Materials Literature
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This work deals with the production of zirconium diboride (ZrB 2 )‐based ultra‐high‐temperature ceramic porous bodies using different forming techniques with the aim to obtain a reduction in weight of the final components, to balance the high specific mass of ZrB 2 , useful especially in aerospace applications. A feas…
Abstract meso-Trifluoromethyl-substituted subporphyrin was obtained through an extrusion reaction from meso-trifluoromethyl-substituted heptaphyrin(1.1.1.1.1.1.1) upon combined metallation of Cu(II) and B(III) ions. The subporphyrin exhibited the most blue-shifted Soret-like absorption band among those ever prepared.
The complex OsH(2)Cl(2)(P(i)Pr(3))(2) reacts with pinacolborane, Me(2)NH-BH(3), and (t)BuNH(2)-BH(3) to give the complexes OsH(2)Cl{eta(2)-HBOC(CH(3))(2)C(CH(3))(2)OBpin}(P(i)Pr(3))(2) and OsH(2)Cl(eta(2)-HBNR(1)R(2))(P(i)Pr(3))(2) (R(1) = R(2) = Me; R(1) = H, R(2) = (t)Bu) containing monosubstituted alkoxy- and amido…
Eine große Kapazität für Wasserstoff zeichnet Li-dotierte konjugierte mikroporöse Polymere (CMP) aus. Die isostere Enthalpie der Wasserstoffadsorption in diesen Materialien beträgt bis zu 8.1 kJ mol−1, und bei 77 K und einem Druck von 0.1 MPa (1 bar) wurden 6.1 Gew.-% Wasserstoff adsorbiert.
Abstract Two Cs2(IO3)(I3O8) polymorph phases and the Rb2(I3O8)(IO3)(HIO3)2(H2O) compound were prepared by hydrothermal syntheses and characterised by X‐ray single crystal diffraction.α‐Cs2(IO3)(I3O8) crystallises in the hexagonal space groupP63(a= 7.366(1) Å;c= 13.883(1) Å;V= 652.3(1) Å3;Z′ = 2) whereasβ‐Cs2(IO3)(I3O8…
We report the synergistic and competitive interactions between multiple plasticizers in plasticized low-amylose starch that result in either enhanced or reduced water migration fluxes and effective moisture diffusivities. The starch was plasticized using glycerol and xylitol either individually or in 1:1 combination.…
The intercalation behavior of layered alpha-phase vanadyl phosphate, alpha-VOPO(4).2H(2)O (alpha-VP), with alkylamine was investigated by (51)V solid-state NMR in combination with powder XRD. The XRD results show that the amines form bimolecular layers upon intercalation. For the intercalation with short chain amines…
Abstract The new hydroxyl barium borate BaB 8 O 11 (OH) 4 was synthesized by using a low‐temperature molten salt technique with boric acid as flux at 458 K. Its crystal structure was determined from single‐crystal X‐ray data. The compound crystallizes in the monoclinic space group P 12 1 / n 1 (No.14) with unit cell o…
Abstract New lanthanide salicylaldimine complexes of the formula [Ln(H2L)3(NO3)3](H2L), where Ln = La3+ (1), Nd3+ (2), Eu3+ (3), Gd3+ (4), Ho3+ (5), Er3+ (6), Tb3+ (7) or Yb3+ (8), and H2L = N,N′‐bis(salicylidene)‐4‐methyl‐1,3‐phenylenediamine, were formed in a self‐assembly process involving the lanthanide template‐i…
The polymorphism of titanyl phthalocyanine films, grown on atomically flat mica substrates, has been systematically studied by micro-Raman spectroscopy, correlating structure and optical properties. Different growth regimes, using hyperthermal seeded supersonic beams, have been explored as a function of the substrate…
Abstract Low temperature plasma (LTP) treatment of cobalt‐tetramethoxyphenylporphyrin (CoTMPP) has been applied as a promising alternative method to the conventional heat treatment in order to attain highly active catalysts for the electroreduction of oxygen. In this contribution it is shown that CoTMPP can be complet…
A magnetostrictive actuator with a hydraulic displacement amplification mechanism is designed to be used as a driver in active engine mounts. The dynamic response of the actuator is quantified in terms of the output displacement and the magnetostriction. Eddy current losses are modeled as a one-dimensional magnetic di…
We present strong photoluminescence from single Ag nanowires (NWs), their disordered blinking behavior, and their dependence on substrate potential. The stochastic bursts (<10 ms) in the photoluminescence trajectories of single Ag NWs in air are observed and attributed to the photoactivated fluorescence silver cluster…
Abstract Crystals of [Pt2(n‐pentylCS2)4I] show a transition from semiconductor to metallic with the increase of the temperature (conductivity is 0.3–1.4 S · cm−1 at room temperature) and a second metallic–metallic transition at 330 K, inferred by electrical conductivity measurements. X‐ray diffraction studies carried…
As if nothing had happened: A detailed mechanistic investigation of the nucleophilic addition of organolithium reagents onto single-walled carbon nanotubes (SWCNTs) revealed that the initial functionalization step is part of an equilibrium. Consequently, the functionalization of the sidewalls of SWCNTs is reversible,…
Muon-spin-spectroscopy measurements have been used to study the superconducting state of ${\text{FeTe}}_{0.5}{\text{Se}}_{0.5}$. The temperature dependence of the in-plane magnetic penetration depth, ${\ensuremath{\lambda}}_{ab}(T)$, is found to be compatible with either a two-gap $s+s$-wave or an anisotropic $s$-wave…
Abstract Vertically aligned carbon nanotubes and nanofibers are grown on metallic Ta and Pd underlayers at temperatures below 500 °C. Controlling the size of the grains of the underlayer film is critical because this leads to a more uniform distribution of catalyst dots, which in turn results in vertical alignment of…
X-ray photon correlation spectroscopy (XPCS) has emerged as a unique technique allowing the measurement of dynamics of materials on mesoscopic lengthscales. One of the most common problems associated with the use of bright x-ray beams is beam-induced radiation damage, and this is likely to become an even more limiting…
Skin protects the body from pathogens and degradation. Mummified skin in particular is extremely resistant to decomposition. External influences or the action of micro-organisms, however, can degrade the connective tissue and lay the subjacent tissue open. To determine the degree of tissue preservation in mummified hu…
The UV photodegradation of protein-resistant poly(oligo(ethylene glycol) methacrylate) (POEGMA) bottle-brush films, grown on silicon oxide by surface-initiated atom radical transfer polymerization, was studied using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Exposure to light with a wave…