Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly Enantioselective Epoxidation of 1,1-Disubstituted Alkenes Catalyzed by ChloroperoxidaseAnnette F. Dexter, Frederick J. Lakner, Robert A. Campbell, and Lowell P. HagerCite this: J. Am. Chem. Soc. 1995, 117, 23, 6412–6413Publication Date (Print):June 1, 1995Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTShear Orientation and Rheology of a Lamellar Polystyrene-Polyisoprene Block CopolymerS. S. Patel, R. G. Larson, K. I. Winey, and H. WatanabeCite this: Macromolecules 1995, 28, 12, 4313–4318Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Pub…
Abstract Glycidol (2‐epoxy‐1‐propanol) was polymerized under the action of Lewis acids (BF 3 OEt 2, , SnCl 4 ) and protonic acids (CF 3 COOH, CF 3 SO 3 H). Polymers with number‐average molecular weights ( M̄ n ) varying from 2500 to 6000 g/mol were obtained. The structure of obtained polymers was characterized by 13 C…
Abstract Material surfaces that can mediate cellular interactions by the coupling of specific cell membrane receptors may allow for the design of a biomaterial that can control cell attachment, differentiation, and tissue organization. Cell adhesion proteins have been shown to contain minimum oligopeptide sequences th…
In agreement with the experimental results of the groups of Rassat and Iwamura on respectively m-phenylene\nbis(tert-butyl nitroxides) 2 and 3, ab initio calculations on m-benzoquinodimethane (la) and m-phenylene bis(nitroxide)\n(la) find that near dihedral angles of 4 = 90" between the benzene ring and the radical-be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCationic Aluminum Compounds with Potential Relevance to Lewis Acid CatalysisDavid A. Atwood, Jolin A. Jegier, and Drew RutherfordCite this: J. Am. Chem. Soc. 1995, 117, 25, 6779–6780Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published…
This paper reviews our current work on the synthesis of new organic-soluble aromatic polyamides and polyimides having high glass transition temperatures above 300 °C. Our strategy to achieve this goal is to introduce a bulky pendant phenyl group along the polymer backbone and to incorporate a crank and twisted non-cop…
Abstract Syntheses of parent polyaniline and methyl, methoxy, and ethoxy ortho‐substituted polyanilines were performed using the conventional chemical methodology and monitored using the new open‐circuit‐potential ( V oc ) profile technique. The intermediate pernigraniline oxidation state was identified and isolated a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and Physical Properties of Delocalized Mixed-Valent [Cp*M(pentalene)M'Cp*]n+ and [Cp*M(indacene)M'Cp*]n+ (M, M' = Fe, Co, Ni; n = 0, 1, 2) ComplexesJuan M. Manriquez, Michael D. Ward, William M. Reiff, Joseph C. Calabrese, Nancy L. Jones, Patrick J. Carroll, Emili…
The commercialization of new NLO materials will depend not only on the mastery of the technical problems but also on the availability of investment capital. Here, the research issues most relevant to commercialization are viewed and the advantages and disadvantages of new systems, both inorganic and organic, for examp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBifunctional Capping of CdS Nanoparticles and Bridging to TiO2Darren Lawless, Sudhir Kapoor, and Dan MeiselCite this: J. Phys. Chem. 1995, 99, 25, 10329–10335Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995https…
For the first time photo cross-linking of linearly polymerizable polymers (LPPs) is shown to induce uniaxial planar alignment in adjacent liquid crystal polymer (LCP)-layers on single substrates. Ways and novel materials allowing integration of LPP-aligning layers with optical retarders in patterned, hybrid LPP-LCP-co…
The systematic construction of graphite structures (for example see Figure and Cover picture) is within reach. These structures are formed accidentally on the surface of HOPG graphite due to the friction exerted by the tip of an atomic force microscope but could also be designed “to order”. The origin of the structure…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermoreversible Supramolecular Networks with Polymeric PropertiesC. B. St.Pourcain and A. C. GriffinCite this: Macromolecules 1995, 28, 12, 4116–4121Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995https://pubs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructures of Organogels Based upon Cholesteryl 4-(2-Anthryloxy)butanoate, a Highly Efficient Luminescing Gelator: Neutron and X-ray Small-Angle Scattering InvestigationsP. Terech, I. Furman, and R. G. WeissCite this: J. Phys. Chem. 1995, 99, 23, 9558–9566Publication Date (P…
Endogenous fatty acids are synthesized in all organisms in a pathway catalyzed by the fatty acid synthase complex. In bacteria, where the fatty acids are used primarily for incorporation into components of cell membranes, fatty acid synthase is made up of several independent cytoplasmic enzymes, each catalyzing one sp…
The ion-beam-induced transformation of insulating diamond to a conducting form of carbon is explored by performing measurements of the electrical conductivity of diamond subject to ion damage. A wide range of implantation temperatures (150--690 K) with both Xe (320 keV) and C (100 keV) ions are employed. The dose depe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChiral Assembly in Amorphous ABC Triblock Copolymers. Formation of a Helical Morphology in Polystyrene-block-polybutadiene-block-poly(methyl methacrylate) Block CopolymersUdo Krappe, Reimund Stadler, and Ingrid Voigt-MartinCite this: Macromolecules 1995, 28, 13, 4558–4561Pub…
ABSTRACT The sterol compositions of 14 species of marine diatoms were determined by gas chromatography and gas chromatography‐mass spectrometry. A variety of sterol profiles were found. The sterols 24‐methylcholesta‐5,22E‐dien‐3β‐ol, cholest‐5‐en‐3β‐ol, and 24‐methylcholesta‐5,24(28)‐dien‐3β‐ol, previously described a…
A task group of the JCPDS—International Center for Diffraction Data (ICDD) was established with the charge of investigating the use of silver behenate, CH 3 (CH 2 ) 20 COO·Ag, as a possible low-angle calibration standard for powder diffraction applications. Utilizing several data collection and analysis techniques, lo…