Dipak Kalita、Mitsuhiko Morisue、Yoshiaki Kobuke2005-11-10New Journal of Chemistry
A systematic series of ferrocene-functionalized Zn-imidazolyl-porphyrins were synthesized to assemble into the slipped-cofacial porphyrin dimers through imidazolyl-to-zinc complementary coordination as artificial photosynthetic models. Direct substitution at the meso position of the porphyrin ring with ferrocence and…
Electrocatalysts for Energy ConversionPhotosynthetic Processes and MechanismsPorphyrin and Phthalocyanine Chemistry
Yu-Mei Dai、Xiaoqin Wang、Jinfeng Huang2005-11-10Acta Crystallographica Section E Structure Reports Online
The title compound, [Sm2(C10H2O8)(C10H4O8)(H2O)2]n or [Sm2(btec)(H2btec)(H2O)2]n, was synthesized hydrothermally by the reaction of Sm2O3 with 1,2,4,5-benzenetetracarboxylic acid (H4btec). The Sm atom is coordinated by nine O atoms, three from H2btec2−, five from btec4− and one from a coordinated water molecule.…
Metal-Organic Frameworks: Synthesis and ApplicationsLanthanide and Transition Metal ComplexesPolyoxometalates: Synthesis and Applications
Włodzimierz Gałęzowski、Maciej Kubicki2005-11-10Inorganic Chemistry
The first crystallographic data for sigma-bonded alkylcobalt(III) phthalocyanine complexes are reported. A single-crystal X-ray structure of CH(3)CH(2)Co(III)Pc (Pc = dianion of phthalocyanine) reveals that the solid consists of centrosymmetric face-to-face dimers in which the CH(3)CH(2)Co(III)Pc units retain their sq…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsPorphyrin Metabolism and Disorders
Chengjun Duan、Xueyan Wu、Weifeng Li 等 6 位作者2005-11-10Applied Physics Letters
The sample of Eu2+-doped Ba3BP3O12 was prepared by a solid-state reaction at high temperature and was showed to be an excellent scintillator when excited with hard x ray s. The phosphor showed a broad emission band in the wavelength range of 400–650 nm and a comparable light yield with that of Bi4Ge3O12 powders. Its r…
Luminescence Properties of Advanced MaterialsRadiation Detection and Scintillator TechnologiesMicrowave Dielectric Ceramics Synthesis
Pia Deindörfer、Thomas Geiger、Dieter Schollmeyer 等 5 位作者2005-11-10Journal of Materials Chemistry
This paper describes the synthesis of 14 new gelling agents with semicarbazide groups as H-bonding motifs and alkyl- and/or azobenzene side groups. They gel solvents like decaline, 1,2-dichlorobenzene and toluene and liquid crystalline mixtures. X-Ray structure analysis shows that the semicarbazides are connected by H…
Liquid Crystal Research AdvancementsHydrogels: synthesis, properties, applicationsAdvanced Materials and Mechanics
Élise Berrier、Carine Zoller、Franck Béclin 等 6 位作者2005-11-10The Journal of Physical Chemistry B
Silica xerogels were synthesized and annealed at 1000 degrees C for different durations to yield stable silica materials. The samples were prepared through base-catalyzed hydrolysis and condensation of tetramethyl orthosilicate in methanol. After aging and drying steps, clear and solid xerogels exhibiting a narrow por…
Glass properties and applicationsMesoporous Materials and CatalysisAerogels and thermal insulation
P. Dobrzyński、Janusz Kasperczyk2005-11-10Journal of Polymer Science Part A Polymer Chemistry
Abstract The results of the copolymerization of glycolide with cyclic trimethylene carbonate and 2,2‐dimethyltrimethylene carbonate are described. The copolymerization was conducted in the presence of low‐toxicity zirconium(IV) acetylacetonate as an initiator. With this kind of initiator, the composition of the comono…
Organometallic Complex Synthesis and Catalysisbiodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysis
Manoj K. Kolel‐Veetil、Teddy M. Keller2005-11-10Journal of Polymer Science Part A Polymer Chemistry
Abstract The Karstedt catalyst‐catalyzed ambient‐condition hydrosilation reactions in hexane of a monomeric vinyl‐containing carboranylenesiloxane, 1 , and three‐branched siloxane crosslinker monomers were discovered to produce elastomeric network polymers at very rapid rates of formation. The flexible and transparent…
Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesSilicone and Siloxane Chemistry
Catalin Gainaru、A. Rivera、S Putselyk 等 5 位作者2005-11-10Physical Review B
The dielectric loss of molecular glasses was investigated from the glass transition temperature ${T}_{g}$ down to 2 K, for glycerol down to 0.1 K, in the frequency range 50 Hz--20 kHz. The systems studied here do not exhibit a $\ensuremath{\beta}$ process. Three distinct relaxation regimes are identified, namely nearl…
Material Dynamics and PropertiesIonic liquids properties and applicationsThermodynamic properties of mixtures
Alison M. Funston、James Kirby、John R. Miller 等 12 位作者2005-11-10The Journal of Physical Chemistry A
One-electron reduction of the "extended viologen" dication 1 yields the red cation radical 2, characterized by strong near-IR absorption. It has been generated and studied by pulse radiolytic, electrochemical, redox titration, UV-visible, and electron paramagnetic resonance spectroscopic methods. All results are in ag…
Organometallic Complex Synthesis and CatalysisPorphyrin and Phthalocyanine ChemistryOxidative Organic Chemistry Reactions
B. Hyde§、Diana Farkas、M.J. Caturla2005-11-10The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics
Atomistic computer simulations were performed to investigate the mechanisms of grain-boundary sliding in bcc Fe using molecular statics and molecular dynamics with embedded-atom method interatomic potentials. For this study we have chosen the Σ = 5, (310)[001] symmetrical tilt boundary with tilt angle θ = 36.9°. Slidi…
Microstructure and mechanical propertiesMicrostructure and Mechanical Properties of SteelsFusion materials and technologies
Viktor A. Podolskiy、Leonid Alekseyev、Evgenii E. Narimanov2005-11-10Journal of Modern Optics
We demonstrate that non-magnetic (μ≡1) left-handed materials can be effectively used for waveguide imaging systems. We also propose a specific THz realization of a non-magnetic left-handed material based on homogeneous, naturally occurring media.
Metamaterials and Metasurfaces ApplicationsOrbital Angular Momentum in OpticsTerahertz technology and applications
Dengguo Wu、Martin E. Kordesch、P. Gregory Van Patten2005-11-10Chemistry of Materials
A new method is described for the synthesis of high-quality CdSe nanocrystals (NCs) that eliminates the need for tri-octylphosphine oxide (TOPO). This new method is an adaptation of previously reported methods that use Cd salts as precursors for the CdSe NCs. High-boiling esters and ketones such as hexadecyl hexadecan…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanocluster Synthesis and Applications
Marc in het Panhuis、Raquel Sainz、Peter C. Innis 等 9 位作者2005-11-10The Journal of Physical Chemistry B
A completely soluble optically active polyaniline-multiwalled carbon nanotube composite was investigated by spectroscopic and microscopic techniques. It was found that the polymer's optical activity was retained in the presence of carbon nanotubes. Solutions were found to be easily processable into thin films, which e…
Carbon Nanotubes in CompositesConducting polymers and applicationsMechanical and Optical Resonators
Kazuki Kawahara、Yoshinori Nishi、Shota Nakamura 等 8 位作者2005-11-10Biochemistry
X-ray analysis has been carried out on a crystal of the collagen model peptide (Hyp(R)-Hyp(R)-Gly)10 [where Hyp(R) is 4(R)-hydroxyproline] with 1.5 A resolution. The triple-helical structure of (Hyp(R)-Hyp(R)-Gly)10 has the same helical parameters and Rich and Crick II hydrogen bond patterns as those of other collagen…
Chemical Synthesis and AnalysisEnzyme Production and CharacterizationCollagen: Extraction and Characterization
Michelle D. Lefebvre、Christine M. Dettmer、Rachel L. McSwain 等 8 位作者2005-11-10Macromolecules
Interfacial segregation of diblock, gradient, and random copolymers was measured using forward recoil spectrometry. The polymers were synthesized by a ring-opening metathesis polymerization, allowing a high degree of control over the sequence distribution. The norbornene-based monomers have reactivity ratios close to…
Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesBlock Copolymer Self-Assembly
Rong‐Tan Huang、Chen-Feng Hsu、Ji‐Jung Kai 等 5 位作者2005-11-10Applied Physics Letters
High concentration (5at.%) Ni was incorporated into a chemical vapor deposition-grown GaN film by using a thin protecting Ni layer on top of the GaN film during ion implantation. After etching off the protecting layer, subsequent annealing up to 800°C under flowing N2 resulted in a p-type GaN with apparent ferromagnet…
ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials
Asunción Luquín、Cándido Bariáin、Elena Vergara 等 7 位作者2005-11-10Applied Organometallic Chemistry
Abstract Complexes [Au 2 Ag 2 (C 6 F 5 ) 4 L 2 ] n , where L = 1,10‐phenanthroline (phen), 2,2′‐bipyridine (bipy) or tetrahydrothiophene (tht), have been synthesized by reaction of NBu 4 [Au(C 6 F 5 ) 2 ] with Ag(SO 3 CF 3 ), and the addition of phen or bipy thereafter, or with [Ag(SO 3 CF 3 )(tht)]. The organometalli…
Organic Light-Emitting Diodes ResearchPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
Kimberlee Fay Thompson、Stephen Michielsen2005-11-10Journal of Polymer Science Part A Polymer Chemistry
Abstract Poly(acrylic acid) (PAA) was derivatized through the reaction of its pendant carboxylic acid (CO 2 H) groups with a wide range of amine‐terminated molecules. These molecules contained alkyl, hydroxyl, sulfonic acid, or perfluoroalkyl groups. N‐substitution of PAA was carried out by the simple addition of 4‐(4…
Fluorine in Organic ChemistryLanthanide and Transition Metal ComplexesSynthesis and properties of polymers
Michael U. Kumke、Sascha Eidner、Tobias Krüger2005-11-10Environmental Science & Technology
Intrinsic fluorescence quenching of humic substances (HS) and the sensitization of Ln3+ luminescence (Ln3+ = Tb3+, Eu3+) in HS complexes were investigated. Both measurements yielded complementary information on the complexation of metals by HS. Large differences between fulvic acids (FA) and humic acids (HA) were foun…
Luminescence Properties of Advanced MaterialsRadioactive element chemistry and processingLanthanide and Transition Metal Complexes