Preparation and properties of a tetracyanoquinodimethane fused with 1,2,5-thiadiazole units
Bis[1,2,5]thiadiazolo-tetracyanoquinodimethane (1) was prepared and found to form a highly conductive complex with tetrathianaphthacene.
Materials Literature
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Aseptic processing and packaging of food
A prerequisite for the aseptic packaging of food is the UHT or HTST process used for sterilizing the food. These processes are defined. The history, microbiology, and engineering principles of aseptic processing and packaging are covered. Attainment of sterility and acceptable levels of spoilage are discussed. Methods…
A new method for the determination of the stability constant of metalloporphyrins: use of the catalytic effect of mercury(II) on metalloprophyrin formation
The catalytic effect of the mercury(II) ion on metalloporphyrin formation provides the basis for determination of the stability constant of the zinc (II) porphyrin, the rate of formation of which is extremely slow in the absence of mercury(II).
A simple hydrocarbon electrolyte: completing the electron-transfer series [Fe 4 S 4 (SPh) 4 ] 1–/2–/3–/4–
Electrochemical properties of {[NBun4][BF4]·3 toluene} are described; the hydrocarbon medium allows, for the first time, the observation of all members of the [Fe4S4(SPh)4]n– electron-transfer Series, n= 1–4.
An in situ Mössbauer investigation of the influence of metal–support and metal–metal interactions on the activity and selectivity of iron–ruthenium catalysts
The hydrogen reduction of a series of alumina- and silica-supported iron–ruthenium catalysts has been studied in situ by iron-57 Mössbauer spectroscopy. The data, complemented by results from temperature-programmed reduction experiments, show that ruthenium enhances the reducibility of iron and that the metal–support…
Electrochemical Impedance Tests for Protective Coatings
The experimental approach for carrying out electrochemical impedance measurements for coated metals is described. Models for the impedance behavior have been developed for different coating systems, and methods for the analysis of experimental impedance diagrams in terms of coating and interface properties and their c…
The Structure of Cellulose by Conformational Analysis. 2. The Cellulose Polymer Chain
Conformational analysis studies on the tertiary structure of cello-tetraose, methyl-β-cellotetraoside, and single cellulose chains were carried out by using calculation of van der Waal, H-bond, electrostatic, and torsional energy interactions between the atoms and molecular groups in both the skeleton and side chains…
Organic Matter and Silicon in Relation to the Crystallinity of Soil Iron Oxides
The contents of pyrophosphate-extractable carbon and iron, EDTA-extractable iron, dithionite-EDTA-extractable iron and silicon, total carbon, and sodium hydroxide-extractable silicon were determined in thirty soil samples from Denmark and Tanzania in order to investigate the general influence of organic matter and sil…
Kinetics of displacement and charge transfer reactions probed by SERS: evidence for distinct donor and acceptor sites on colloidal gold surfaces
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of displacement and charge transfer reactions probed by SERS: evidence for distinct donor and acceptor sites on colloidal gold surfacesClaude J. Sandroff and D. R. HerschbachCite this: Langmuir 1985, 1, 1, 131–135Publication Date (Print):January 1, 1985Publication H…
Disc-like Mesogens: Synthesis and Characterization of a Series of Rufigallol-hexa-n-alkanoates
Aliphatic esters of rufigallol with formula have been prepared and their phase transitions studied by differential scanning calorimetry, x-ray diffraction, and optical methods. Compounds with 6 < m < 13 give enantiotropic columnar mesophases; those with 7 < m < 9 give also a monotropic mesophase. Both melting temperat…
Lewis-base adducts of Group 1B metal(I) compounds. Part 17. Synthesis and crystal structures of adducts of copper(I) cyanide with nitrogen bases
Compounds of the type [Cu(CN)Ln][L = diethylamine, (1), triethylamine, (2), 4-methylpyridine, (3), or 1,10-phenanthroline, (4)] have been synthesized by recrystallization of copper(I) cyanide from (or with) the parent base and their crystal structures have been determined by single-crystal X-ray diffraction methods; n…
A novel ‘anchored’ palladium( II ) phosphinated montmorillonite: the first example in the interlamellars of smectite clay
Montmorillonite containing PdCl2 anchored via pendant phosphinated groups in the interiamellar region has been synthesized, characterized, and found to hydrogenate terminal alkenes and alkynes selectively.
Misorientation Dependence of Grain Boundary Fracture in Molybdenum Bicrystals with Various ⟨110⟩ Twist Boundaries
Grain boundary fracture in molybdenum was investigated by the four-point bending test at 77 K as a function of misorientation angle, by using bicrystals with various 〈110〉 twist boundaries. Main results obtained are as follows:(1) Fracture always occurs at the grain boundary. (2) The fracture strength and strain to fr…
Darstellung und Kristallstruktur von CsTe4
Abstract CsTe 4 entsteht aus Gemengen von Caesium und Tellur im Molverhältnis 1:4, wenn man diese in abgeschlossenen Ampullen einer Schmelzreaktion bei 570°C unterwirft. Die Elementgemenge stellt man der, indem man CsN 3 und Te (1:4) zusammengibt und anschließend durch kontrollierte Zersetzung des Azids den Stickstoff…
Studies of the effect of calcination on the dispersion and reduction of nickel supported on alumina by X-ray photoelectron spectroscopy, X-ray diffraction, chemisorption and catalytic activity
The influence of calcination temperature on alumina and on alumina-supported nickel has been systematically studied. Identification of the nickel species has been made using the techniques of X-ray photoelectron spectroscopy (X.p.s.) and X-ray diffraction (X.r.d.). Hydrogen and oxygen adsorption measurements were used…
Luminescence of porphyrins and metalloporphyrins. Part 10.—Mixed-metal dimers
Attaching a second metalloporphyrin to a zinc(II) porphyrin via a short flexible chain results in quenching of both excited singlet and triplet states of the ZnII porphyrin. The extent of quenching depends markedly upon the nature of the central metal ion contained within the second porphyrin ring (MnIII≈ FeIII > CuII…
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.
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…