A rechargeable battery using electrochemically doped poly(N-vinylcarbazole)
Electrochemically doped poly(N-vinylcarbazole) functions as a positive electrode material for a secondary lithium battery.
Materials Literature
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Helielectric-ferroelectric transition mediated by a tilt-suppressing intermediate phase in liquid crystals
In the newly synthesized compound MORA12 [S-4-0-(6 methyl)octylresorcylidene-4'-dodecylaniline], we observed a novel intermediate phase (which we call ${P}^{\mathrm{*}}$) between two tilted smectic liquid-crystal phases, ${C}^{\mathrm{*}}$ and X. The ${C}^{\mathrm{*}}$ phase has a helicoidal structure whereas the X ph…
Quasi-elastic neutron-scattering studies of intercalated molecules in charge-deficient layer silicates. Part 2.—High-resolution measurements of the diffusion of water in montmorillonite and vermiculite
The relative influence of water–surface and water–cation interactions in hydrates of the charge-deficient expanding-lattice layer silicates montmorillonite and vermiculite have been studied using high-resolution quasi-elastic neutron-scattering (QENS) measurements made with the back-scattering spectrometer at ILL, Gre…
New electromechanical effect in chiral smectic C* liquid crystals
A new electromechanical effect has been found in planar oriented S* C liquid crystals under the influence of an applied alternating electric field. Apart from the well-known electrooptical effects a mechanical vibration has been observed in a direction parallel to the smectic layers and perpendicular to the electric f…
Structure Determination by X-Ray Crystallography
X-ray crystaIlography provides us with the most accurate picture we can get of atomic and molecular structures in crystals. It provides a hard bedrock of structural results in chemistry and in mineral
Die Schmelzkristallisation von organischen Stoffen und ihre großtechnische Anwendung
Abstract Melt crystallization of organic substances and its large scale application . In the separation and purification of organic substances, water‐ and solvent free melt crystallization is gaining importance as an independent thermal unit operation. This contribution reviews the physico‐chemical fundamentals, the v…
Photoelectron spectroscopic studies of electrode and related surfaces
P. M. A. Sherwood, Chem. Soc. Rev., 1985, 14, 1 DOI: 10.1039/CS9851400001
An investigation of the involvement of cytoskeletal structures and secretion in gliding motility of the marine diatom, Amphora coffeaeformis
Abstract Gliding motility was investigated in the marine diatom, Amphora coffeaeformis. Ultrastructural, biochemical, and pharmacological protocols were employed to probe the possible involvement of cytoskeletal proteins and a secretory process in gliding motility. Motility rate was measured using a video recording ap…
New mesophases formed by water soluble discoidal amphiphiles
We present the first examples of lyotropic discotic nematic and columnar (hexagonal) mesophases obtained by dissolution of non-ionic, disk-like amphiphilic mesogens (hexa-polyethyleneoxy derivatives of triphenylene) in water. The phenomenon of « solvent driven aggregation » is shown to be a practicable route to new an…
Mechanical properties of blends of nylon 6 with a chemically modified polyolefin
Abstract Both tensile and impact properties were measured of a heterogeneous polymer blend system, consisting of nylon 6 and a chemically modified polyolefin, DuPont CXA3095, which is an ethylene‐based multifunctional polymer. It was found, from the tensile testing, that the blends exhibited no signs of necking, and t…
Oxygen vacancy ordering in superlatives of the two novel oxides, La2Ni2O5 and La2Co2O5, prepared by low temperature reduction of the parent perovskites
Controlled reduction of LaBO3(B = Co or Ni) perovskites gives rise to ordered structures of composition La2B2O5, belonging to the homologous series LanBnO3n–1, which retain the original features of the perovskite; the co-ordination of the transition metal ions differ, with Ni2+ ions showing octahedral and square-plana…
The blue phase of liquid crystals
1985 . 146, . 3 *) (. 4 ), .
A method for the quantitative determination of the basic, acidic, and total surface hydroxy content of TiO2
The number and type of hydroxy groups on a TiO2 surface can be determined using a combination of wet chemical techniques, F– exchange, OH– and Fe(acac)3(Hacac = pentane-2,4-dione) adsorption, and i.r. spectroscopy.
Magnetic behaviour of tetrakis[(2-diethylaminoethanolato)isocyanatocopper(II)], a complex with an antiferromagnetic ground state; the crystal and molecular structure of the triclinic modification
The crystal and molecular structure and magnetic behaviour of [{Cu(NCO)(OCH2CH2NEt2)}4](B) from benzene have been determined. The crystal structure determination was carried out by single-crystal X-ray diffraction methods and refined to R= 0.066 for 4 379 independent reflections: triclinic, space group P, with unit-ce…
Experimental evidence for a hexagonal Blue Phase
Experimental evidence for a Blue Phase of hexagonal symmetry is reported. In agreement with a theoretical prediction by Hornreich et al., this new Blue Phase has been found in a short pitch cholesteric liquid crystal of positive dielectric anisotropy submitted to a large enough electric field. Its symmetry, compatible…
In-Vivo Degradation of Poly(Lactic Acid) of Different Molecular Weights
Lactic acid was polymerized using tetraphenyl tin as a catalyst. The molecular weight of the resultant poly(lactic acid) varied between 0.89 X 10(6) and 2.94 X 10(6) depending upon the concentration of the catalyst used. In-vivo degradation of the poly(lactic acid) samples having 4 different molecular weights were stu…
SURFACE TENSION EFFECTS IN THE SEDIMENTATION OF POLYMER PARTICLES IN VARIOUS LIQUID MIXTURES
The sedimentation volume, V sed of polymer particles in mixtures of pairs of nonpoiar as well as polar liquid combinations was determined at 20°C The liquid combinations were chosen such that the interfacial tension, γSV, of the polymer particles fell between the surface tensions of the two liquids. Constant: amounts…
Reaction‐Rate‐Limiting Steps in Carbothermal Reduction Processes
The production of β‐sialon (Si3A1303N5) and nonoxidic powders by carbothermal reduction of oxides is discussed. Special attention is paid to the rate‐determining steps in the conversion process performed in a packed‐bed reactor. It is shown that powders with specific surface area >10 m 2 /g can be produced by the c…
Grain Boundary Fracture in Molybdenum Bicrystals with Various ⟨110⟩ Symmetric Tilt Boundaries
In order to investigate the grain boundary fracture in molybdenum with 〈110〉 symmetric tilt boundaries, the four-point bending test was conducted at 77 K by using bicrystals with various misorientations from 0° to 90°. A stress-strain curve to fracture was measured as a function of misorientation angle φ. Two classes…
X-Ray Studies on the Mesogen 4′-n-Pentyloxy-4-Biphenylcarbonitrile(5OCB) in the Solid Crystalline State
The crystal and molecular structure of nematogen 4′-n-Pentyloxy-4-Biphenylcarbonitrile has been determined by direct methods. The crystals belong to the monoclinic system with space group P21/n. a = 21.378(5), b = 5.695(3), c = 12.789(2) Å, β = 106.074(17)° with four molecules per unit cell. Least-squares refinement l…