Materials Literature
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The neutral complex Zn(L*)(2) and its monocationic analogue [ZnL(L*).THF](1+) have been previously reported to contain two and one monoanionic alpha-iminopyridinate((1-)) pi radical ligands, respectively [Lu, C.C.; Bill, E.; Weyhermüller, T.; Bothe, E.; Wieghardt, K. J. Am. Chem. Soc. 2008, 130, 3181-3197] (L represen…
Sonochemical degradation of anion surfactants, such as p -octylbenzene sulfonate (LAS C 8 ), p -nonylbenzene sulfonate (LAS C 9 ), and p -dodecylbenzene sulfonate (LAS C 12 ), was performed to obtain detailed information on the interfacial region of cavitation bubbles, because LASs are decomposed mainly in this region…
Abstract A series of fluoropolymer films were synthesized by reacting several bisphenol monomers with 1,3‐bis(1,1,1,3,3,3‐hexafluoro‐2‐pentafluorophenyl methoxy‐2‐propyl)benzene via a nucleophilic aromatic substitution to form polyethers. The bisphenols used included two diphenol‐substituted spirodilactams (SDL; aliph…
Abstract A series of polyurethane‐ block ‐poly(trifluoropropylmethyl)siloxane (PUFS) elastomers were prepared via a two‐step process from toluenediisocyanate (TDI), α ω ‐bis(3‐aminopropyldiethoxylsilane) poly(trifluoropropylmethyl)siloxane (APFS), and poly(tetramethylene oxide) (PTMO). The PUFS films were formed throu…
Abstract In this paper, relationships between the scattering domain parameters (size and shape) and the light‐shielding properties of thermotropic systems with fixed domains (TSFD) are established. Specific focus is given to the effect of additive type on the formation of scattering domain size. Various functional lay…
Abstract Fulleren‐Flocken : Ein Fullerenderivat mit Diacetylen‐Funktionen ordnet sich in flockenförmigen Mikropartikeln an (siehe Bild). Sowohl die Diacetylen‐ als auch die C 60 ‐Einheiten können effektiv vernetzt werden. Dabei entstehen supramolekulare Materialien, die gegen Lösungsmittel, Hitze und mechanische Belas…
Die Autoren dieser Zuschrift haben kürzlich einen Fehler bei der Berechnung der Energiedichten für HPGC-Materialien in organischen Elektrolyten entdeckt. Eine korrigierte Version von Abbildung 3 c, die zusätzlich das Leistungs-Energiedichte-Verhältnis für das HPGC-Material in einer ionischen Flüssigkeit (BMImBF4) zeig…
Abstract Katalysator unter der Lupe : Die Untersuchung der Reduktion an einem Fischer‐Tropsch‐Katalysatorpartikel mithilfe von In‐situ‐Röntgentransmissionsmikroskopie im Rastermodus zeigte bei einer räumlichen Auflösung von 35 nm eine ungleichmäßige Verteilung von Fe 0 ‐, Fe 2+ ‐ und Fe 3+ ‐Spezies. Regionen mit unter…
Zinc oxide (ZnO)/amorphous carbon (a-C) core−shell nanowires have been prepared by sequential thermal evaporation and plasma deposition processes. The core−shell nanowires are composed of single-crystalline ZnO nanowire cores and uniformly coated a-C shells. This approach enables us to control the thickness of the a-C…
Polyolefin Fibres: Structure, Properties and Industrial Applications, Second Edition, explores one of the most widely used commercial polymers. These versatile fibers are durable, chemically resistant, lightweight, economical and functional. Polyolefin Fibers provides a comprehensive review of the structure and proper…
Abstract Reversible Strukturbildung : Stabile funktionelle Emulsionsmikrotröpfchen bauen verschiedene komplexe makroskopische Flüssigkeitsstrukturen auf (siehe Bild). Der hierarchische Organisationsprozess wird durch Wechselwirkungen zwischen Polymertensiden auf der Tröpfchenoberfläche vermittelt. Weil die Wechselwirk…
This article reviews overlap population (OP) diagrams for electron energy loss near-edge structure (ELNES) and x-ray absorption near-edge structure (XANES). By using the OP diagrams, peaks in ELNES and XANES of MgO, ZnO, AlN, GaN, InN, and YBa(2)Cu(3)O(7-x) are interpreted in terms of cation-anion and cation-cation in…
The electronic structure and the corresponding B K and N K near-edge x-ray fine structure (NEXAFS) spectra of epitaxially grown h-BN on Ni(111), Pt(111), and Rh(111) surfaces are investigated by density functional theory. The calculations are carried out using the WIEN2k program package applying the augmented-plane-wa…
This paper concerns the experimental observation of dispersion tuning ligand-free ZnO quantum dots down to the single-particle level, in polymer matrices, through the use of exfoliated ZrP nanoplatelets. High-resolution transmission electron microscopy and optical transmission spectroscopy reveal that the degree of di…
Here we report novel phase-separation behavior accompanying mechanical fracture ("fracture phase separation"), which is observed in polymer solutions. Surprisingly, mechanical fracture becomes a dominant coarsening process of the phase separation. The transition from viscoelastic to fracture phase separation correspon…
Abstract The plasma‐assisted improvement of wettability and flowability of fine powders is described. The plasma down‐stream reactor designed for an adequate treatment of particulates allows efficient surface modification and functionalization of particulates. It is discussed that the resulting rapidity of the process…
Artificial biolumiscence: The use of a supramolecular hydrogel to confine heme proteins and luminol can enhance the quantum yield of chemiluminescence (CL) by about an order of magnitude and give an emission time 4-6 times longer.Confining heme proteins and luminol with the nanofibers of self-assembled molecules was s…
The synthesis of cubic Pm3n mesocaged solid templated by cetyltrimethyl ammonium bromide (C16TMABr) surfactant by direct cocondensation of (3-aminopropyl)triethoxysilanes (APES) under strong alkaline conditions is reported. The novel route gives direct incorporation of amino functional groups on the porous silica wall…
Abstract Bunte Cluster : Die optischen Absorptions‐ und Emissionsbanden von Silbernanoclustern aus nur ein paar Atomen reagieren sehr empfindlich auf die chemische Umgebung, d. h., die Cluster sind ausgesprochen solvatochrom (siehe Bild). Mit ihren photophysikalischen Eigenschaften und ihrer Elektrochemilumineszenz ha…
By controlling the growth kinetics, we succeeded in growing wurtzite-twinning-induced three-dimensional (3D) alloyed ternary ZnSexS1-x nanoarchitectures with controlled morphologies and chemical composition via a vapor-solid (VS) process. The lattice constants of the alloyed ZnSexS1-x are linearly dependent on the che…