Montserrat Monfort、Inmaculada Resino、Joan Ribas 等 5 位作者2001-12-03New Journal of Chemistry
Seven new complexes of nickel(II), derived from azido, thiocyanato and nitrito bridging ligands and N,N,N′-trimethylethylenediamine (N,N,N′-Me3en) as blocking ligand, were synthesised and characterised; four of them are one-dimensional compounds: [Ni(μ1, 3-N3)(N,N,N′-Me3en)2]n(ClO4)n1, [Ni(μ1, 3-N3)(N,N,N′-Me3en)2]n(P…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
Paweł Uznański、Catherine Amiens、B. Donnadieu 等 5 位作者2001-12-03New Journal of Chemistry
Thermal oxidation of the zwitterionic form of two photochromic spirooxazines: 1,3-dihydro-1,3,3-trimethylspiro(2H-indole-2,3′-[3H]naphth[2,1-b]-[1,4]oxazine) (1) and 1,3-dihydro-1,3,3-trimethylspiro(2H-indole-2,3′-[3H]phenanthr[9,10-b]-[1,4]oxazine) (2) has been studied in the presence of silver ions in anaerobic cond…
Gold and Silver Nanoparticles Synthesis and ApplicationsPhotochromic and Fluorescence Chemistry
Sebastian Polarz、Bernd M. Smarsly、Lyudmila M. Bronstein 等 4 位作者2001-12-03Angewandte Chemie
Selbstorganisation in wässrigen Systemen indirekt untersucht: Die wässrige Phase wird durch einen Sol-Gel-Prozess auf Kieselgelbasis verfestigt, wobei das supramolekulare Aggregat 1:1 in der festen Kieselgelmatrix abgebildet wird. Am Modellsystem Cyclodextrine konnte gezeigt werden, dass die Cyclodextrinmoleküle „wurm…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisAerogels and thermal insulation
D. A. Ténné、A. M. Clark、A. R. James 等 5 位作者2001-12-03Applied Physics Letters
We have studied vibrational properties of Ba0.5Sr0.5TiO3 thin films grown by pulsed laser deposition on SrTiO3 and LaAlO3 substrates with SrRuO3 buffer layers by Raman spectroscopy over the temperature range from 5 to 300 K. The soft phonon modes were observed. The temperature dependence of the soft phonon frequency a…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectronic and Structural Properties of Oxides
Miguel Algueró、A. J. Bushby、Mike Reece 等 7 位作者2001-12-03Applied Physics Letters
Electrical depolarization has been observed in lanthanum-modified lead titanate ferroelectric thin films stressed by nanoindentation. A spherical metallic indenter was used as a top electrode to locally pole the films and then to measure the depolarization current intensity. The current intensity had distinctive maxim…
Ferroelectric and Piezoelectric MaterialsMetal and Thin Film MechanicsAcoustic Wave Resonator Technologies
Per Viklund、C. Svensson、S. Hull 等 6 位作者2001-12-03Chemistry - A European Journal
The series of isotypic compounds V8Ga41 --> V8Ga36.9Zn4.1 --> Cr8Ga29.5Zn11.2 --> Mn8Ga27.4Zn13.6 with the V8Ga41 structure type (space group R3, Z = 3) was prepared and structurally characterised by X-ray diffraction experiments (V8Ga41: a 13.9351(5), 14.8828(12); V8Ga36.9Zn4.1: a = 13.9244(7), c = 14.8660(9): Cr8Ga2…
Rare-earth and actinide compoundsQuasicrystal Structures and PropertiesInorganic Chemistry and Materials
Armin Sautter、Christoph Thalacker、Frank Würthner2001-12-03Angewandte Chemie
Fluoreszierende Flüssigkristalle: Wasserstoffbrücken zwischen Benzoesäuren und Azaaren-Rezeptorgruppen von Diazadibenzoperylen-Fluorophoren induzieren columnare flüssigkristalline Mesophasen, die stark fluoreszieren. Die Struktur eines auf diese Weise gebildeten mesogenen Übermoleküls ist im Vordergrund einer polarisa…
Liquid Crystal Research AdvancementsPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials
Jianming Zhu、H. X. Qin、Z. H. Bao 等 9 位作者2001-12-03Applied Physics Letters
Good ferroelectric properties have previously been reported for both the (1−x)SrBi2Ti2O9–xBi3TiNbO9 bulk ceramics and thin films. In this work, x-ray diffraction and Raman scattering were used to investigate the effect of the incorporation of Bi3TiNbO9 into SrBi2Ta2O9 bulk ceramics and thin films. A better crystalliza…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Yasuo Cho、Koya Ohara2001-12-03Applied Physics Letters
A higher-order nonlinear dielectric microscopy technique with higher lateral resolution than conventional nonlinear dielectric imaging is investigated. The proposed scheme involves the measurement of higher-order nonlinear dielectric constants, with sensitivity to the first 0.75 nm in depth for LiNbO3 substrate surfac…
Ferroelectric and Piezoelectric MaterialsForce Microscopy Techniques and ApplicationsAcoustic Wave Resonator Technologies
Ewa Pacholska、Lechosław Latos‐Grażyński、Z. Ciunik2001-12-03Angewandte Chemie International Edition
The flexible partially inverted structure of an 18-π-electron porphyrin-(1.1.1.1)-like framework is found for 21,23-ditelluraporphyrin (see structure). The dihedral angle between the plane of meso-carbon atoms and the inverted tellurophene plane in the solid state is 123.0(2)°, while in solution the porphyrin molecule…
Advanced Chemical Physics StudiesSupramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine Chemistry
Armin Sautter、Christoph Thalacker、Frank Würthner2001-12-03Angewandte Chemie International Edition
Fluorescent liquid crystals: Hydrogen bonding of benzoic acids to azaaromatic receptor groups of diazadibenzoperylene fluorophores induces columnar liquid crystalline mesophases which are highly fluorescent. The structure of a mesogenic supermolecule generated in this way is shown on a background of a polarizing micro…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern FormationMolecular spectroscopy and chirality
T. Meguro、Akira Hida、Mitsutoshi Suzuki 等 8 位作者2001-12-03Applied Physics Letters
The local modification of the electronic states of highly oriented pyrolytic graphite (HOPG) surfaces using highly charged ion (HCI) irradiation has been demonstrated as a promising technique in the design of nanoscale materials. The high potential energy of HCI and subsequent surface treatment by either electron inje…
Diamond and Carbon-based Materials ResearchIon-surface interactions and analysisIntegrated Circuits and Semiconductor Failure Analysis
Po‐Wen Chiu、Grace X. Gu、Guntae Kim 等 7 位作者2001-12-03Applied Physics Letters
Metallofullerene nanotube peapods were prepared by introducing Dy@C82 into the interior space of single-walled carbon nanotubes. Transport measurements show that the Dy@C82 molecules function as electron donors and transfer charge to the carbon nanotube host. The amount of charge transferred varies with the temperatur…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Frank A. Dunand、Rachel S. Dickins、David Parker 等 4 位作者2001-12-03Chemistry - A European Journal
1H NMR line-shape analysis and magnetisation-transfer experiments at variable temperature and pressure have been used to elucidate the solution dynamics of both M and m isomers of three [Eu(dota-tetraamide)(H2O)]3+ complexes. The direct 1H NMR observation of the bound water signal allows the water-exchange rates on ea…
Advanced MRI Techniques and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Natasza Sprutta、Lechosław Latos‐Grażyński2001-12-03Chemistry - A European Journal
The acid-catalyzed condensation of pyrrole and 2,5-bis(p-tolylhydroxymethyl)thiophene yields two novel giant heteroporphyrins: 5,10,15,20,25,30, 35,40-octa(p-tolyl)-41,43,45,47-tetrathia[36]octaphyrin(1.1.1.1.1.1.1.1) (S4OP) and 5,10,15,20,25,30,35,40-octa(p-tolyl)-dihydro-41,43,45,47-tetrathia[38]octaphyrin(1.1.1.1.1…
Molecular Sensors and Ion DetectionSupramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine Chemistry
Yang Rao、Jireh Yue、C.P. Wong2001-12-03Active and Passive Electronic Components
Embedded capacitor technology can improve electrical performance and reduce assembly cost compared with traditional discrete capacitor technology. Polymer–ceramic composites have been of great interest as embedded capacitor material because they combine the processability of polymers with the desired electrical proper…
Electromagnetic wave absorption materialsDielectric materials and actuatorsSynthesis and properties of polymers
Piétrick Hudhomme、S. Le Moustarder、Christophe Durand 等 10 位作者2001-12-03Chemistry - A European Journal
The synthesis and characterization of new modified tetrathiafulvalenes (TTF), the S-position isomers of BEDT-TTF and EDT-TTF, are described. The synthetic strategy presented in this work is based on an efficient and unprecedented two-step sequence for the conversion of a vicinal bis(hydroxymethyl) functionality into a…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchOrganometallic Compounds Synthesis and Characterization
Yu-Hui Tang、Peng Zhang、Peter Kim 等 11 位作者2001-12-03Applied Physics Letters
The structure and bonding of amorphous carbon nanowires and amorphous carbon nanowires-converted multiwalled carbon nanotubes have been investigated with carbon K-edge near-edge x-ray absorption fine structure using surface-sensitive total electron yield, and bulk-sensitive fluorescence yield. The results strongly sup…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchFullerene Chemistry and Applications
Sergei I. Nikitenko、Yuri Koltypin、O. Palchik 等 6 位作者2001-12-03Angewandte Chemie
Durch eine Eisencarbid- und Kohlenstoffhülle gegen Luftoxidation geschützt sind die nanokristallinen Eisenpartikel, die durch Sonolyse von [Fe(CO)5] in Diphenylmethan und Tempern des erhaltenen Materials hergestellt wurden. Die Sättigungsmagnetisierung des Materials (222 emu g−1, siehe Bild) ist fast so hoch wie die v…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchLaser-Ablation Synthesis of Nanoparticles
Samuel A. French、Alexey A. Sokol、Stefan T. Bromley 等 7 位作者2001-12-03Angewandte Chemie
Struktur und Energetik der Schlüsselintermediate bei der katalytischen Umwandlung von CO2 zu Methanol (siehe Bild) wurden untersucht. Die Polarität der für die Katalyse relevanten (000)-Oberfläche von ZnO führt zu unbesetzten Sauerstoffpositionen, die als Elektronenfallen die Reaktion vorantreiben. Die entwickelte Fes…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysts for Methane Reforming