Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonionic Superbase-Promoted Synthesis of Oxazoles and Pyrroles: Facile Synthesis of Porphyrins and .alpha.-C-Acyl Amino Acid EstersJiansheng Tang and John G. VerkadeCite this: J. Org. Chem. 1994, 59, 25, 7793–7802Publication Date (Print):December 1, 1994Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxometalate-Diphosphate Complexes. 2. Structure of 18-Molybdopyrophosphate, [(P2O7)Mo18O54]4-, Which Encloses a Linear, Eclipsed Conformation of the Pyrophosphate Anion, and Preliminary Characterization of its One- and Two-Electron Heteropoly BluesUli Kortz and Michael T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Nanoscopic Architectures. Linear-Globular ABA Copolymers with Polyether Dendrimers as A Blocks and Polystyrene as B BlockIvan Gitsov and Jean M. J. FrechetCite this: Macromolecules 1994, 27, 25, 7309–7315Publication Date (Print):December 1, 1994Publication History Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, Crystal Structures, and Properties of New Layered Molybdenum(VI) Selenites: (NH4)2(MoO3)3SeO3 and Cs2(MoO3)3SeO3William T. A. Harrison, Laurie L. Dussack, and Allan J. JacobsonCite this: Inorg. Chem. 1994, 33, 26, 6043–6049Publication Date (Print):December 1, 1994…
Abstract The acid hydrolysis products of trioctahedral fluorohectorite and phlogopite have been investigated by XRD, MAS NMR spectroscopy and nitrogen BET surface area analysis in an effort to assess the relative importance of edge attack and gallery access mechanisms. A dramatic loss of X-ray crystallinity and the fo…
Abstract Substituted N,N‐Chelate Ligands ‐ Applications in Molybdenum‐Catalyzed Epoxidation of Olefins * Oxodiperoxomolybdenum complexes 4 of substituted 2‐[3(5)‐pyrazolyl]pyridines ( 2a‐g ) were synthesized in order to control the solubility of these complexes in organic solvents. Alkyl side chains (butyl, octyl, oct…
High-spatial-frequency gratings can be used as an alternative to thin-film antireflection coatings to reduce the reflectivity at the boundary between two different media. In the case of one-dimensional gratings, the conditions on the grating structure can be approximately determined by the effective medium theory (EMT…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of vapor deposition parameters on SERS active Ag film morphology and optical propertiesDavid J. Semin and Kathy L. RowlenCite this: Anal. Chem. 1994, 66, 23, 4324–4331Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and Magnetic Effects of Successive Protonations of Oxo Bridges in High-Valent Manganese DimersMichael J. Baldwin, Timothy L. Stemmler, Pamela J. Riggs-Gelasco, Martin L. Kirk, James E. Penner-Hahn, and Vincent L. PecoraroCite this: J. Am. Chem. Soc. 1994, 116, 25,…
Abstract This paper describes a new method for the preparation of silver colloids with a narrow range of particle size to be used in surface‐enhanced Raman spectroscopy. Using malachite green as a strongly adsorbing dye, it can be shown that colloids from different preparation batches exhibit the same enhancement fact…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Solid-to-Solid Asymmetric Dihydroxylation Procedure for Kilogram-Scale Preparation of Enantiopure HydrobenzoinZhi-Min Wang and K. Barry SharplessCite this: J. Org. Chem. 1994, 59, 26, 8302–8303Publication Date (Print):December 1, 1994Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxometalate Derivatives with Multiple Organic Groups. 1. Synthesis and Structures of Tris(organotin) .beta.-Keggin and .alpha.-Dawson TungstophosphatesFeibo Xin and Michael T. PopeCite this: Organometallics 1994, 13, 12, 4881–4886Publication Date (Print):December 1, 1994…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Assemblies Containing Linear and Bent [FeIII-CN-CuII] Bridge Units: Synthesis, Structures, and Relevance to Cyanide-Inhibited Heme-Copper OxidasesMichael J. Scott and R. H. HolmCite this: J. Am. Chem. Soc. 1994, 116, 25, 11357–11367Publication Date (Print):December…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid State Effects on Spin Transitions: Magnetic, Calorimetric, and Moessbauer-Effect Properties of [FexCo1-x(4,4'-bis-1,2,4-triazole)2(NCS)2].cntdot.H2O Mixed-Crystal CompoundsJean-Pierre Martin, Jacqueline Zarembowitch, Azzedine Bousseksou, Ary Dworkin, Jaap G. Haasnoot,…
Alumina-loaded new molding compounds feature a thermal conductivity up to 1.5 W/mK, a water uptake smaller than 0.2 weight %, a coefficient of thermal expansion of 10 ppm/K, and an excellent popcorn resistance (0 cracks from 6). The thermal conductivity of such particulate-loaded polymers has been investigated as a fu…
Abstract The breakup of droplets in an inhomogeneous flow is the key to emulsification. Frequently, the local flow experienced by the drops is a (quasi‐) simple shear flow. The breakup of droplets in a steady, simple shear flow in the absence of emulsifiers has been studied extensively. In the presence of emulsifiers,…
The use of front-surface specular reflection FT-IR spectroscopy to characterize surface orientation in thick samples of poly(ethylene terephthalate) (PET) has been investigated. It has been shown that, even for samples whose surface uniformity is less than perfect, absorption index spectra of excellent quality are obt…
BACKGROUND: Superparamagnetic iron oxide particles represent a new class of contrast agents that increase the detectability of hepatic and splenic tumors by magnetic resonance imaging (MRI). Magnetite dextran nanoparticles, a preparation with a small mean particle diameter in solution and null zêta potential present h…
Abstract The corrosion inhibition of mild steel in 1N sulphuric acid containing various concentrations of indole was studied in the temperature range of 25–70°C through the use of potentiodynamic polarization curves. The indole was found to shift the corrosion potentials to positive values and to decrease the dissolut…
Porous cathodes of NiO ( Li ) , Co‐doped LiFeO 2 , and LiCoO 2 for the molten carbonate fuel cell (MCFC) were examined in a comparative study using electrochemical impedance spectroscopy at temperatures of 923, 973, and 1023 K. Using this technique the contributions of charge transfer and diffusion to the impedance co…