Materials Literature
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In this paper we reported that low temperature plasma may reverse the direction of a chemical reaction. The thermodynamically forbidden reaction between H 2 and AlCl 3 was able to take place with the assistance of low temperature plasma, yielding metal Al. The plasma chemistry of the reaction was investigated by optic…
The structure and ferroelectric properties of PbZr 0.53 Ti 0.47 O 3 thin films were investigated in detail by using the x-ray diffraction technique. The surface morphology of the film was studied by using the atomic force microscopy technique, showing a film with a dense morphology and a smooth surface. Based on recen…
Lyotropic liquid crystalline phases have immediate relevance in biology because of the prevalence of organized lipid structures in living systems. The incorporation of hydrophilic reagents in water domains with well-defined nanoscale geometry favors the construction of nanostructured materials of inorganics, and/or th…
Abstract A series of conjugated alternating and statistical copolymers of fluorene and pyridine are synthesized and characterized. The compounds under investigation, namely poly[2,7‐(9,9‐dihexylfluorenyl)‐ alt ‐(2,6‐pyridinyl)] and poly[2,7‐(9,9‐dihexylfluorenyl)‐ stat ‐(2,6‐pyridinyl)], are prepared by a Suzuki‐type…
Structures and the gelation property of a series of primary ammonium hydrogen dicarboxylate salts derived from cyclobutane-1,1-dicarboxylic acid and n-alkyl amines, that is, Me-(CH 2 ) n -NH 2 ( n = 3−15, reacted in 1:1 molar ratio) have been studied systematically as a function of alkyl chain length. While salts with…
Abstract The terminal alkyne homocoupling reaction (oxidative alkyne coupling) is presented here as a new route for the preparation of A 2 B 2 type 4‐miktoarm star copolymer. The block copolymer with terminal alkyne at the junction point prepared by NMP‐ATRP and ROP‐NMP sequential routes is coupled via diyne formation…
A novel tetraethylenepentamine (TEPA)-directed method has been successfully developed for the controlled synthesis of ZnSe particles with distinctive morphologies, including nanobelts, nanowires, and hierarchically solid/hollow spheres. These structures, self-assembled from nanobelts and nanorods, have been synthesize…
A generic family of low molecular weight binary gels comprising beta-cyclodextrin (beta-CD) and one of a large variety of polyaromatic hydrocarbons (PAHs) in dimethylformamide (DMF), pyridine, and other polar solvents is described. The system is rather general and robust. It tolerates large changes in each of the majo…
The photochemical ring opening of 1,2-dihydronaphthalene (DHN) was investigated using two complementary computational approaches. CASPT2//CASSCF minimum energy paths were characterized for reaction channels on the three lowest-energy singlet excited states, describing initial evolution of the spectroscopic bright (ion…
We fabricated epitaxial (1− x )BiFeO 3 – x BaTiO 3 ( x = 0.1–0.7) solid solution films on niobium doped SrTiO 3 (001) substrate. The x-ray diffraction analysis of the films indicates compressively strained growth for the composition x <0.3 and strain relaxed growth for the composition x ≥0.3. Correspondingly, the film…
Abstract We developed a mathematical model to describe the solution polymerization of olefins with two single‐site catalysts in a series of two CSTRs. The model was used to simulate processes where semi‐crystalline macromonomers produced in the first reactor are incorporated as long chain branches onto amorphous (or l…
Because of the competition between the spin-orbit coupling and the Jahn-Teller (JT) energies in Fe(II)Fe(III) bimetallic oxalates, we theoretically predict that an undistorted phase with C3 symmetry about each Fe site may be recovered at low temperatures. Both lower and upper JT transitions bracketing the ferrimagneti…
A yellow-emitting Tb(3)Al(5)O(12):Ce(3+) (TAG:Ce) phosphor was coated on blue light-emitting diodes (LEDs) to obtain white LEDs (WLEDs). Since TAG:Ce showed 90% of the brightness of Y(3)Al(5)O(12):Ce(3+) (YAG:Ce), it was expected that TAG:Ce-based WLEDs showed 90% of brightness of YAG:Ce-based ones. However, the TAG:C…
Abstract A new type of regenerated cellulose fiber can be made from bamboo cellulose by the Lyocell process. In this paper, the morphology and crystal structure of the bamboo Lyocell fiber was investigated by optical microscopy, scanning electron microscopy, and wide angle X-ray diffractometry. Moreover, the mechanica…
To understand the role of titanium in catalyzing the de/rehydrogenation reactions in NaAlH 4, it is necessary to determine the composition and structure of the catalytically active species that is (are) formed during ball milling and de/rehydrogenation reactions. One of the species that is thought to be catalytically…
Abstract Graft copolymers of CA and CB with PCL were prepared at compositions rich in PCL. Kinetic DSC data were analyzed in terms of a folded‐chain crystallization formula expanded for a binary mixing system of amorphous/crystalline polymers. The order of crystallization rates was plain PCL > CA‐ g ‐PCL (DS = 2.98…
ADVERTISEMENT RETURN TO ISSUEPREVBook ReviewNEXTCrystal Growth Technology: From Fundamentals and Simulation to Large-Scale ProductionLiya L. Regel and William R. WilcoxView Author Information Clarkson UniversityCite this: Cryst. Growth Des. 2008, 8, 11, 4190Publication Date (Web):September 12, 2008Publication History…
The magnetic properties and magnetic structures from neutron diffraction of two synthetic natrochalcites, NaM(II)2(H3O2)(MoO4)2, M = Co (1Co) or Ni (2Ni), are reported. They are isostructural (monoclinic C2/m) and consist of chains of edge-shared MO6 octahedra connected by mu-O from H3O2(-) and MoO4(2-). These chains…
As is well-known, the formation of nacre is governed by the cooperation of soluble macromolecules and insoluble predeposited matrix which is composed of β-chitin and silk fibroin-like protein. However, little is known about the influence of silk fibroin on the biomineralization of CaCO 3 . In this paper, we described…
A series of dialuminum compounds have been synthesized and their reactivity and application for lactide polymerization have been studied. The reaction of AlH3 x NMe3 with [C4H3NH(2-CH2NHtBu)] in diethyl ether generated a dimeric aluminum hydride compound, [[[C4H3N(2-CH2NtBu)]AlH]2] (1). The structure of 1 was confirme…