Materials Literature
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Ferrimagnetic coupling in a mesogen is reported for the first time for the compound Mn III [((OC 12 H 25 ) 4 TPP)](TCNE) · 2 touluene (where TPP = tetraphenyl porphyrin, TCNE – tetracyanoethylene), which displays liquid crystal properties above 381 K and ferrimagnetic properties below 21.4 K. The results from differen…
Partial table of contents: Polyacetylene (S. Curran, et al.). Electrically Conductive Polyacetylene Copolymers (L. Leung). Synthesis and Properties of Processable Polythiophenes (K. Kaeriyama). Molecular Conductive Materials: Polythiophenes and Oligothiophenes (S. Hotta). Polythiophene and Polypyrrole Copolymers (R. G…
The scope, usability, limitations and predictive power of four modeling methodologies are analyzed in this paper: mathematical models, empirical models, computer simulation models, and artificial neural network models. The predictive power of each of the four is estimated by comparing predicted yarn strength with expe…
Polyaniline emeraldine base 1 can be easily modified by pyrrolidine and other nucleophiles, e.g. piperidine, morpholine, alkane-1-thiols and mercaptoacetic acid, presumably via a concurrent reduction and substitution mechanism.
The second-order nonlinear optical (NLO) and electronic properties of stilbenes (CC bridge), benzylideneanilines (CN and NC bridges) and azobenzenes (NN bridge) containing either an N,N-dimethylamino donor and/or a nitro acceptor were investigated using EFISH, UV spectroscopy, cyclic voltammetry and PPP/SCF calculatio…
The reaction of thulium(II) iodide with 2 equiv. of lithium naphthalenide in dme (dme = 1,2-dimethoxyethane) yields a binuclear thulium(III) complex with one bridging and two terminal dianions of naphthalene [{Tm(dme)} 2 (η 2 -C 10 H 8 ) 2 (η 2 -η 4 :η 4 -C 10 H 8 )] 1.
Lanthanide sensitized luminescence is a very attractive alternative to UV detection and other luminescence techniques, i.e., fluorescence and phosphorescence, in separation science for the detection of drugs and xenobiotics because of the large Stokes shift, narrow emission bands and long lifetime. Some published appl…
We constructed a partial isothermal phase diagram including a decagonal (d-) phase in the Al–Ni–Co system and determined the composition of the liquid in equilibrium with the stoichiometric d-phase. The d-phase is formed through a peritectic reaction between the B2 phase and the liquid phase. A seed d-phase prepared b…
The chemistry of pyrolytic conversion has been studied for three polysilazanes, (ViSiHNH) n , (ViSiHNMe) n and [(ViSiHNH) 0.5 –(MeSiHNH) 0.5 ] n , precursors to silicon carbonitride ceramics. 13 C and 29 Si MAS and CPMAS NMR spectroscopies were used to clarify the processes leading to the formation of the silicon-base…
With Li x MoO 3 (x=0.31–0.40) as a host material, a new family of polymer–molybdenum bronze nanocomposites has been synthesized using an exfoliation/encapsulation methodology. Nanocomposites with poly(ethylene oxide), poly(ethylene glycol), poly(propylene glycol), poly(vinylpyrrolidinone), methyl cellulose, polyacryla…
Separation of acetic acid from palm oil mill effluent (POME) to increase its concentration by an anion exchange resin was examined as a preliminary study for its recovery from POME that had been anaerobically treated by sludge from a palm oil mill. This paper concerns the acetic acid thus separated for producing bacte…
Partial table of contents: Molecular Nonlinear Optics: Fundamentals and Applications (I. Ledoux & J. Zyss). Cascading: A Promising Approach to Nonlinear Optical Phenomena (G. Stegeman, et al.). Nonlinear Effects in Nematics Doped by Dyes and Chiral Agents (G. Abbate, et al.). New Nonlinear Materials for High--Power Fr…
Silica gel combined with potassium carbonate is an effective fire retardant for a wide variety of common polymers (at mass fraction of only 10% total additive) such as polypropylene, nylon, polymethylmethacrylate, poly(vinyl alcohol), cellulose, and to a lesser extent polystyrene and styrene-acrylonitrile. The peak he…
On the approach of corrosion protection of metal by TiO2 coating under illumination, the effects of iron oxides on the photoelectrochemical response of TiO2/carbon steel were studied. The iron oxides, magnetite (Fe3O4), maghemite (γ-Fe2O3) and hematite (α-Fe2O3), were prepared on the carbon steel by using both the che…
Monazite powder, prepared by heating rhabdophane-(La, Ce, Nd or Sm) at 600°C for 2 hours in air, was dry-pressed to disks and bars. The disks and bars of monazite could be sintered to the relative density (100·bulk density/true density) of larger than 99 % at 1200°C in air without cracking. The linear thermal expansio…
Lanthanide thiolates react with elemental sulfur to give Ln8S6(SPh)12(thf)8 clusters in high yield.
RATIONALE AND OBJECTIVES: Surface-modified contrast-carrying liposomes potentially are useful as computed tomography (CT) blood-pool agents. The biodistribution and CT-imaging behavior of conventional as well as polyethylene glycol (PEG)-coated iopromide-carrying liposomes were tested. Two different types of PEG-ylate…
A poly(amidoamine) hyperbranched AB2/B6 copolymer displays a viscosity/molecular weight profile similar to that shown by perfectly regular dendrimers.
Binary metal Mg–Co oxide materials have been synthesized from Mg–Co hydroxide precursors by a coprecipitation-then-calcination method. The oxide system shows high catalytic activity for low-temperature decomposition of N 2 O (27 mol%). Using FTIR, XRD, SEM, EA, DSC, BET and GC techniques, the hydrothermal synthesis an…
Two dinuclear nickel(II) complexes [Ni 2 (C 2 O 4 )(tren) 2 ][ClO 4 ] 2 1 and [Ni 2 (C 4 O 4 )(tren) 2 (H 2 O) 2 ][ClO 4 ] 2 2 [tren = tris(2-aminoethyl)amine, C 2 O 4 2- = oxalate dianion and C 4 O 4 2- = dianion of 3,4-dihydroxycyclobut-3-en-1,2-dione (squaric acid)] have been synthesized and characterized by single…