Hydrogen-bond tuning of macroscopic transport properties from the neutral molecular component site along the sries of metallic organic-inorganic solvates (BEDT-TTF)4Re6Se5Cl9.[guest], [guest = DMF, THF, dioxane]
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Preparation of Barium Titanates from Oxalates
The decomposition of mixed barium titanium oxalates was studied by means of various thermochemical as well as spectroscopic methods. Infrared (IR) spectra of the mixed oxalates indicate the existence of an octahedral complex with Ti chelated by oxalate groups. In general, the results of both IR and the thermochemical…
Controlled photocycloaddition of unsaturated carboxylates intercalated in hydrotalcite clay interlayers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlled photocycloaddition of unsaturated carboxylates intercalated in hydrotalcite clay interlayersKatsuhiko Takagi, Tetsuya Shichi, Hisanao Usami, and Yasuhiko SawakiCite this: J. Am. Chem. Soc. 1993, 115, 10, 4339–4344Publication Date (Print):May 1, 1993Publication His…
Ferromagnetic spin alignment in molecular systems: an orbital approach
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic spin alignment in molecular systems: an orbital approachChristian Kollmar and Olivier KahnCite this: Acc. Chem. Res. 1993, 26, 5, 259–265Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.a…
Isolation and characterization of the chains of type V/type XI collagen present in bovine vitreous
Previous studies show that the collagen fibrils of the mammalian vitreous humor are assembled largely from type II collagen with smaller amounts of type IX collagen and either type V or type XI collagen. In this paper, we report the separation of two chains of type V/type XI collagen from type II collagen by heparin-S…
Analytical electron microscopy and Raman spectroscopy studies of carbon nitride thin films
Deposition of carbon nitride thin films on Si(100) and polycrystalline Zr substrates was performed by dc magnetron sputtering of a graphite target under a pure nitrogen ambient. The resulting carbon nitride films (CNx) are primarily amorphous with a small volume fraction of nanocrystallites. Both energy-dispersive x-r…
Virial expansion for ionic mixtures: Point-counterion model
A binary mixture of hard-sphere polyions and monovalent point counterions is studied using the virial expansion (VEX) of the Ornstein-Zernike equation. The zero-order VEX term, which coincides with the symmetrized Poisson-Boltzmann equation (SPB), exhibits an attraction among polyions at sufficiently high temperatures…
Structural statements, coordination numbers and water vapour solubility in aluminate slags
The IR emission of liquid CaO-Al2O3 slags is caused by IR active molecule vibrations of and -complexes. In the liquid CaO-Al2O3 slags the equilibrium dominates. At lower temperatures (1000°C) the formation of condensed -complexes was observed (glassy state). By the addition of B2O3 to CaO-Al2O3 slags B-O-Al associatio…
Comprehensive Study on LiF:Cu,Mg,P (GR-200 A)
Abstract The main properties of a new thermoluminescent (TL) material (LiF:Cu,Mg,P) produced in the People's Republic of China under the name of GR-200A have been already investigated by others. The purpose of this work is to establish a standardised procedure for use. Careful experiments were carried out with the aim…
Contamination of Ultrapure Systems by Back‐Diffusion of Gaseous Impurities
Diffusion of impurities against the direction of gas flow can be a significant source of contamination in the ultrapure gas systems. The mechanism and the kinetics of impurity transport due to back‐diffusion is studied both experimentally and theoretically. A model is developed to simulate the process and calculate th…
Transport coefficients of oligo- and poly(dimethylsiloxanes) in dilute solutions. The draining effect
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransport coefficients of oligo- and poly(dimethylsiloxanes) in dilute solutions. The draining effectTakeshi Yamada, Hitoshi Koyama, Takenao Yoshizaki, Yoshiyuki Einaga, and Hiromi YamakawaCite this: Macromolecules 1993, 26, 10, 2566–2574Publication Date (Print):May 1, 1993P…
Comb‐like poly(aryl‐ether‐ketones) containing naphthalene moieties in the main chain
Abstract 1,5‐Naphthalenediol was alkoxylated with 1‐alkyl bromides containing 3‐16 C‐atoms and then acylated with 4‐fluorobenzoyl chloride under Friedel‐Crafts conditions in 4‐ and 8‐position of the naphthalene ring. These new difluorides ( 3a–d ) were condensated with hydroquinone, bisphenol‐A and 4,4′‐biphenyldiol,…
FT-IR Characterization of the Surface of Aluminum as a Result of Chemical Treatment
FT-IR was used to characterize the surfaces of Al after various chemical treatments. All of the oxide surfaces were composed of an anhydrous alumina, aluminum oxyhydroxide (pseudoboehmite) and aluminum hydroxide (close to Gibbsite). The major contaminants in the different oxides are chemisorbed CO2, carbonates and bi-…
Methanol-formic acid esterification equilibrium in sulfuric acid solutions: influence of sodium salts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethanol-formic acid esterification equilibrium in sulfuric acid solutions: influence of sodium saltsBhart Indu, William R. Ernst, and Leslie T. GelbaumCite this: Ind. Eng. Chem. Res. 1993, 32, 5, 981–985Publication Date (Print):May 1, 1993Publication History Published onlin…
The structural phase transition in calcium-aluminum compound (CaAl4): a concerted application of Landau theory and energy band theory
CaAI4 undergoes a reversible, structural transformation at 170 °C according to high-temperature X-ray powder diffraction experiments. The high-temperature phase adopts the tetragonal BaAI4 structure (space group I4jmmm), while the low-temperature phase is monoclinic, C2jm, with lattice parameters, a = 6.1526 (15) A, b…
Measurements of absolute Ar 3sphotoionization cross sections
Cross sections for the photoionization of the argon 3s electron are presented from threshold up to 100 eV. In order to cover this whole energy range with comparable accuracy, we used two complementary methods: absolute measurements by photon-induced fluorescence spectroscopy (PIFS) and relative measurements by time-of…
A green heteropoly blue: isolation of a stable, odd oxidation level in a Dawson molybdate anion, [S2Mo18O62]5-
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA green heteropoly blue: isolation of a stable, odd oxidation level in a Dawson molybdate anion, [S2Mo18O62]5-John B. Cooper, David M. Way, Alan M. Bond, and Anthony G. WeddCite this: Inorg. Chem. 1993, 32, 11, 2416–2420Publication Date (Print):May 1, 1993Publication History…
Time Dependence of the Drape Coefficient of Fabrics
Fabric drape is an important parameter for the aesthetic appearance of fabrics. It can be measured using Cusick's drape meter, where the drape coefficent is obtained with a laborious cut‐and‐weigh method. Presents a method using image analysis for measuring the drape coefficient. With this method, time dependence of t…
Enforcement of matching rules by chemical ordering in the decagonal AlCuCo quasicrystal
An atomic structure model of the decagonal AlCuCo quasicrystal is proposed. The matching rules recently found by R. Klitzing et al. [Int. J. Mod. Phys. B (to be published)] for an abstract triangle tiling are enforced by specific Cu (Co) ordering, reducing the symmetry to P${10}_{5}$/m. The model renders very simple K…
High temperature mass spectrometric studies of the bond energies of gas-phase zinc oxide, nickel oxide, and copper(II) oxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh temperature mass spectrometric studies of the bond energies of gas-phase zinc oxide, nickel oxide, and copper(II) oxideLyn R. Watson, Terry L. Thiem, Rainer A. Dressler, Richard H. Salter, and Edmond MuradCite this: J. Phys. Chem. 1993, 97, 21, 5577–5580Publication Date…