Materials Literature
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It is shown that is an excellent host lattice to obtain efficient VUV excited photoluminescent materials at room temperature. The introduction of ions in the lanthanum metaborate host lattice increases both the ionicity of the metal‐ligand bonding and the energy transfer rate between the host and the activator.
1,3,5-Tris(1-naphthyl)benzene ( 1 ), 1,3-bis(1-naphthyl)-5-(2-naphthyl)benzene ( 2 ), and 1-(1-naphthyl)-3,5-bis(2-naphthyl)benzene ( 3 ) easily supercool and form glasses on cooling from the melt. We synthesized 1, 2, and 3 using Suzuki's conditions to effect the cross-coupling reactions of 1,3,5-tribromobenzene with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of B, BH, BH2, and BmHn Species: Thermochemistry and KineticsS. H. BauerView Author Information Cornell University, Department of Chemistry, Baker Laboratory, Ithaca, New York 14853-1301 Cite this: Chem. Rev. 1996, 96, 6, 1907–1916Publication Date (Web):October 1,…
Abstract
A novel approach has been proposed to describe the relationship between the conductivity and relative density of highly porous materials. As a first approximation, porous material was represented by a uniaxial string of spheres along the direction of the potential gradient. Then, a string of spheres was remodeled into…
A realistic model of transport properties of zinc oxide varistors is constructed from two-dimensional Voronoi networks and studied via computer simulations. In agreement with experimental microcontact measurements made on individual junctions, the networks are assumed to contain randomly distributed microjunctions of…
This paper presents a novel class of nonlinear optical (NLO) polymer for second harmonic generation (SHG). This new class of NLO polymer consists of the linear polyurethane, T-polymer, of tolylene 2,4-diisocyanate (TDI) with 3-[(2-hydroxyethyl)amino]-5-(hydroxymethyl)-4‘-nitroazobenzene (T-AZODIOL), whose dipole momen…
Methyl cellulose has been used as a stabilizer in the oxidative dispersion polymerization of aniline using ammonium persulfate oxidant. The dispersion polymerization is unsuccessful in water but successfully effected in aqueous alcohol media. Evidence has been presented that the stabilizer incorporation in polyaniline…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTReversible Photochromism of a Crystalline Dithienylethene Copper(I) PolymerMegumu Munakata, Liang Ping Wu, Takayoshi Kuroda-Sowa, Masahiko Maekawa, Yusaku Suenaga, and Koji FuruichiView Author Information Department of Chemistry, Kinki University, Kowakae Higashi-Osaka…
Nineteen cutting-edge articles by leading practitioners review critical issues concerning biocompatible materials-polymers, metals, and other materials-used in or on the human body. Topics range from
The trinuclear complex (&mgr;(3)-CO(3))[Ni(3)(Medpt)(3)(NCS)(4)] was obtained by reaction of basic solutions of nickel(II), Medpt (bis(3aminopropyl)methylamine) and thiocyanate ligand with atmospheric CO(2) or by simple reaction with carbonate anion. (&mgr;(3)-CO(3))[Ni(3)(Medpt)(3)(NCS)(4)] crystallizes in the tricli…
Protein B23 is a major nonribosomal nucleolar protein and putative ribosome assembly factor that has been demonstrated to form oligomers. Sedimentation velocity and equilibrium analyses were used to examine the oligomerization properties of recombinant proteins B23.1 and B23.2. Under low ionic strength conditions prot…
Treatment of high-concentration wastewater from a chemical company by wet air oxidation (WAO) is studied. Experiments were conducted to investigate the effects of the operating pressure and temperature on the chemical oxygen demand (COD) removal. Both air and oxygen were employed as the oxygen supply for the WAO treat…
In this study, we reported that fatty acid hydroperoxides and hydrogen peroxide are capable of epoxidizing 4-hydroxy-2-nonenal, a lipid peroxidation product, to the mutagenic epoxide. The evidence of its formation is provided (i) by trapping with [8-3H]deoxyadenosine for the formation of 7-(1',2'-dihydroxyheptyl)-1,N6…
Based on our previous works, we propose a new model for damage structure of graphite based on sp 2 to sp 3 transition of carbon atoms that can explain the change of the materials' parameters observed both in damaging and annealing processes. In early stage of the irradiation, defects are produced in a basal plane and/…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSolid State Photochemistry of Cu2(OH2)2(O2C(CH2)4CH3)4 in Thin Films: The Photochemical Formation of High-Quality Films of Copper and Copper(I) Oxide. Demonstration of a Novel Lithographic Technique for the Patterning of CopperAlfred A. Avey and Ross H. HillView Author…
Two bis[2-(3,4-ethylenedioxy)thienyl]carbazole-based polymers are synthesized by the electropolymerization of highly conjugated, low-oxidation potential monomers; these polymers exhibit multicolour electrochromic behaviour, each possessing three separate accessible states.
We report here the synthesis of the ligand 1-(( p -nitrophenyl)carboxymethyl)-4,7,10-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane ( 3 ) and its La(III), Gd(III), Ho(III), and Yb(III) complexes. The introduction of the p -nitrophenyl substituent on the methylenic carbon of one acetate group does not alter the ove…
A series of regioregular head-to-tail poly[3-(alkylthio)thiophenes] have been synthesized. The synthetic approach includes the in-situ preparation of 2-bromo-3-(alkylthio)-5-(bromozincio)thiophenes via regiospecific oxidative addition of Rieke zinc (Zn*) to 2,5-dibromo-3-(alkylthio)thiophenes, and the regiospecific po…
We report the crystal structure at 1 Å resolution of europium bound to diethylenetriaminepentaacetate covalently coupled to an organic chromophore, carbostyril 124 (DTPA-cs124; carbostyril 124 = 7-amino-4-methyl-2(1 H )-quinolinone). The complex is highly luminescent in solution and in the crystal form. The Eu-DTPA-cs…