Integrated Intensities of Absorption Bands in Infrared Spectroscopy
(1967). Integrated Intensities of Absorption Bands in Infrared Spectroscopy. Applied Spectroscopy Reviews: Vol. 1, No. 1, pp. 29-98.
Materials Literature
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Crystal structure of syndiotactic polypropylene
Abstract Double oriented fiber spectra of syndiotactic polypropylene were obtained. It was possible to redetermine with greater accuracy the unit cell constants, which are: a = 14.50, b = 5.60, c = 7.40 A. Space group: C222 1 . It was proved that the chain has s (2/1)2 symmetry, corresponding to a succession of intern…
The theory of paramagnetic relaxation
The spin-lattice relaxation of paramagnetic ions in ionic crystals takes place via thermal modulations of the complex consisting of the ion and its immediate neighbours. The standard theory is that due to Van Vleck, who used a crystal-field model to describe the complex. In recent years there have been extensive devel…
Study of the Structure of Vanadium in Soda—Boric Oxide Glasses
The EPR and optical spectra of vanadium in the Na2O–B2O3 glass system have been analyzed. It is found that the data can best be interpreted in terms of a vanadyl-type structure in a ligand field of fourfold symmetry. Good correlation of the optical and EPR data is achieved through molecular orbital calculations, which…
The Classification of Non-Euclidean Plane Crystallographic Groups
This paper deals with the algebraic classification of non-euclidean plane crystallographic groups (NEC groups, for short) with compact quotient space. The groups considered are the discrete groups of motions of the Lobatschewsky or hyperbolic plane, including those which contain orientation-reversing reflections and g…
Mixed Conduction in Zr[sub 0.85] Ca[sub 0.15] O[sub 1.85] and Th[sub 0.85]Y[sub 0.15]O[sub 1.925] Solid Electrolytes
The d‐c polarization technique according to Wagner was applied for the first time at elevated temperatures for the determination of σ ⊖ and σ ⊕ in the Zr 0.85 Ca 0.15 O 1.85 and Th 0.85 Y 0.15 O 1.925 electrolytes over a range of oxygen activity and temperature. The applicability of the technique and an improved metho…
The Structure and Properties of Materials
Abstract not Available.
Molecular hyperpolarisabilities
The first page of this article is displayed as the abstract.
Measurement of Diffusion Lengths in Direct-Gap Semiconductors by Electron-Beam Excitation
In semiconductors having high efficiency for radiative recombination, the voltage dependence of cathodoluminescence may be used to determine the diffusion length and to estimate the surface recombination velocity of excess carriers. Theoretical calculations are based on a knowledge of the Laplace transform of the dist…
Elastic moduli of the crystal lattices of polymers
Abstract Elastic moduli of the crystalline regions in high polymers have been studied. Oriented specimens were used throughout. Lattice strains were measured by an x‐ray technique in the direction of the fiber axis as well as in that perpendicular to the fiber axis. The moduli for both directions were calculated on th…
Reactions of Glasses with Aqueous Solutions
The kinetics of the reactions of various glasses with water and aqueous solutions with pH from 1 to 13 was studied. Simple binary alkali oxide‐silica glasses were examined as well as some ternary glasses derived from the binary compositions by substituting alkaline‐earth oxides for silica. All components of the glass…
5T2-1A1 Equilibriums in some iron(II)-bis(1,10-phenanthroline) complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT5T2-1A1 Equilibriums in some iron(II)-bis(1,10-phenanthroline) complexesEdgar Koenig and K. MadejaCite this: Inorg. Chem. 1967, 6, 1, 48–55Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 January 1967https://pubs.acs.o…
Mechanical properties and fine structure of drawn polymers
Abstract Complex moduli of oriented specimens of polyethylene (PE), polypropylene (PP), polyoxymethylene, polyethylene oxide), and polytetrahydrofuran were measured in sheet form as a function of direction. The dynamic tensile modulus (E′) along the stretched direction (0° direction) was found to be lower than that pe…
Benzotriazole and Related Compounds as Corrosion Inhibitors For Copper
Examination of benzotriazole-treated surfaces on copper, and the complexes produced when benzotriazole and analogous compounds react with cuprous and cupric ions in aqueous solution, has shown that the film produced on copper has a polymeric structure and is chemically bonded to the metal or metal-oxide surface Thickn…
Theory of Resonant Secondary Radiation due to Impurity Centres in Crystals
Abstract The resonant secondary radiation spectrum of impurity centres in crystals is studied on the basis of a second‐order approximation for the interaction between the electromagnetic field and the material. It is shown that for the case of excitation in the phonon wing of the absorption band, the main part of the…
Selbstdiffusion und Kernspin‐Gitter‐Relaxation von nahezu kugelförmigen Molekülen in der flüssigen Phase
Abstract Der Selbstdiffusionskoeffizient D und die longitudinale Kernspinrelaxationszeit T 1 der Protonen wurden in der flüssigen Phase zwischen Schmelzpunkt und Siedepunkt von Molekülen des Typs (CH 3 ) 4 X, mit X = C, Si, Ge, Sn, Pb, (CH 3 ) 3 CX mit X = Cl, Br, J, OH, NO 2 , (CH 3 ) 3 SiX mit X = Cl, Br, Fund (CH 3…
Conductivité Electronique et Propriétés Chimiques de Polyanilines Oligomères
Abstract Les produits obtenus à partir d'une méthode simple de préparation des éméraldines out été étudiés en ce qui concerne leurs propriétés d'acidité, d'oxydo‐réduction et de formation de complexes: ( 1 ) l'analyse des courbes de neutralisation de suspensions aqueuses d'éméraldines par des bases fortes a permis d'é…
On the Structure and Properties of Polyamides. XXVII. The Mechanism of Water Sorption in Polyamides
Abstract The sorption and the desorption isotherms of water are described for several crystalline polyamides (nylons 2, 3, 6, 7, 8, 11), amorphous polyamides (poly‐ C ‐methylcaprolactam, terpolymer of caprolactam, aminoheptanoic acid and aminoundecanoic acid) and model amides ( N ‐ethyl acetamide, Y ‐ethyl butyramide,…
On the Eu3+ Fluorescence of Mixed Metal Oxides
Abstract not Available.
High Temperature Oxidation of Metals
Abstract not Available.