Photoresponse of a liquid junction polyaniline film
Polyaniline films give a photoresponse when dipped into an aqueous solution of electrolyte.
Materials Literature
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Syntheses, molecular structures, and properties of two polar diruthenium(II,III) complexes of 2-hydroxypyridine and 2-anilinopyridine
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, molecular structures, and properties of two polar diruthenium(II,III) complexes of 2-hydroxypyridine and 2-anilinopyridineAkhil R. Chakravarty, F. Albert Cotton, and Derek A. TocherCite this: Inorg. Chem. 1985, 24, 2, 172–177Publication Date (Print):January 1, 198…
Rb-Sr evidence for punctuated illite/smectite diagenesis in the Oligocene Frio Formation, Texas Gulf Coast
Research Article| January 01, 1985 Rb-Sr evidence for punctuated illite/smectite diagenesis in the Oligocene Frio Formation, Texas Gulf Coast JOHN P. MORTON JOHN P. MORTON 1Department of Geological Sciences, University of Texas at Austin, Austin, Texas 78712 Search for other works by this author on: GSW Google Scholar…
Crystal Structure of Bis(2,2':6',2"-terpyridine)iron(II) Bis(perchlorate) Hydrate
The crystal structure of bis (2,2':6',2"-terpyridine)iron(II) bis ( perchlorate ) hydrate has been determined by single-crystal X-ray diffractometry . The compound is monoclinic, space group P21, with two molecules in a unit cell of dimensions a 8.830(3), b 8.914(1), c 20.037(6)?, ß 100.82(1)°. The structure was refin…
Optical textures observed during the shearing of thermotropic liquid-crystal polymers
We report optical observations of a number of main-chain thermotropic liquid-crystal polymers. In situ measurements were carried out at elevated temperatures using an apparatus that is capable of providing a controlled translational oscillatory shearing motion to samples of typically 1–10 µm thickness. In static sampl…
Experimental sulphur-33 nuclear magnetic resonance spectroscopy
The potential of sulphur-33 n.m.r. spectroscopy for chemical applications is explored. Data are presented for a range of compounds. Spectra have been obtained using both high-power and high-resolution systems. Moderately high field strengths were used (7.05 and 4.70 T), together with a special pulse sequence to reduce…
Pseudo-lamellar ordering in uniaxial and biaxial lyotropic nematics : a synchrotron X-ray diffraction experiment
Synchrotron X-ray measurements are performed in both uniaxial (discotic and calamitic) and biaxial nematic lyomesophases of the mixture K-laurate, 1-decanol and D2O. A first-order band and a second-order band with spacing ratio 1 : 2 characteristic of a pseudo-lamellar structure are observed in the three nematic phase…
Gold as a ubiquitous substrate for intense surface-enhanced Raman scattering
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGold as a ubiquitous substrate for intense surface-enhanced Raman scatteringPing Gao, Mary L. Patterson, M. A. Tadayyoni, and Michael J. WeaverCite this: Langmuir 1985, 1, 1, 173–176Publication Date (Print):January 1, 1985Publication History Published online1 May 2002Publish…
Ion-beam-assisted etching of diamond
The high thermal conductivity, low rf loss, and inertness of diamond make it useful in traveling wave tubes operating in excess of 500 GHz. Such use requires the controlled etching of type IIA diamond to produce grating like structures tens of micrometers deep. Previous work on reactive ion etching with O2 gave etchin…
Asymmetric epoxidation of alkenes catalysed by a ‘basket-handle’ iron–porphyrin bearing amino acids
A ‘basket-handle’ iron-porphyrin bearing L-phenylalanine residues has been prepared and found to catalyse the epoxidation of p-chlorostyrene with a 50% excess of the (R)-epoxide, whereas ‘picket’ iron-porphyrins bearing the same amino acid have led to a 10–20% excess of the (S)-epoxide.
Preparation and Characterization of a Dialkoxyiron(IV) Porphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of a Dialkoxyiron(IV) PorphyrinJohn T. Groves, Robert Quinn, Thomas J. McMurry, Mikio Nakamura, George Lang, and Brian BosoCite this: J. Am. Chem. Soc. 1985, 107, 2, 354–360Publication Date (Print):January 1, 1985Publication History Published…
Laboratory Corrosion Tests and Standards
Description Contains 32 papers on accelerated corrosion test, including immersion, simulated atmosphere, electrochemical, and environmentally aggressive tests. Includes an appendix of 14 ASTM standard corrosion tests, practices, and definitions.
SINGLET OXYGEN GENERATION BY HEMATOPORPHYRIN IX, UROPORPHYRIN I and HEMATOPORPHYRIN DERIVATIVE AT 546 nm IN PHOSPHATE BUFFER and IN THE PRESENCE OF EGG PHOSPHATIDYLCHOLINE LIPOSOMES
Abstract— The quantum yield of singlet oxygen generation (φ) was measured at 546 nm with the p ‐nitrosodimethylaniline (RNO) method. The results obtained in pH 7.4 phosphate buffer (PB) were: φ(HP) = 0.44 ± 0.05: φ= 0.71 ± 0.07: φ(HpD‐A) = 0.06 ± 0.02. The value of φ was constant from 3 to 67 μM , attributed to the do…
Theoretical analysis and fabrication of antireflection coatings on laser-diode facets
Reflectivity of an antireflection-(AR) coated laser-diode (LD) facet is analyzed on the basis of a slab waveguide model and an angular spectrum approach. The reflectivities of single- and double-layer AR coatings on 1.55-μm GaInAsP/InP LD's are numerically calculated. Optimum film parameters, such as thickness and ref…
Stabilization of the monovalent nickel complex with 1,4,8,11-tetraazacyclotetradecane in aqueous solutions by N- and C-methylation. An electrochemical and pulse radiolysis study
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of the monovalent nickel complex with 1,4,8,11-tetraazacyclotetradecane in aqueous solutions by N- and C-methylation. An electrochemical and pulse radiolysis studyNusrallah Jubran, Gregory Ginzburg, Haim Cohen, Yaacov Koresh, and Dan MeyersteinCite this: Inorg.…
Photochemical Generation of Superoxide Radical and the Cytotoxicity of Phthalocyanines
The effect of the central metal atom on the photodynamic activity of phthalocyanine dyes has been estimated by cytotoxicity to cultured Chinese hamster cells. Chloroaluminium phthalocyanine,, followed by the Zn- derivate, were found to be the only active dyes. In parallel it was found that visible light (615 +/- 10 nm…
Field-induced transient periodic structures in nematic liquid crystals : the splay Frederiks transition
A beautiful striped texture is often observed as the initial response of a uniformly aligned nematic liquid crystal to a suddenly applied reorienting field The structure of the instability depends on the elastic and viscous anisotropy of the liquid crystal, the field strength, and in an important way on the boundary c…
Molecular structure and solid-state properties of the two-dimensional conducting mixed-valence complex [NBu4]0.29[Ni(dmit)2] and the neutral [Ni(dmit)2](H2dmit = 4,5-dimercapto-1,3-dithiole-2-thione); members of an electron-transfer series
Single crystals of the mixed-valence radical salt [NBu4]2[Ni(dmit)2]7·2CH3CN {ignoring the solvent molecules, the formula may be written as [NBu4]0.29[Ni(dmit)2]; H2dmit = 4,5-dimercapto-1,3-dithiole-2-thione} were obtained by galvanostatid oxidation of [NBu4][Ni(dmit)2] in acetonitrile. The crystal structure of this…
Calculation of the second-order electronic polarizabilities of some organic molecules. Part 1
A version of the CNDO/S method has been re-parametrized by correlating computed and measured dipole moments and transition wavelengths for a range of organic conjugated molecules. The method has then been used to calculate the hyperpolarizability tensor, βijk, in the form related to second-harmonic generation, for an…
Roles of Organic Matter in Sediment Diagenesis
Abstract This volume is the direct result of an SEPM Research Conference held in October 1983 at Lost Valley Ranch, Colorado. The goal of the volume is to bring attention of the sedimentological community the importance of interaction of organic compounds with the inorganic sedimentary system and the degree to which o…