Materials Literature
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Four new chiral series with benzoate cores have been synthesized and characterized. The mesomorphic properties have been analysed by optical microscopy on the pure enantiomeric and the racemic compounds and on mixtures, by D.S.C. and by electro-optic measurements. Three of the series (hydrogenous, monofluoro-substitut…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Acidity and Properties of Titania-Silica CatalystsMercedes Galan-Fereres, Luis J. Alemany, Rafael Mariscal, Miguel A. Banares, James A. Anderson, and Jose L. G. FierroCite this: Chem. Mater. 1995, 7, 7, 1342–1348Publication Date (Print):July 1, 1995Publication Histor…
Abstract Materials used in biomedical applications often function based upon their surface properties. Thus, understanding their surfaces is critical to the design and engineering of new biomaterials and medical devices. Modern surface analysis tools have been developed largely around the needs for the microelectronic…
We present a method for calculating, by computer simulation, the direct correlation function c(1,2) for a molecular liquid in the form of a spherical harmonic expansion. This allows us to test, at the most fundamental level, predictions of the structure of molecular liquids using density functional and integral equati…
The relation between the nature of the phase diagram and the pair potential is investigated on the basis of a recently introduced van der Waals theory. Both simple fluids and colloidal dispersions that admit a simple fluid description are considered. A necessary and sufficient condition for the occurrence of a liquid…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThiolato-Activated Oxo-Metal Bond Features in Molybdenum and Tungsten Oxidoreductase Models As Revealed by Raman SpectroscopyHiroyuki Oku, Norikazu Ueyama, and kira NakamuraCite this: Inorg. Chem. 1995, 34, 14, 3667–3676Publication Date (Print):July 1, 1995Publication Histor…
The electrical transport properties of epitaxial ZnO films grown on different orientations of sapphire substrates have been measured as a function of partial pressure of oxygen. After equilibration, the carrier concentration is found to change from a p ‐1/4 O2 to a p ‐3/8 O2 dependence with increasing oxygen partial p…
Abstract The design, synthesis, and properties of supermolecules consisting of well defined assemblies of linear and globular macromolecules is studied. Therefore, several families of hybrid block polymers based on polyether dendrimers linked to well‐defined blocks of polyethylene oxide, polyethylene glycol, polyester…
In the framework of microscopic theory of structural phase transitions on the basis of the cooperative Jahn-Teller effect, the phase diagrams of the ${\mathrm{Tm}}_{\mathit{x}}$${\mathrm{Lu}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{PO}}_{4}$ and ${\mathrm{Tb}}_{\mathit{x}}$${\mathrm{Y}}_{1\mathrm{\ensuremath{-}…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemote Hydrogen Plasma Chemical Vapor Deposition of Amorphous Hydrogenated Silicon-Carbon Films from an Organosilane Molecular Cluster as a Novel Single-Source Precursor: Structure, Growth Mechanism, and Properties of the DepositA. M. Wrobel, S. Wickramanayaka, Y. Nakanishi,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic-Inorganic Polymeric Hybrids Involving Novel Poly(hydroxymethylsiloxane)Shaoxiang Lu, Miryam M. Melo, Jianqun Zhao, Eli M. Pearce, and T. K. KweiCite this: Macromolecules 1995, 28, 14, 4908–4913Publication Date (Print):July 1, 1995Publication History Published online1…
We have studied the mesophase behaviour and structure of certain dimeric compounds, the α,ω-bis(4-n-alkoxyazobenzene-4′-carbonyloxy)alkanes, in which two azobenzene moieties with alkoxy tails are linked by a polymethylene spacer. The effect of the length of the (CH2)n spacer was examined by preparing four series of th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoreactive Supramolecular Assemblies: Aggregation and Photoisomerization of Azobenzene Phospholipids in Aqueous BilayersXuedong Song, Jerry Perlstein, and David G. WhittenCite this: J. Am. Chem. Soc. 1995, 117, 29, 7816–7817Publication Date (Print):July 1, 1995Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure, Thermochemistry, and Magnetic Properties of Binary Copper Carbonyls by a Density-Functional ApproachVincenzo BaroneCite this: J. Phys. Chem. 1995, 99, 30, 11659–11666Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published iniss…
The effect of ascending additions of fine TiO2 powder on the porosity of a hand mixed polyurethane foam system was studied. Voidage was sustained in the 95% region up to 20 vol% powder addition based on the polymer. Loss of powder from the windows occurred below this level and a reticulate structure was obtained on si…
Genuine incommensurate smectic A phases were recently discovered, among the rich polymorphism of a new dimesogenic liquid crystal compound (KI5). In the present paper, we examine the role played by molecular parameters in the existence of such incommensurate state. In a series of several homologues of KI5, we find tha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Thermal Properties of New Comblike Polyamides: Helical Poly(.beta.-L-aspartate)s Containing Linear Alkyl Side ChainsF. Lopez-Carrasquero, S. Montserrat, A. Martinez de Ilarduya, and S. Munoz-GuerraCite this: Macromolecules 1995, 28, 16, 5535–5546Publication Dat…
We describe an experimental technique that allows for the direct determination of the motion (i.e., the momentum) of electrons in atoms, molecules, and solids. This ($e$, $2e$) technique centers on a fast electron's ejecting a second electron from a target. Precise spectroscopy of both electrons' final energies and mo…
Remote argon plasma (RP) and ozone in the presence of ultraviolet light (UV–O3) were used to render polystyrene (PS) surfaces hydrophilic in a controlled manner for eventual application in cell-surface interaction studies. X-ray photoelectron spectroscopy (XPS) was used to characterize both methods of modification. Th…
Liquid crystal (LC) mixtures of a reactive diacrylate and a commercial ferroelectric liquid crystal (FLC) mixture were produced. The mixtures were brought into cells provided with orientation layers in which various orientations such as uniaxial and twisted orientations, could be induced. When the desired orientation…