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
C. Dendrinou-Samara、George Psomas、Lykourgos Iordanidis 等 5 位作者2001-12-03Chemistry - A European Journal
Interaction of manganese with salicylhydroxamic ligands leads to the formation of the 12-membered metallacrown [Mn(II)(2(2,4-DP)2(HCOO)2]-[12-MC(Mn(III)N(shi)-4](py)6 (2) (H-2,4-DP =2-(2,4-dichlorophenoxy)propionic acid) and the 15-membered metallacrown [Mn(II)(2,4-D)2][15-MC(Mn(III)N(shi)-5](py)6 (1) (H-2,4-D = 2,4-d…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Jun‐Ming Liu、Helen Lai Wah Chan、C. L. Choy 等 4 位作者2001-12-03Physical review. B, Condensed matter
We present a calculation of the magnetic hysteresis and its area for a model continuum spin system based on three-dimensional $({\ensuremath{\Phi}}^{2}{)}^{2}$ model with $O(N)$ symmetry in the limit $N\ensuremath{\rightarrow}\ensuremath{\infty},$ under a time-varying magnetic field. The frequency dependence of the hy…
Magnetic properties of thin filmsTheoretical and Computational PhysicsMagnetic Properties and Applications
Thierry Martin、Benoît Lefèvre、D. Brunel 等 9 位作者2001-12-03Chemical Communications
Texture-related features of water intrusion in hydrophobised MCM-41 silicas render these materials especially suitable for energy dissipation in mechanical dampers.
Mesoporous Materials and CatalysisAdvanced Materials and MechanicsAerogels and thermal insulation
A. K. Tagantsev、N.A. Pertsev、Paul Muralt 等 4 位作者2001-12-03Physical review. B, Condensed matter
It is shown that a strong but diffuse dielectric anomaly, commonly expected only in disordered ferroelectrics, may be inherent in strained and defect-free perovskite ferroelectric thin films. The origin of this unusual anomaly, which was never predicted for a defect-free system, is the overcritical trace of a critical…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Dieter Horn、Jens Rieger2001-12-03Angewandte Chemie
Viele organische Wirk- und Effektstoffe sind in Wasser schwer löslich oder sogar unlöslich. Wässrige Anwendungsformen erfordern daher besondere Formulierungsverfahren, um die physiologische (Pharma, Kosmetik, Pflanzenschutz, Ernährung) oder technologische Wirkung (Lacke, Druckfarben, Toner) nutzen zu können oder zu op…
Quantum Dots Synthesis And PropertiesAlgal biology and biofuel productionPolyoxometalates: Synthesis and Applications
I. I. Oleinik、Evgeny Y. Tsymbal、D. G. Pettifor2001-12-03Physical review. B, Condensed matter
First-principles density-functional calculations of the atomic and electronic structure of ${\mathrm{C}\mathrm{o}/\mathrm{S}\mathrm{r}\mathrm{T}\mathrm{i}\mathrm{O}}_{3}/\mathrm{Co}$ (001) magnetic tunnel junctions (MTJ's) are performed. Different interface terminations are considered and the most stable structure wit…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Jianzhuang Jiang、Yongzhong Bian、Fumio Furuya 等 10 位作者2001-12-03Chemistry - A European Journal
A series of 14 heteroleptic rare earth sandwich complexes [M(III)-(nc)(oep)] (M=Y, La-Lu except Ce and Pm; nc=2,3-naphthalocyaninate; oep = octaethylporphyrinate) have been prepared by a one-pot procedure from corresponding [M(acac)3] . nH2O (acac = acetylacetonate), metal-free porphyrin H2(oep), and naphthalonitrile…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Sergei I. Nikitenko、Yuri Koltypin、O. Palchik 等 6 位作者2001-12-03Angewandte Chemie International Edition
A coating of iron carbide and carbon confers air-stability on the nanocrystalline iron particles that were prepared by sonolysis of [Fe(CO)5] in diphenylmethane followed by annealing of the as-prepared material. The saturation magnetization of this material (222 emu g−1, see picture) is almost as high as that of bulk…
Diamond and Carbon-based Materials ResearchPower Transformer Diagnostics and InsulationPowder Metallurgy Techniques and Materials
Marcin Stępień、Lechosław Latos‐Grażyński2001-12-03Chemistry - A European Journal
6,11,16,21-Tetraphenylbenziporphyrin (TPBPH)H, an analogue of tetraphenylporphyrin with one of the pyrrole groups replaced by a benzene ring, is formed in good yield in the condensation of the appropriate precursor with pyrrole and benzaldehyde. (TPBPH)H gives organometallic complexes with palladium(II) and platinum(I…
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsMetal-Catalyzed Oxygenation Mechanisms