Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Reevaluation of Bicontinuous Cubic Phases in Starblock CopolymersDamian A. Hajduk, Paul E. Harper, Sol M. Gruner, Christian C. Honeker, Edwin L. Thomas, and Lewis J. FettersCite this: Macromolecules 1995, 28, 7, 2570–2573Publication Date (Print):March 1, 1995Publication Hi…
Abstract The first steps of H 2 S adsorption have been studied on polycrystalline copper samples, which are more relevant to industrial copper samples than to single‐crystal surfaces. The tools for characterization are ultrahigh vacuum spectroscopic methods, such as x‐ray photoelectron and ion scattering spectroscopie…
Structural aspects of PAN-CSA, POT-CSA and PAN-MSA prepared with m-cresol are compared. In relationship with the electronic properties measured on the same materials we emphasize that the geometry of the polymer chain packing, the disorder and the interchain separation have a key influence on the charge conduction pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Solvent on the Radiative Decay of Singlet Molecular Oxygen (a1.DELTA.g)Rodger D. Scurlock, Santiago Nonell, Silvia E. Braslavsky, and Peter R. OgilbyCite this: J. Phys. Chem. 1995, 99, 11, 3521–3526Publication Date (Print):March 1, 1995Publication History Published…
Block copolymers of lactide and poly(ethy1ene glycol) with various mclar ratios were synthesized.Tin(I1) bis(2-ethylhexanoate) has been used as a catalyst.Kinetic measurement and mechanistic studies suggest that the reactivity of the initiator, a hydroxyl group bearing reagent, is an important parameter on the polymer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR Spin-Trapping Study of the Sonolysis of H2O/D2O Mixtures: Probing the Temperatures of Cavitation RegionsVladimir Misik, Norio Miyoshi, and Peter RieszCite this: J. Phys. Chem. 1995, 99, 11, 3605–3611Publication Date (Print):March 1, 1995Publication History Published onli…
The study of well‐defined, monodisperse model PPP oligomers (e.g. see Figure) has revealed that, contrary to expectations, the planarization of the π system in these oligomers leads to a decrease in the effective conjugation length. This result has profound influence on the design of conducting organic materials. magn…
X-ray investigations of Na05Bi0.5TiO3 crystals showed the coexistence of rhombohedral and tetragonal phases in the wide temperature range. The temperature dependence of phase concentrations can explain the anomaly of dielectric properties observed at 280°C and 320°C temperatures.
Using high-resolution transmission electron microscopy, we have studied the atomistic structure of 90° domain walls in ferroelectric PbTiO3 thin films. Variations in the c and a lattice parameters across domain boundaries were determined by measuring the distance between specific image features associated with Pb colu…
A many-body interatomic potential has been developed for the h.c.p. metal α-zirconium using the same methodology as that used by Ackland for α-titanium. The repulsive pair part of the potential has been constructed so that the model can be employed for simulating atomic collisions. The favoured self-interstitial confi…
A modular system of techniques and software has been developed for the calibration and correction of intensity linearity, uniformity of response, spatial distortion, and image plate decay. With calibration the Molecular DynamicsTM Imaging Plate scanner system has been shown to give comparable results to the MarResearc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Simple Method for Preparing Magnesium PorphyrinsJonathan S. Lindsey and Jeffrey N. WoodfordCite this: Inorg. Chem. 1995, 34, 5, 1063–1069Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://pubs.acs.org/d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Reactivity of Unusual Phosphorus Dendrimers. A Useful Divergent Growth Approach Up to the Seventh GenerationNathalie Launay, Anne-Marie Caminade, and Jean-Pierre MajoralCite this: J. Am. Chem. Soc. 1995, 117, 11, 3282–3283Publication Date (Print):March 1, 1995P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular Interactions in the Ground and Excited States of Tetrakis(N-methylpyridyl)porphyrinsFrank J. Vergeldt, Rob B. M. Koehorst, Arie van Hoek, and Tjeerd J. SchaafsmaCite this: J. Phys. Chem. 1995, 99, 13, 4397–4405Publication Date (Print):March 1, 1995Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPronounced Solvent and Concentration Effects in an Enantioselective Mukaiyama Aldol Condensation Using BINOL-Titanium(IV) CatalystsGary E. Keck and Dhileepkumar KrishnamurthyCite this: J. Am. Chem. Soc. 1995, 117, 8, 2363–2364Publication Date (Print):March 1, 1995Publication…
Synthesis of bulk titanium silicon carbide (Ti 3 SiC 2 ) from the elemental Ti, Si, and C powders has been accomplished for the first time, using the arc‐melting and annealing route. The effects of various parameters on the phase purity of the Ti 3 SiC 2 have been examined, including the starting composition of the po…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAtomic structure of the buried catalytic pocket of Escherichia coli chorismate mutaseAngela Y. Lee, P. Angrew Karplus, Bruce Ganem, and Jon ClardyCite this: J. Am. Chem. Soc. 1995, 117, 12, 3627–3628Publication Date (Print):March 1, 1995Publication History Published online1…
All articles of this category The search for conducting organic solids and other new materials has paved the way for many discoveries in the chemistry of the chalcogen-based heterocyclic compounds. This focused interest has especially influenced the investigations into 1,3-dithiole-2-thione-4,5-dithiolate (DMIT) and i…
A large optical-aperture membrane diamond anvil cell designed for infrared spectroscopy is described. The cell offers definite advantages compared to existing systems. Other possibilities concerning x-ray diffraction analyses with the cells are mentioned.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA High-Valent Nonheme Iron Intermediate. Structure and Properties of [Fe2(.mu.-O)2(5-Me-TPA)2](ClO4)3Yanhong Dong, Hiroshi Fujii, Michael P. Hendrich, Randolph A. Leising, Gaofeng Pan, Clayton R. Randall, Elizabeth C. Wilkinson, Yan Zang, Lawrence Que Jr., and Cite this: J.…