Fatma Bannani、René Thouvenot、Mongi Debbabi2007-07-24European Journal of Inorganic Chemistry
Abstract Reactions of ( n Bu 4 N) 4 [(NbW 5 O 18 ) 2 O] with trialkyl/arylsilanols in dichloromethane and/or acetonitrile forms respectively ( n Bu 4 N) 2 [NbW 5 O 19 SiRR′ 2 ] [R = R′ = Et ( 1 ), i Pr ( 3 ), O t Bu ( 4 ), Ph ( 5 ); R = t Bu and R′ = Me ( 2 )] in ca. 90–64 % isolated yields. The compounds have been ch…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Zhao‐Hui Zhou、Yuanfu Deng、Qiong-Xin Liu 等 6 位作者2007-07-24Inorganic Chemistry
Ethylenediaminetetraacetate is converted into its triacetate by peroxotitanate(IV), and strong chelation of the triacetate ligand to the metal center facilitates elimination of the pendant acetoxylate group. Various species of peroxotitanium(IV) complexes in the reaction sequence are fully characterized.
Polyoxometalates: Synthesis and ApplicationsChemical Synthesis and ReactionsChemical Synthesis and Characterization
Tymish Y. Ohulchanskyy、Michael K. Gannon、Mao Ye 等 7 位作者2007-07-24The Journal of Physical Chemistry B
2,4-Bis(4-dimethylaminophenyl)-6-alkylthiopyrylium and selenopyrylium dyes are essentially nonfluorescent (phi F < 0.001) and are poor generators of singlet oxygen in aqueous solution. However, upon complexation to calf thymus DNA, quantum yields for both fluorescence and generation of singlet oxygen increased dramati…
Advanced Photocatalysis TechniquesPorphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research Studies
Zhi Zheng、Baojun Huang、Ma Huiqiang 等 8 位作者2007-07-24Crystal Growth & Design
Biomorphic CaCO 3 with different hierarchically ordered micro- and nanostructures was fabricated with natural cellulose substances as the host templates. The fabrication involves two mild sonication processes in which calcium and carbonate ions are sequentially added to the template, together with subsequent calcinati…
Calcium Carbonate Crystallization and InhibitionBuilding materials and conservationDiatoms and Algae Research
Yoshiyuki Nonoguchi、Takuya Nakashima、Tsuyoshi Kawai2007-07-24The Journal of Physical Chemistry C
Size- and temperature-dependence of photoluminescence from CdTe nanocrystals has been studied in a room-temperature ionic liquid. With temperature decreasing from room temperature to 14 K, the photoluminescence intensity increases considerably and the emission quantum yield reaches almost 0.95 below 100 K. The emissio…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsElectronic and Structural Properties of Oxides
Tsang‐Tse Fang、Weijie Lin、Chia-Ying Lin2007-07-24Physical Review B
The temperature and frequency dependences of the dielectric responses and the complex impedance spectra of polycrystalline $\mathrm{Ca}{\mathrm{Cu}}_{3}{\mathrm{Ti}}_{4}{\mathrm{O}}_{12}$ (CCTO) doped with $\mathrm{Ca}\mathrm{Si}{\mathrm{O}}_{3}$ have been investigated. The dielectric responses show two Maxwell-Wagner…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisDielectric properties of ceramics
Yung‐Pin Huang、Teng-Ko Chen、Jingwen Tang 等 5 位作者2007-07-24Industrial & Engineering Chemistry Research
Poly(ethylene terephthalate) (PET) was incorporated with different amounts of TiO 2 nanoparticle and then spun into fibers of different diameters. Surface properties of these modified fibers were investigated by friction force, scanning electron microscopy, energy dispersive X-ray analysis, and electron spectroscopy f…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsTextile materials and evaluations
Jyh-Shyong Chang、Yuan-Ping Lee、Rong‐Chi Wang2007-07-24Industrial & Engineering Chemistry Research
Highly dispersed silver nanoparticles could be used as catalysts, as staining pigments for glasses and ceramics, as antimicrobial materials, in surface-enhanced Raman spectroscopy, as transparent conductive coatings, in electronics, etc. Consequently, the versatility of such particles provides strong incentives to the…
Gold and Silver Nanoparticles Synthesis and ApplicationsCatalytic Processes in Materials ScienceNanomaterials for catalytic reactions
Mimoun Hamma、R. P. Miranda、M. I. Vasilevskiy 等 4 位作者2007-07-24Journal of Physics Condensed Matter
An accurate calculation of the exciton–phonon interaction matrix elements and Huang–Rhys parameter for nearly spherical nanocrystals (NCs) of polar semiconductor materials is presented. The theoretical approach is based on a continuum lattice dynamics model and the effective mass approximation for electronic states in…
Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Ekaterina М. Zueva、Serguei A. Borshch、Мaria М. Petrova 等 5 位作者2007-07-24European Journal of Inorganic Chemistry
Abstract The electronic structure and magnetic properties of the recently synthesized V IV /V V mixed‐valence alkoxo‐polyoxovanadate comprising a hexanuclear vanadium core with four unpaired electrons have been studied within the DFT framework. The results of calculations suggest that the d electrons are completely tr…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesPolyoxometalates: Synthesis and Applications
S. Chatterjee、S. Giri、S. Majumdar 等 6 位作者2007-07-24Journal of Physics Condensed Matter
We present here a detailed investigation of the magnetic and structural behaviours of a ferromagnetic shape memory alloy with nominal composition Ni 2 Mn 1.44 Sb 0.6 . The alloy undergoes a structural transition from a high-temperature cubic phase ( ) to an orthorhombic low-temperature phase below approximately 200 K.…
Magnetic and transport properties of perovskites and related materialsShape Memory Alloy Transformations
Irawati Kandela、Reiner Bleher、Ralph M. Albrecht2007-07-24Journal of Histochemistry & Cytochemistry
Multiple correlative immunolabeling permits colocalization of molecular species for sequential observation of the same sample in light microscopy (LM) and electron microscopy (EM). This technique allows rapid evaluation of labeling via LM, prior to subsequent time-consuming preparation and observation with transmissio…
Advanced biosensing and bioanalysis techniquesQuantum Dots Synthesis And PropertiesElectrochemical Analysis and Applications
Haipeng Song、J. C. Kim、Ji Hoon Hong 等 9 位作者2007-07-24Advanced Functional Materials
Abstract The fabrication of transparent, flexible, and optically homogeneous magnetic composites containing ferrite (Fe 3 O 4 ) nanoparticles, liquid crystals (LCs), and siloxane backbones is reported. The transparent magnets are achieved by covalently bonding LCs to the siloxane backbones and then linking them to dop…
Liquid Crystal Research AdvancementsAdvanced Materials and MechanicsCharacterization and Applications of Magnetic Nanoparticles
Cristina E. Giusca、Yann Tison、S. Ravi P. Silva2007-07-24Physical Review B
The electronic behavior of a radially collapsed armchair carbon nanotube encountered by scanning tunneling microscopy experiments is presented in a study that probes the electronic changes directly associated with the atomically resolved structural perturbations. The finite density of states obtained through scanning…
Carbon Nanotubes in CompositesGraphene research and applicationsForce Microscopy Techniques and Applications
Silvia Alías、Raquel Andreu、María‐Jesús Blesa 等 10 位作者2007-07-24The Journal of Organic Chemistry
Polyenic nonlinear optic (NLO)-phores with a proaromatic 1,4-dithiafulvene electron donor and the little explored 1,1,3-tricyano-2-phenylpropene acceptor have been synthesized. Their configurational and conformational features, ground state polarization, and linear and nonlinear optical properties have been determined…
Nonlinear Optical Materials ResearchSynthesis and Properties of Aromatic CompoundsOrganic and Molecular Conductors Research
Andreas Kaltzoglou、Stephan D. Hoffmann、Thomas F. Fässler2007-07-24European Journal of Inorganic Chemistry
Abstract The clathrate compound α‐Cs 8 Sn 44 □ 2 has been synthesized from its elements under inert gas conditions and has been characterized by single‐crystal and powder X‐ray diffraction. At room temperature, it crystallizes with cubic symmetry [ a = 24.256(3) Å, space group Ia $\bar {3}$ d , Z = 8] and adopts a 2 ×…
Advanced Thermoelectric Materials and DevicesCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Teodor Silviu Balaban、Nina Berova、Charles Michael Drain 等 14 位作者2007-07-24Chemistry - A European Journal
A number of new porphyrins equipped with complementary triple hydrogen-bonding groups were synthesized in good yields. Self-assembly was investigated by NMR spectroscopy, dynamic light scattering (DLS), and atomic force microscopy (AFM). These artificial antenna systems were further characterized by stationary and tim…
Porphyrin and Phthalocyanine ChemistrySupramolecular Self-Assembly in MaterialsPhotochromic and Fluorescence Chemistry
Ravi K. Komanduri、W. Michael Jones、Chulwoo Oh 等 4 位作者2007-07-24Journal of the Society for Information Display
Abstract— Progress in the use of liquid‐crystal polarization grating (LCPG) to modulate unpolarized (and polarized) light with a grating period as small as 6.3 μm is reported. Similar to LCPGs formed at larger periods (11 μm) reported previously, polarization‐independent switching, predominantly three diffraction orde…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsOptical Coatings and Gratings
Annika Arndt、Mathias S. Wickleder2007-07-24European Journal of Inorganic Chemistry
Abstract Depending on the reaction conditions, the reaction of elemental palladium with H 2 SeO 4 in sealed glass tubes at 350 °C leads to red single crystals of Pd(SeO 3 ) [ C 2/ m , Z = 4, a = 6.788(2), b = 7.030(2), c = 7.008(2) Å, β = 118.09(3)°] or to yellow‐orange single crystals of Pd(SeO 4 ) [ C 2/ c , Z = 4,…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsCrystal Structures and Properties
Sang-Min Park、Prabu Ravindran、Young‐Hye La 等 6 位作者2007-07-24Langmuir
Directed assembly of fine-scale, very complex patterns with a variety of features, including terminations, jogs, disclinations, acute and obtuse bends, and sharp radii of curvature, was achieved with a symmetric poly(styrene-block-methylmethacrylate) (PS-b-PMMA) copolymer. The complex pattern was generated spontaneous…
Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyMachine Learning in Materials Science