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X-ray Applications with Glass-Capillary Optics
Glass capillaries have unique properties for guiding X-rays in experiments with micrometer precision. Design considerations of such optics are presented for X-ray applications involving macromolecular crystallography, tomography and high-pressure experiments at the Cornell High Energy Synchrotron Source. The authors p…
An Electroanalytical Investigation of Polybithiophene Modified Platinum Electrodes
An electroanalytical investigation of the polybithiophene (PBT) band structure has been performed through the study of the voltammetric response of redox systems like ferrocene ( FeC p 2 ) and p‐benzoquinone (p‐BQ) at Pt/PBT working electrode The FeC p 2 response suggests a semiconducting behavior of the PBT polymer a…
Polyaniline Derivative with External and Internal Doping via Electrochemical Copolymerization of Aniline and 2,5‐Diaminobenzenesulfonic Acid on IrO2 ‐ Coated Titanium Electrode
Copolymerization of 2,5‐diaminobenzensulfonic acid (DABSA) and aniline (AN) was performed electrochemically by cyclic voltammetry on titanium electrodes in 1 M . The copolymerization rate is strongly dependent on the amount of DABSA in the comonomer feed. The compositions of the copolymeric films were determined by x‐…
Synthesis and Surface Acid/Base Properties of Magnesium-Aluminum Mixed Oxides Obtained from Hydrotalcites
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Surface Acid/Base Properties of Magnesium-Aluminum Mixed Oxides Obtained from HydrotalcitesJianyi Shen, J. M. Kobe, Yi Chen, and J. A. DumesicCite this: Langmuir 1994, 10, 10, 3902–3908Publication Date (Print):October 1, 1994Publication History Published online…
Palladium Oxide (PdO) by XPS
X-ray photoelectron spectroscopy (XPS) spectra of palladium oxide (PdO) are presented. Clean, ground PdO powder was pressed into In foil and analyzed with a Surface Science Instruments SSX-101 M-Probe ESCA instrument using monochromatized Al Kα x rays. Spectra include a survey scan, the Pd 3d, 3p, 3s, 4s, 4p regions,…
Copper(II) 12-Metallacrown-4: Synthesis, Structure, Ligand Variability, and Solution Dynamics in the 12-MC-4 Structural Motif
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper(II) 12-Metallacrown-4: Synthesis, Structure, Ligand Variability, and Solution Dynamics in the 12-MC-4 Structural MotifBrian R. Gibney, Dimitris P. Kessissoglou, Jeff W. Kampf, and Vincent L. PecoraroCite this: Inorg. Chem. 1994, 33, 22, 4840–4849Publication Date (Prin…
Artificial uniaxial and biaxial dielectrics with use of two-dimensional subwavelength binary gratings
Two-dimensional symmetric and asymmetric subwavelength binary gratings are investigated. A method for determining the three effective indices of a two-dimensional (2-D) subwavelength grating is presented, as well as a theoretical formalization for the effective index parallel with the normal to the surface. It is show…
Elemental Palladium by XPS
X-ray photoelectron spectroscopy (XPS) spectra of elemental palladium (Pd) are presented. The specimen is a polycrystalline foil and was analyzed after chemical cleaning and ion-sputtering to remove surface contamination. The spectra were collected with a Surface Science Instruments SSX-101 M-Probe ESCA instrument usi…
Preparation and Reactivity of Oxoiron(IV) Porphyrins
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Reactivity of Oxoiron(IV) PorphyrinsJohn T. Groves, Zeev Gross, and Michael K. SternCite this: Inorg. Chem. 1994, 33, 22, 5065–5072Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 October 1994https://pu…
Polarization Effects of Fluorine on the Relative Permittivity in Polyimides
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarization Effects of Fluorine on the Relative Permittivity in PolyimidesG. Hougham, G. Tesoro, A. Viehbeck, and J. D. Chapple-SokolCite this: Macromolecules 1994, 27, 21, 5964–5971Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Publis…
Template-Synthesized Polyaniline Microtubules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemplate-Synthesized Polyaniline MicrotubulesRanjani V. Parthasarathy and Charles R. MartinCite this: Chem. Mater. 1994, 6, 10, 1627–1632Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 October 1994https://pubs.acs.org…
Structure, Chemistry, and Activity of Cu-ZSM-5 Catalysts for the Selective Reduction of NOx in the Presence of Oxygen
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure, Chemistry, and Activity of Cu-ZSM-5 Catalysts for the Selective Reduction of NOx in the Presence of OxygenWolfgang Gruenert, Neil W. Hayes, Richard W. Joyner, Efim S. Shpiro, M. R. H. Siddiqui, and Galina N. BaevaCite this: J. Phys. Chem. 1994, 98, 42, 10832–10846…
A Free Energy Model for Confined Diblock Copolymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Free Energy Model for Confined Diblock CopolymersD. G. Walton, G. J. Kellogg, A. M. Mayes, P. Lambooy, and T. P. RussellCite this: Macromolecules 1994, 27, 21, 6225–6228Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue…
A More General Approach to Distinguishing "Homogeneous" from "Heterogeneous" Catalysis: Discovery of Polyoxoanion- and Bu4N+-Stabilized, Isolable and Redissolvable, High-Reactivity Ir.apprx.190-450 Nanocluster Catalysts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA More General Approach to Distinguishing "Homogeneous" from "Heterogeneous" Catalysis: Discovery of Polyoxoanion- and Bu4N+-Stabilized, Isolable and Redissolvable, High-Reactivity Ir.apprx.190-450 Nanocluster CatalystsYin Lin and Richard G. FinkeCite this: Inorg. Chem. 1994…
Highly Enantioselective, Low-Temperature Epoxidation of Styrene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly Enantioselective, Low-Temperature Epoxidation of StyreneMichael Palucki, Paul J. Pospisil, Wei Zhang, and Eric N. JacobsenCite this: J. Am. Chem. Soc. 1994, 116, 20, 9333–9334Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Publish…
Role of Solvent on the Silanization of Glass with Octadecyltrichlorosilane
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of Solvent on the Silanization of Glass with OctadecyltrichlorosilaneMark E. McGovern, Krishna M. R. Kallury, and Michael ThompsonCite this: Langmuir 1994, 10, 10, 3607–3614Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published i…
Hardness–Grain‐Size Relations in Ceramics
Both Vickers and Knoop hardness ( H ), measured at two or more loads in the range of 100–2000 g (most commonly 100 and 500 g) for a variety of dense oxide and non‐oxide materials, covering a range of grain sizes ( G ), including single crystals where possible, were shown to generally be consistent with (often more lim…
Molecular or Supramolecular Templating: Defining the Role of Surfactant Chemistry in the Formation of Microporous and Mesoporous Molecular Sieves
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular or Supramolecular Templating: Defining the Role of Surfactant Chemistry in the Formation of Microporous and Mesoporous Molecular SievesJ. S. Beck, J. C. Vartuli, G. J. Kennedy, C. T. Kresge, W. J. Roth, and S. E. SchrammCite this: Chem. Mater. 1994, 6, 10, 1816–182…
Stability of carbon nitride solids
An ab initio variable-cell-shape molecular-dynamics algorithm is used to investigate the stability of three carbon nitrides with composition ${\mathrm{C}}_{3}$${\mathrm{N}}_{4}$. The hexagonal \ensuremath{\beta}-${\mathrm{C}}_{3}$${\mathrm{N}}_{4}$ structure, which has been the subject of earlier investigations, is re…