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Perfluoroarylation of Iron(II) Di‐ and Hexaiodoclathrochelates – Synthesis, X‐ray Structure, and Properties of the First Cage Complexes with Inherent Pentafluorophenyl Substituent(s)

Оleg А. Varzatskii、Irina N. Denisenko、С. В. Волков 等 9 位作者2013-05-15European Journal of Inorganic Chemistry

Abstract Perfluoroarylation of a known iron(II) diiodoclathrochelate precursor and its new n ‐butylboron‐capped hexaiodomacrobicyclic analog with pentafluorophenylcopper(I) gave the first iron(II) cage complexes with inherent perfluoroaryl substituent(s). The complexes synthesized were characterized by elemental analy…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesMetalloenzymes and iron-sulfur proteins

A Novel Method for Designing Electromagnetic Shrinking Device With Homogeneous Material Parameters

Tinghua Li、Ming Huang、Jingjing Yang 等 5 位作者2013-05-15IEEE Transactions on Magnetics

A shrinking device is an intriguing illusion device that can convert an arbitrary object virtually into a desired small-size object. By performing linear transformation along the orthogonal direction, two-dimensional and three-dimensional electromagnetic shrinking devices with anisotropic homogeneous material paramete…

Antenna Design and AnalysisMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface Technologies

Thermal and optical properties of glass and crystalline phases formed in the binary R2O3-Al2O3 (R = La-Lu and Y) system

Malahalli Vijaya Kumar、Takehiko Ishikawa、B. Basavalingu 等 5 位作者2013-05-15Journal of Applied Physics

Rare-earth aluminate (RAlO3, R = La–Lu and Y) glass and crystalline phases were prepared by containerless levitation in an aerodynamic levitation furnace. In the RAlO3 system, La, Nd and Sm aluminum perovskites solidified as glass and Eu–Lu and Y aluminum perovskites solidified as crystalline phases. The glass forming…

Luminescence Properties of Advanced MaterialsGlass properties and applicationsMicrowave Dielectric Ceramics Synthesis

The electrochemical hydrogen storage characteristics of as‐spun nanocrystalline and amorphous Mg 20 Ni 10− x M x (M=Cu, Co, Mn; x = 0–4) alloys

Yanghuan Zhang、Tai Yang、Hongwei Shang 等 6 位作者2013-05-15Rare Metals

Abstract In this paper, we comprehensively investigate the influences of M (M=Cu, Co, Mn) substitution for Ni on the structures and electrochemical hydrogen storage characteristics of the nanocrystalline and amorphous Mg 20 Ni 10− x M x (M=Cu, Co, Mn; x = 0–4) alloys prepared by melt spinning. The as‐spun (M=None, Cu)…

Hydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen ReductionNanomaterials for catalytic reactions

n-Butane Isomerization over Silica-Supported Heteropolyacids: Study of Some Parameters

Éva Grinenval、Anthony Garron、F. Lefèbvre2013-05-15Journal of Catalysts

Isomerization of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>n</mml:mi></mml:mrow></mml:math>-butane was studied on silica-supported heteropolyacids. The activity depends strongly on the solvent used for the preparation and on the polyoxometalate loading. This behavior was explai…

Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions

Exploring the Segregating and Mineralization-Inducing Capacities of Cationic Hydrophilic Polymers for Preparation of Robust, Multifunctional Mesoporous Hybrid Microcapsules

Jiafu Shi、Wen‐Yan Zhang、Xiaoli Wang 等 9 位作者2013-05-15ACS Applied Materials & Interfaces

A facile approach to preparing mesoporous hybrid microcapsules is developed by exploring the segregating and mineralization-inducing capacities of cationic hydrophilic polymer. The preparation process contains four steps: segregation of cationic hydrophilic polymer during template formation, cross-linking of the segre…

Electrospun Nanofibers in Biomedical ApplicationsMesoporous Materials and CatalysisPolymer Surface Interaction Studies

Characterization, prediction, and optimization of flexural properties of vapor‐grown carbon nanofiber/vinyl ester nanocomposites by response surface modeling

Juhyeong Lee、Sasan Nouranian、Glenn W. Torres 等 7 位作者2013-05-15Journal of Applied Polymer Science

ABSTRACT A design of experiments and response surface modeling were performed to investigate the effects of formulation and processing factors on the flexural moduli and strengths of vapor‐grown carbon nanofiber (VGCNF)/vinyl ester (VE) nanocomposites. VGCNF type (pristine, surface‐oxidized), use of a dispersing agent…

Carbon Nanotubes in CompositesMechanical Behavior of CompositesFiber-reinforced polymer composites

Energetics and Electronic Structure of Encapsulated Graphene Nanoribbons in Carbon Nanotube

Bikash Mandal、Sunandan Sarkar、Pranab Sarkar2013-05-15The Journal of Physical Chemistry A

We report results of our total energy electronic structure calculation of encapsulation of graphene nanoribbon (GNR) in the carbon nanotube (CNT). The encapsulation of both coronene and perylene based graphene nanoribbons in zigzag (n,0) carbon nanotubes (where n ranges from 14 to 18 for perylene based nanoribbon and…

Advancements in Battery MaterialsCarbon Nanotubes in CompositesGraphene research and applications

Ultrafast Excited-State Dynamics of ortho-Terphenyl and 1,2-Diphenylcyclohexene: The Role of “Ethylenic Twisting” in the Nonadiabatic Photocyclization of Stilbene Analogs

Molly C. Smith、Joshua A. Snyder、Benjamin C. Streifel 等 4 位作者2013-05-15The Journal of Physical Chemistry Letters

Nonadiabatic photocyclization is the fundamental step underlying photoswitching and light-assisted bond formation within diarylethylenes, yet the details of the nuclear dynamics leading to cyclization remain unclear. We have examined the ultrafast excited-state dynamics of o-terphenyl (OTP) and 1,2-diphenylcyclohexene…

Photochemistry and Electron Transfer StudiesPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research

The Crystal Structure of Mycobacterium tuberculosis NrdH at 0.87 Å Suggests a Possible Mode of Its Activity

Swastik Phulera、Shekhar C. Mande2013-05-15Biochemistry

Members of the NrdH family of redox proteins, which consists of small glutaredoxin-like proteins with thioredoxin-like activity, serve as the reducing partners of class Ib ribonucleotide reductases. Here, we report the crystal structure of NrdH from Mycobacterium tuberculosis, refined to a crystallographic R factor of…

Enzyme Structure and FunctionMetal-Catalyzed Oxygenation MechanismsRedox biology and oxidative stress

Structural and vibrational stability of M and Z phases of silicon and germanium from first principles

A. Bautista Hernández、Tonatiuh Rangel、A. Romero 等 6 位作者2013-05-15Journal of Applied Physics

First-principles calculations were performed to investigate the structural feasibility of M and Z phases (novel monoclinic and orthorhombic structures recently reported for carbon) for silicon and germanium. The lattice parameters, bulk modulus, vibrational properties, and elastic constants are calculated using the lo…

Graphene research and applicationsBoron and Carbon Nanomaterials ResearchSemiconductor materials and interfaces

In Situ Synthesis of High Density sub-50 nm ZnO Nanopatterned Arrays Using Diblock Copolymer Templates

Vignesh Suresh、Meiyu Stella Huang、Madhavi Srinivasan 等 4 位作者2013-05-15ACS Applied Materials & Interfaces

Fabrication of high density (~155 Gbit in(-2)) ZnO nanopatterns through in situ decomposition of Zn precursors inside diblock copolymer templates and their application as charge storage centers in nonvolatile memory devices is described. The fabrication is performed in a highly controlled fashion with the resulting Zn…

ZnO doping and propertiesSemiconductor materials and devicesAnodic Oxide Films and Nanostructures

Photoconductive logic gate based on platinum decorated carbon nanotubes

C. Mercado-Zúñiga、Jorge Roberto Vargas-García、Felipe Cervantes‐Sodi 等 6 位作者2013-05-15Applied Optics

Electrical and nonlinear optical experiments were performed on multiwall carbon nanotubes (CNTs) prepared by a chemical vapor deposition method. We report that the incorporation of platinum particles on the CNTs surface originates an enhancement in the photoconductive properties with noticeable capabilities to modulat…

Carbon Nanotubes in CompositesPhotonic and Optical DevicesMechanical and Optical Resonators

Growth of fcc(111) Dy multi-height islands on 6H-SiC(0001) graphene

Matthew Hershberger、M. Hupalo、P. A. Thiel 等 4 位作者2013-05-15Journal of Physics Condensed Matter

Graphene based spintronic devices require an understanding of the growth of magnetic metals. Rare earth metals have large bulk magnetic moments so they are good candidates for such applications, and it is important to identify their growth mode. Dysprosium was deposited on epitaxial graphene, prepared by thermally ann…

Graphene research and applicationsSilicon Carbide Semiconductor TechnologiesDiamond and Carbon-based Materials Research

Detection of the corrosion degree of beverage cans using a novel electrochemical sensor

Xin Zheng、Da‐Hai Xia、Huihui Wang 等 4 位作者2013-05-15Anti-Corrosion Methods and Materials

Purpose The purpose of this paper is to report a novel electrochemical sensor designed to detect the corrosion of metal cans used for beverage packaging. Design/methodology/approach Electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) were performed to detect the corrosion degree of beverage can…

Corrosion Behavior and InhibitionElectrochemical Analysis and ApplicationsMaterial Properties and Processing

Influence of Mo alloying on pitting corrosion of stainless steels used as concrete reinforcement

Thiago J. Mesquita、Éric Chauveau、Marc Mantel 等 5 位作者2013-05-15REM - International Engineering Journal

Corrosion of reinforcement steels, induced by chloride ions penetrating into the concrete, is the main cause of early damage, loss of serviceability and safety of reinforced concrete structures, which can be even more severe in the presence of concomitant concrete carbonation. In order to prevent reinforcement steel c…

Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability

New Polar Phases of 1,4-Diazabicyclo[2.2.2]octane Perchlorate, An NH+···N Hydrogen-Bonded Ferroelectric

Anna Olejniczak、Michalina Anioła、Marek Szafrański 等 5 位作者2013-05-15Crystal Growth & Design

Exceptionally rich diagram of ten phases, I–X, has been revealed for ferroelectric 1,4-diazabicyclo[2.2.2]octane perchlorate, [C 6 H 13 N 2 ] + ClO 4 –, dabcoHClO 4 . Pressure- and temperature-induced transformations of this NH + ···N hydrogen bonded structure have been characterized by single-crystal X-ray diffractio…

Crystallography and molecular interactionsNonlinear Optical Materials ResearchSolid-state spectroscopy and crystallography

Transient Photoconductivity of Ternary CdSSe Nanobelts As Measured by Time-Resolved Terahertz Spectroscopy

Junpeng Lü、Hong Wei Liu、Sharon Xiaodai Lim 等 6 位作者2013-05-15The Journal of Physical Chemistry C

The frequency- and fluence-dependent transient photoconductivity in ternary CdSSe nanobelts is investigated using time-resolved terahertz spectroscopy. The carrier density and mobility are extracted by modeling the measured complex photoconductivity using the Drude–Smith model. Within the first few picoseconds of exci…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanowire Synthesis and Applications

Electroluminescence from Metal Oxide Thin Films

Yue Kuo、Chun‐Chieh Lin2013-05-15ECS Solid State Letters

Light emission from the amorphous Zr-doped HfO 2 high- k dielectric deposited by the sputtering method has been studied. The broad band light including visible and near IR wavelengths was emitted from tiny conductive paths formed after the dielectric breakdown. Light is generated from thermal excitation not the electr…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsSemiconductor materials and devices

The electrochemical hydrogen storage performances of Si‐added La–Mg–Ni–Co‐based A 2 B 7 ‐type electrode alloys

Yanghuan Zhang、Li-Cui Chen、Tai Yang 等 6 位作者2013-05-15Rare Metals

Abstract In order to improve the electrochemical cycle stability of the RE–Mg–Ni‐based A 2 B 7 ‐type electrode alloys, a small amount of Si has been added into the alloys. The casting and annealing technologies were adopted to fabricate the La 0.8 Mg 0.2 Ni 3.3 Co 0.2 Si x ( x = 0–0.2) electrode alloys. The impacts of…

Hydrogen Storage and MaterialsHybrid Renewable Energy SystemsAmmonia Synthesis and Nitrogen Reduction