Jean‐François Bartoli、Karine Le Barch、Magali Palacio 等 5 位作者2001-01-01Chemical Communications
A series of iron porphyrins bearing one to eight beta-nitro substituents were synthesized and evalauted as catalysts for hydrocarbon oxidation with H2O2; iron porphyrins bearing five or six beta-nitro groups were the best catalysts for cyclooctene epoxidation and adamantane or anisole hydroxylation without need of a c…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsHeme Oxygenase-1 and Carbon Monoxide
Francisco Javier Vallejo、J. I. Eguiaz�bal、J. Naz�bal2001-01-01Journal of Applied Polymer Science
Extrusion-blended and injection-molded PEI/PBT blends were found to be miscible whatever the composition. The processability of the blends clearly improved with the presence of PBT. The melt pressure at the exit was seen to be a parameter as representative of the processability of the blends as the torque of blending.…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
Yu Liu、Abhijeet Karkamkar、Thomas J. Pinnavaia2001-01-01Chemical Communications
In contrast to earlier methods requiring the presence of organic modifiers for the preparation of cubic MCM-48 mesostructures from low cost sodium silicate, we show that this three dimensional framework structure can be readily assembled in the absence of co-surfactants simply by using the overall SiO2/OH- ratio as me…
Metal-Organic Frameworks: Synthesis and ApplicationsZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Holger Kautz、Alexander Sunder、Holger Frey2001-01-01Macromolecular Symposia
Hyperbranched polyglycerols exceeding Mn > 15,000 g/mol (DPn > 270) have been prepared, using a modified version of the synthetic protocol reported earlier. In the optimized process polydispersities recorded by SEC remained narrow, with Mw/Mn < 1.7 over a large molecular weight range. The drastic increase of viscositi…
Fuel Cells and Related MaterialsSynthetic Organic Chemistry MethodsDendrimers and Hyperbranched Polymers
Sang-Keun Oh、Masaru Nakagawa、Kunihiro Ichimura2001-01-01Journal of Materials Chemistry
This paper describes the correlation between the ability to control nematic liquid crystal (LC) alignment and wetting properties of mixed monolayers formed by coadsorption of two O-octacarboxymethylated calix[4]resorcinarenes (CRA-CMs) with either perfluorooctyl- or octylazobenzene units. Photoirradiation of CRA-CM mo…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsPhotochromic and Fluorescence Chemistry
Longzhen Zheng、Shouguo Wu、Xiangqin Lin 等 5 位作者2001-01-01The Analyst
An over-oxidized poly(N-acetylaniline) (PNAANI)/GCE was used to determine dopamine (DA) in a large excess of ascorbic acid (AA) by differential pulse voltammetry. A linear relation between Ip and DA concentration was found over the range 5.0 x 10(-7) to 2.0 x 10(-5) M. The detection limit was 1.68 x 10(-8) M for S/N =…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Li Han、Mathew M. Maye、Frank L. Leibowitz 等 5 位作者2001-01-01Journal of Materials Chemistry
Spontaneous core–shell and shell–shell reactivities of thiolate-capped nanoparticles are exploited for assembling nanoparticle network thin films via an exchange–crosslinking–precipitation route. Gold nanoparticles of two different core sizes (2 and 5 nm) capped with decanethiolates and alkylthiols of two different fu…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Rabah Boukherroub、Danial D. M. Wayner、D. J. Lockwood 等 4 位作者2001-01-01Journal of The Electrochemical Society
Freshly prepared porous silicon (PSi) surfaces have been modified with different organic molecules such as alkenes (1-decene, ethyl undecylenate) and nonconjugated dienes (1,7-octadiene) in a thermal process to yield organic monolayers covalently attached to the surface through Si-C bonds. These monolayers have been c…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
S.K. Kulshreshtha、R. Sasikala、Vasanth Sudarsan2001-01-01Journal of Materials Chemistry
Mixed oxide samples of Sn1 − xTixO2 (0.0 ≤ x ≤ 1.0), prepared by the co-precipitation method followed by heating at variable temperatures, have been investigated by powder X-ray diffraction and 119Sn MAS NMR spectroscopy. Based on powder X-ray diffraction studies, the formation of solid solutions has been observed for…
Ferroelectric and Piezoelectric MaterialsSemiconductor materials and devicesAcoustic Wave Resonator Technologies
S?M Sayyah、A?A Abd El-Khalek、A. A. Bahgat 等 4 位作者2001-01-01Polymer International
Aqueous polymerization of 3-chloroaniline (mCA) was studied using sodium dichromate as oxidant in the presence of hydrochloric acid. The effect of hydrochloric acid, sodium dichromate and monomer concentration on the polymerization rate, specific viscosity of the obtained polymer and ac conductivity was investigated.…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Wuliang Xu、Weiyi Jia、Iris Revira 等 5 位作者2001-01-01Journal of The Electrochemical Society
Polycrystal pellets and single-crystal fibers of doped with were prepared. Spectroscopic studies reveal that the ions occupied three nonequivalent sites, with two at sites and one at sites. Their emission lines for to transition are located at 578.1, 580.0, and 581.0 nm, respectively. Dominant emission originates from…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsLanthanide and Transition Metal Complexes
Colette Boskovic、Euan K. Brechin、William E. Streib 等 6 位作者2001-01-01Chemical Communications
The reaction of (NBun4)[Mn8O6Cl6(O 2CPh)7(H2O)2] with 2-(hydroxymethyl)pyridine (hmpH) or 2-(hydroxyethyl)pyridine (hepH) gives the MnII2MnIII10 complexes [Mn12O8- Cl4(O2CPh)8(hxp)6] [hxp− = hmp− (1) or hep− (2)]; these compounds are core isomers with markedly different magnetic properties, compound 1 having an S = 7…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
Toshiyuki Hirano、Koji Ueda、Masao Mukaida 等 5 位作者2001-01-01Journal of the Chemical Society Dalton Transactions
[RuCl2(NO)(terpy)]PF6 ([1]PF6) has been synthesized by the reaction of K2[RuCl5(NO)] with terpy and characterized by single-crystal X-ray crystallography. [1]PF6 has a structure in which the two chloro ligands are located trans to each other with the nitrosyl ligand on the plane of the terpy ligand. Reactions of [1]PF…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesInorganic Fluorides and Related Compounds
San Ping Jiang2001-01-01Journal of The Electrochemical Society
A novel cell configuration has been proposed to measure resistance distribution in solid oxide fuel cells (SOFCs). In this configuration, special voltage probes which were not spot-welded to the current collector were used in addition to the conventional voltage probes which were spot-welded to the current collector.…
Advancements in Solid Oxide Fuel CellsFuel Cells and Related MaterialsElectronic and Structural Properties of Oxides
Lucie Bačáková、K. Walachová、Václav Švorcˇík 等 4 位作者2001-01-01Journal of Biomaterials Science Polymer Edition
Polyethylene was implanted with 30-keV oxygen (PE/O+) or 23-keV carbon ions (PE/C+) at 1013 to 5 × 1015 ions cm-2 doses in order to improve the adhesion of vascular smooth muscle cell (VSMC) to the polymer surface in vitro because of its oxidation and carbon-enrichment. The concentration of-CO- groups in the PE/O+ and…
Bone Tissue Engineering MaterialsElectrospun Nanofibers in Biomedical ApplicationsPolymer Nanocomposite Synthesis and Irradiation
Yutian Zhuang、X.M. Zhang、Linlin Zhu 等 4 位作者2001-01-01Science and Technology of Advanced Materials
The Al–Al3Ni eutectic was directionally solidified at a thermal gradient of 4.5 K/mm in a vacuum Bridgman–type furnace in order to study eutectic spacing selection criterion.The microstructure was examined in transverse and longitudinal sections and the interrod spacings were measured at different growth velocity. It…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMetallurgical Processes and Thermodynamics
Christoph Lambert、Wolfgang Gaschler、Gilbert Nöll 等 7 位作者2001-01-01Journal of the Chemical Society Perkin Transactions 2
Cationic NLO-chromophores based on tolane π-systems in which conventional electron donors are combined with ionic pyridinio or triorganoammonio and -phosphonio substituents, respectively, perform much better than conventional donor/acceptor-substituted (D/A-substituted) tolanes concerning their hyperpolarisability–tra…
Crystal structures of chemical compoundsNonlinear Optical Materials ResearchLuminescence and Fluorescent Materials
Charles Michael Drain、Xinxu Shi、Tatjana Milic 等 4 位作者2001-01-01Chemical Communications
Discrete squares and tapes of porphyrins are self-assembled by self-complementary hydrogen bonding between diacetamidopyridyl recognition groups rigidly linked to the chromophore.
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistrySupramolecular Self-Assembly in Materials
Chi‐Ming Che、Chun-Wai Wan、Lin Wei-Zhu 等 7 位作者2001-01-01Chemical Communications
Two functionalized bipyrroles, 3,3′,5,5′-tetraethoxycarbonyl-4,4′-dipropyl-2,2′-b ipyrrole 1 and 3,3′,5,5′-tetraethoxycarbonyl-4,4′-diphenyl-2,2′-b ipyrrole 2, are highly luminescent materials at room conditions; they show UV emission at λmax = 416 (1) and 414 nm (2) with quantum yields close to unity in the solid sta…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsLuminescence and Fluorescent Materials
Gresham T. Weatherly、Gary J. Pielak2001-01-01Protein Science
The cytoplasm contains high concentrations of cosolutes. These cosolutes include macromolecules and small organic molecules called osmolytes. However, most biophysical studies of proteins are conducted in dilute solutions. Two broad classes of models have been used to describe the interaction between osmolytes and pro…
Protein Structure and DynamicsProtein purification and stabilityEnzyme Structure and Function