Dominique Roberto、Francesca Tessore、Renato Ugo 等 6 位作者2002-03-19Chemical Communications
The synthesis of 4'-(C6H4-p-NBU2)-2,2':6',2" -terpyridine and the strongly enhanced second-order NLO response of its Zn(II), Ru(III) and Ir(III)complexes are reported, evidencing for the first time a shift from positive to negative value of the ligand quadratic hyperpolarizability by varying the nature of the metal ce…
Metal complexes synthesis and propertiesNonlinear Optical Materials ResearchChemical synthesis and pharmacological studies
Gabriel A. Planes、Marı́a C. Miras、César A. Barbero2002-03-19Polymer International
Abstract Poly( N ‐methylaniline) thin films show different cyclic voltammetric behaviour when cycled in HClO 4 , HBF 4 , HCl or HNO 3 . While in the first two acids the film shows profiles peak potentials similar to those of polyaniline, profiles in HCl and HNO 3 show higher peak potentials for oxidation and a differe…
Conducting polymers and applicationsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors
H. R. Xia、L. X. Li、Bing Teng 等 7 位作者2002-03-19Journal of Raman Spectroscopy
Abstract Bismuth triborate, BiB 3 O 6 (BiBO), a promising new material for effective frequency conversion, was synthesized by top‐seeded growth from the nearly stoichiometric melt at high temperature. The crystal space group is non‐centrosymmetric monoclinic C 2 with Z = 2. The lattice constants were a = 7.116(2), b =…
High-pressure geophysics and materialsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Lay Poh Tan、C. Y. Yue、Kam Chiu Tam 等 5 位作者2002-03-19Polymer International
Abstract Studies were conducted on the effects of shear rate, viscosity ratio and liquid crystalline polymer (LCP) content on the morphological and mechanical properties of polycarbonate (PC) and LCP blends. The LCP (LC5000) used was a thermotropic liquid crystalline polymer consisting of 80/20 of parahydroxybenzoic a…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Foaming and Composites
Tatsuro Ouchi、Hidetake Miyazaki、Hidetoshi Arimura 等 6 位作者2002-03-19Journal of Polymer Science Part A Polymer Chemistry
Abstract Amphiphilic AB‐type diblock copolymers composed of hydrophobic poly( L ‐lactide) (PLA) segments and hydrophilic poly(glycolic acid lysine) [poly(Glc‐Lys)] segments with amino side‐chain groups self‐associated to form PLA‐based polymeric micelles with amino surfaces in an aqueous solution. The average diameter…
Nanoparticle-Based Drug Deliverybiodegradable polymer synthesis and propertiesAdvanced Drug Delivery Systems
Rita Aparecida Zoppi、M. Clara Gonçalves2002-03-19Journal of Applied Polymer Science
Abstract Hybrids based on cellulose acetate (CA) and SiO 2 were prepared by hydrolysis of tetraethoxysilane (TEOS). More rigid films were obtained with an inorganic phase incorporation. The thermal stability of the hybrids was similar to pure CA. Composite membranes were prepared by casting of CA/TEOS mixtures onto a…
Surface Modification and SuperhydrophobicityAdvanced Cellulose Research StudiesBuilding materials and conservation
Henry P. Pinto、Arvids Stashans2002-03-19Physical review. B, Condensed matter
We have used a quantum-chemical method developed for crystal calculations to investigate self-trapped hole polarons in technologically important ${\mathrm{BaTiO}}_{3}$ perovskite-type crystal. The tetragonal structure of this material is considered in the present work. The computations are carried out in a self-consis…
Ferroelectric and Piezoelectric MaterialsSemiconductor materials and devicesElectronic and Structural Properties of Oxides
Randy L. Vander Wal、Gordon M. Berger、Lee J. Hall2002-03-19The Journal of Physical Chemistry B
Filter paper, loaded with catalyst precursor, is burned to generate catalyst nanoparticles for single-wall nanotube (SWNT) synthesis in a two-stage flame. A first-stage diffusion flame creates the Fe nanoparticles as an aerosol in the post-flame gases for catalysis. A second-stage flame is formed by the first-stage di…
Carbon Nanotubes in CompositesGraphene research and applicationsChemical and Physical Properties of Materials
Antonio Cravino、Helmut Neugebauer、S. Luzzati 等 7 位作者2002-03-19The Journal of Physical Chemistry B
Poly(dithienothiophene)s (PDTTs), low band-gap conjugated polymers with polythiophene-like chain where an aromatic thienothiophene moiety is fused to each thiophene ring, were studied using Raman spectroscopy, photoinduced infrared absorption, as well as attenuated total reflection Fourier transform infrared (ATR-FTIR…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSemiconductor materials and interfaces
K. Kasthuri Rangan、Pantelis N. Trikalitis、Christian P. Canlas 等 6 位作者2002-03-19Nano Letters
We present the first report of hexagonally ordered mesostructured ternary metal tin sulfide materials along with their structure and optical properties. The new mesophases designated as (CP) x M y Sn 2 S 6 (M = Zn 2+, Cd 2+, Ga 3+ ) where synthesized by linking [Sn 2 S 6 ] 4- clusters with metal ions in the presence o…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCrystal Structures and Properties
Weiying Lin、David S. Lawrence2002-03-19The Journal of Organic Chemistry
Caged analogues of biologically active compounds have received widespread attention as temporally and spatially controlled probes of cell-based processes. Recently, a coumarin-4-ylmethyl derivative has been used to cage carboxylates, sulfonates, carbamates, and phosphates. We describe herein a synthetic strategy that…
Radical Photochemical ReactionsPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research
Pedro Amorós、D. Beltrán、Carmen Guillem 等 4 位作者2002-03-19Chemistry of Materials
The reaction of poly(dimethylsilane) (PDMS) and poly(dimethylcarbosilane) (PCS) with bis(cyclopentadienyl)M dichloride Cp 2 MCl 2 (M = Ti, Zr, Hf) complexes has been used as a new route to obtain ceramic materials based on SiC-containing M. The reaction is completed at a relatively low temperature, 900 °C, yielding th…
Advanced ceramic materials synthesisDiamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials Research
Glória C. Ferreira、Ricardo Franco、Arianna Mangravita 等 4 位作者2002-03-19Biochemistry
Ferrochelatase (EC 4.99.1.1), the terminal enzyme of the heme biosynthetic pathway, catalyzes the insertion of ferrous iron into the protoporphyrin IX ring. Ferrochelatases can be arbitrarily divided into two broad categories: those with and those without a [2Fe-2S] center. In this work we have used X-ray absorption s…
Folate and B Vitamins ResearchEnzyme Structure and FunctionDigestive system and related health
Yiwei Tan、Yongfang Li、Daoben Zhu2002-03-19Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTFabrication of Gold Nanoparticles Using a Trithiol (Thiocyanuric Acid) as the Capping AgentYiwei Tan, Yongfang Li, and Daoben ZhuView Author Information Laboratory of Organic Solids, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 1000…
Gold and Silver Nanoparticles Synthesis and ApplicationsMolecular Junctions and NanostructuresNanomaterials for catalytic reactions
Jin Liu、Dezhu Ma2002-03-19Journal of Applied Polymer Science
Abstract Different multiple hard segment polyurethane–imide copolymers (MHPUI) were synthesized and characterized. FTIR spectroscopy confirmed the characteristic absorption of the MHPUI copolymer. The difference in the imide group FTIR absorption bands in different MH segment PUI copolymers was found in this study and…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingSynthesis and properties of polymers
Yu. I. Yuzyuk、V. A. Alyoshin、I. N. Zakharchenko 等 6 位作者2002-03-19Physical review. B, Condensed matter
We have studied the concentration dependence of the Raman spectra of heteroepitaxial $({\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}){\mathrm{TiO}}_{3}$ (BST) $(x=0,$ 0.15, 0.30, and 0.45) thin films deposited by rf sputtering on (001) MgO substrates. It is found that substitution of Ba by Sr leads to the distorti…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectronic and Structural Properties of Oxides
Orlando Auciello and Alan R Krauss2002-03-19Measurement Science and Technology
The application of thin film materials in advanced technologies is increasing as new generations of complex electronic, optical and magnetic devices are developed. The dynamics of the growth of thin and ultra-thin films and their evolving, dimensionally dependent, properties are of crucial importance in understanding…
Optical Coatings and GratingsElectron and X-Ray Spectroscopy TechniquesSurface Roughness and Optical Measurements
Young Joo Lee、Clare P. Grey2002-03-19The Journal of Physical Chemistry B
Li 2 MnO 3 and the spinel LiZn 0.5 Mn 1.5 O 4 each contain a subset of lithium ions in very similar octahedral environments, in terms of the Li−O−Mn connectivities (i.e., numbers of nearby manganese ions and Li−O−Mn bond angles). We show, however, that the different geometric arrangements of the Mn ions about the lith…
Advancements in Battery MaterialsMultiferroics and related materialsAdvanced NMR Techniques and Applications
Toshiaki Fukui、Hideki Abe、Yoshiharu Doi2002-03-19Biomacromolecules
Recombinant Ralstonia eutropha capable of producing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer [P(3HB-co-3HHx)] from fructose was engineered by introduction of genes for crotonyl-CoA reductase (CCR) from Streptomyces cinnamonensis (ccrSc) and for PHA synthase and (R)-specific enoyl-CoA hydratase from Aero…
Biofuel production and bioconversionEnzyme Catalysis and Immobilizationbiodegradable polymer synthesis and properties
Jussi Enkovaara、A. Ayuela、Lars Nordström 等 4 位作者2002-03-19Physical review. B, Condensed matter
We study here, within the density-functional theory, the magnetic anisotropy energy (MAE) in ${\mathrm{Ni}}_{2}\mathrm{MnGa}$ which is a prototype of a magnetic shape-memory alloy. We calculate the MAE, which is a key property for the magnetic shape-memory effect, for tetragonal structure with different ratios of the…
Magnetic and transport properties of perovskites and related materialsShape Memory Alloy TransformationsMagnetic Properties and Applications