Materials Literature
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The solubility of naphthalene in isobutyl acetate, n -butyric acid (butanoic acid), ethyl acetate (ethyl ethanoate), N -methyl pyrrolidone (1-methyl-2-pyrrolidone), N, N -dimethylformamide ( N, N -dimethylmethanamide), tetrahydrofuran (oxacyclopentane), and acetone (propanone) between 278 K and 328 K was measured usin…
Abstract X‐ray diffraction measurements of Al 2 (WO 4 ) 3 were carried out under various temperatures from 123 K to 373 K. Diffraction patterns above 273 K and below 253 K could be successfully explained as orthorhombic Pbcn (No. 60) and monoclinic P2 1 /n (No. 14) with superstructure, respectively, which were in agre…
An array of supramolecular structures formed from N-lipidated peptides attached to cellulose via aminophenylamino-1,3,5-triazine was synthesized. The structures thus prepared were prone to self-organization and to formation of monolayer of "holes" and "pockets" in dynamic equilibrium, structures which were capable of…
A luminescent probe for integral membrane proteins (IMPs): Intermolecular sensitization of Tb luminescence is observed in micelles in which the polar head group of a Tb-containing lipid analogue is located close to an antenna chromophore, such as tryptophan, in a surfactant analogue that mimics interfacially bound try…
Three catabolic enzymes, UlaD, UlaE, and UlaF, are involved in a pathway leading to fermentation of l-ascorbate under anaerobic conditions. UlaD catalyzes a beta-keto acid decarboxylation reaction to produce L-xylulose-5-phosphate, which undergoes successive epimerization reactions with UlaE (L-xylulose-5-phosphate 3-…
Hier herrscht N-Fusion: Ein doppelt N-anelliertes Porphyrin (siehe Bild; Br rot, F grün, N blau) zeigt eine ausgesprochen langwellige Absorption (jenseits 1600 nm) für ein aromatisches 18π-System. Die HOMO-LUMO-Lücke der Titelverbindung ist für ein [18]Annulen-Derivat sehr klein, weil das Porphyrin-π-System endocyclis…
A novel mesoscopic simulation method is adopted to study the ordered packing of the anisotropic disklike particles with a soft repulsive interaction, which possesses a modified anisotropic conservative force type used in dissipative particle dynamics. We examine the influence of the shape of the particles, the angular…
The push-pull character of two series of donor-acceptor triazenes has been quantified by (13)C and (15)N chemical shift differences of the partial N(1)=N(2) and N(3)=C(4) double bonds in the central linking C=N-N=N-C unit and by the quotient of the occupations of both the bonding pi and antibonding orbitals pi* of the…
Nanometer-thick membranes of a large variety of silica-based double oxides commonly show gas-tightness (H2 and O2) and efficient proton conduction at 100–400 °C under dry atmosphere.
Abstract Measurements of reflection, emission‐excitation, luminescence decay kinetics, and X‐ray photoelectron of Bi 4 Ge 3 O 12 and Bi 12 GeO 20 crystals have been performed, in addition to relativistic molecular orbital calculations. Both materials consist of the same elements but form different crystal structures.…
Abstract Eine häufig zitierte Schwäche der Biokatalyse ist das Fehlen spiegelbildlicher Enzyme, um in asymmetrischen Synthesen jedes der beiden Enantiomere herstellen zu können. Als Lösung für dieses Problem hat die Natur enantiokomplementäre Enzyme entwickelt – also Enzympaare, die dieselben Reaktionen katalysieren,…
We have investigated the surface vibrational dynamics at the polymer-vacuum interface of atactic poly(methyl methacrylate) thin films supported on SiO(x)/Si(100) as a function of film thickness and molecular weight. The highly surface-sensitive and nondestructive technique of inelastic helium atom scattering probes th…
Abstract In this paper, we present processes to etch high thickness porous silicon layers for RF device applications. Indeed, on‐chip inductors realized on bulk silicon suffer from mediocre Q‐factor values mainly because of electrical losses into the substrate and capacitive coupling with the silicon appearing beyond…
We have recently designed a nanotrigger (NT), a photoactive molecule addressing the NADPH sites of proteins. This nanotrigger has a 10(3) times larger two-photon cross-section compared to the ubiquitous NADPH cofactor. In this work, we tested whether two-photon excitation of the bound NT to NADPH sites may be used to…
Multifunctional Langmuir-Blodgett (LB) films were fabricated on the surface of glass substrates using sol-gel derived ZnO and SiO2 particles. ZnO particles of 6 and 110 nm diameter were synthesized according to the methods of Meulenkamp and Seelig et al. (Meulenkamp, E. A. J. Phys. Chem. B 1998, 102, 5566; Seelig, E.…
Abstract Porous anodic alumina (PAA) thin films (thickness ∼ 50nm) were fabricated on Si by anodization of thin Al films under constant voltage of 20 V in sulphuric acid aqueous solution. The films exhibit cylindrical vertical pores of diameter ∼ 13–15 nm, arranged in hexagonal close packed structure. Electrochemical…
Self-assembly of AgNO 3 with the semirigid tetratopic ligands 1,2,4,5-tetrakis(benzoimidazol-1-ylmethyl)benzene (TBim) and 1,2,4,5-tetrakis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene (TDMBim) afforded compounds [Ag 4(mu 4-TBim) 2(mu 2-eta (2)-NO 3) 2](NO 3) 2. (1)/ 2CH 2Cl 2.2CH 3OH ( 1mu (1)/ 2CH 2Cl 2.2CH 3OH) and…
Abstract Multiferroic magnetoelectric PbTi 1– x Fe x O 3 compounds were prepared using a solid‐state reaction method in the composition range 0 ≤ x ≤ 0.15. The temperature dependence of lattice parameters of PbTi 1– x Fe x O 3 was determined from high‐temperature X‐ray diffraction. The average volumetric thermal expan…
Unusually accepting: A series of metalloporphyrin–ruthenocene complexes, synthesized by direct coordination of a [Ru(Cp*)]+ fragment to the π-electron “face” of several metallooctaethylporphyrins (see graphic), undergo efficient photoinduced electron transfer from the ruthenocene unit (acting as the electron donor) to…
Dynamische Beobachtung: Die schnelle oxidative Redispersion großer Pt-Nanopartikel auf einem Ceroxidträger in Abgaskatalysatoren bei Abwesenheit von Cl wurde durch eine In-situ-XANES-Analyse belegt. Ein Modell erklärt die beobachtete Redispersion mit dem Abfangen von Pt-Spezies an Positionen auf dem Certräger, die ein…