrakis(pentafluorophenyl)por…
Abstract In the first part of this series of articles, the relations between the foaming conditions and the microstructure of expanded polystyrene (EPS) were explored. In this part, the effects of the foaming conditions and the microstructure of EPS on impact properties are discussed. Regression analysis was conducted…
Direct templating with lyotropic liquid crystalline phases of nonionic surfactants has now been extended to fabricate mesoporous crystalline oxide semiconductors. ZnO and Cu 2 O films have been prepared on ITO-covered glass substrates by electrochemical deposition from lyotropic liquid crystalline phases with polyoxye…
The influence of the lanthanide ion and the chain length on the thermal properties of bis[2,3,9,10,16,17,23,24-octakis(alkoxy)phthalocyaninato]lanthanide(III) complexes, denoted in the following as [(C n H 2 n +1 O) 8 Pc] 2 Ln, have been investigated. Two series of complexes were considered: a first series in which th…
Biomimetic synthesis of biocompatible ceramic material, calcium hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2, was performed exclusively inside poly(allylamine)/poly(styrene sulfonate) polyelectrolyte capsules of micron scale. Calcium hydroxyapatite mainly forms on the inner side of the capsule shell resulting in empty compos…
Abstract In this study, processing‐structure relationships in expanded polystyrene (EPS) made using near‐critical carbon dioxide as a physical blowing agent were investigated. In order to investigate the relationship between structure and properties of EPS it was necessary to be able to make samples with a wide range…
Wide-angle X-ray scattering patterns from proteins in solution contain information relevant to the determination of protein fold. At relevant scattering angles, however, these data are weak, and the degree to which they might be used to categorize the fold of a protein is unknown. Preliminary work has been performed a…
Individual and thin bundles of aminopolymer-functionalized single-walled carbon nanotubes (SWNTs) were successfully imaged using high-resolution transmission electron microscopy (HR-TEM). The corresponding electron energy loss spectroscopy (EELS) characterization of the same TEM specimen before and after ex situ therm…
The dynamics of water around a biomolecular surface has attracted a lot of attention recently. We report here protein-solvent simulation studies of the small globular protein ubiquitin (human). The simulations are run unconstrained, without freezing the bonds. The mean square displacements of the water oxygen atoms sh…
Two highly substituted azulene derivatives were synthesised by Pd-mediated dimerisation from the corresponding tolan species. One azulene derivative (2) has donor functionalities (dianisylaminophenyl and dianisylamino) in the 1-, 2-, 3- and 6-positions, while the other (1) has donors (dianisylaminophenyl) in the 2- an…
Abstract In the previous two parts of this series of articles, the relations among the foaming conditions, microstructure, and impact properties of expanded microcellular polystyrene (EPS) were discussed. In this article, the effects of the foaming conditions and structure on the tensile properties of EPS were investi…
Abstract. The effects of three plant species, Calotropis procera , Zygophyllum gaetulum and Peganum harmala on survival, feeding behaviour and reproduction in the desert locust ( Schistocerca gregaria ) were studied under laboratory conditions. The species originate in Moroccan arid areas and were seen to be avoided b…
The preparation and structural characterization of the novel polyoxoanion [(alpha-1,2,3-P(2)W(15)Ti(3)O(62))(4)[mu(3)-Ti(OH)(3)](4)Cl](45-) (1 a; abbreviated to [TiO(6)](16); FW approximately 16 000) which consists of four tri-Ti(IV)-1,2,3-substituted alpha-Dawson substructures, four Ti(OH)(3) bridging groups, and one…