Materials Literature
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Anschalten der UV-Reaktivität: Der silylierte Dioxouran(V)-Komplex [(Me3SiOUO)2(L)2] (A) ist inert gegen Oxidation, kann aber nach Zweielektronenreduktion zu [(Me3SiOUO)2(L)]2− (1) zu [OU(μ-O)2UO(L)2]2− (2) mit wiederhergestelltem Uranylcharakter desilyliert werden. Beim Entfernen der Silylgruppe zeigt sich eine neue…
The mechanization of the footwear industry started during the seventeenth century after the invention of sewing machines and equipment to roll sole leather (Quimby, 1944), and prior to that the shoe production was completely manual. In today’s society, footwear has become increasingly specialized for a variety of task…
Porous materials are of great importance because of their multiple applications in pharmacy, catalysis, and biomedicine among others. Ice segregation induced self-assembly (ISISA) is a cryogenic technique that uses the ice as a template that forms upon immersion of a polymer solution into liquid nitrogen to obtain hig…
Palladium-catalyzed hydrogenation of an octahedral zinc trans-ditriflate hemiporphyrazine "HpH2Zn(OTf)2" furnishes a new macrocycle "HpH6Zn(OTf)2". This reaction is fully reversible upon heating in nitrobenzene, and the conversion is easily monitored by changes in color and fluorescence properties. The reversible cycl…
C 60 molecules have been functionalized according to the Prato method with the short S-acetyl-protected chains. The redox properties of this fullerene derivative in the solution reveal reversible 1e reduction - oxidation steps similar to those of C 60 but shifted to more negative potentials. The in situ deprotected fu…
The influence of pre-stressing an aluminum substrate on pore ordering of a porous anodic alumina (PAA) membrane has been investigated. Samples of pure aluminum were constrained and unconstrained stressed until plastic deformation before potentiostatic anodization. Characterizations of the resulting PAA membranes were…
A cyclic octameric water cluster is trapped in a 3-D supramolecular architecture [Cu2(H2O)2(bpca)2L]8H2O, where bpca = bis(2-pyridylcarbonyl)amide and L = sebacic acid. The striking feature of the octameric cluster is that each water donates one hydrogen to adjacent waters to form a circular water ring in a (O–HO–H)4…
We report a nanowire-quantum-dot-polymer solar cell consisting of a chemically treated CdSe quantum dot film deposited on n-type ZnO nanowires. The electron and hole collecting contacts are a fluorine-doped tin-oxide/zinc oxide layer and a P3HT/Au layer. This device architecture allows for enhanced light absorption an…
Abstract The epoxidation of olefins with methyltrioxorhenium (MTO) in the presence of various chiral oxazolines and pyridinebis(oxazoline) ligands as well as achiral N‐ligands has been investigated. By applying 1‐octene as a model system, reaction conditions were optimized, and high yields and good chemoselectivity (>…
Using a first-principles theoretical model the adsorption of a methyl radical on different sized silver nanoparticles is compared to the adsorption of the same radical on model surfaces. Calculations of our structural, dynamical and electronic properties indicated that small changes in the local environment will lead…
To obtain an insight into the interactions of potential anticonvulsant drugs with their surrounding, two series of 5-methyl-5-aryl- and 5-ethyl-5-arylhydantoins were synthesized and their absorption spectra were recorded in the region from 200 to 400 nm in a set of selected solvents. The effects of solvent dipolarity/…
Abstract In this contribution, a new highly selective colorimetric chemosensors based on naphthalimide and coumarin was synthesized and characterized by NMR and mass spectroscopic techniques. In the presence of F ‐ or OH ‐ , the sensor change its color from light yellow to deep blue, which can easily be observed by th…
Evaluation of the individualization state in single-walled carbon nanotube solutions using absorption, Raman and photoluminescence spectroscopy, Jung, Wonsuk, Woo, Ju Yeon, Lee, Seung Ho, Kim, Duckjong, Kim, Soohyun, Han, Chang-Soo
Abstract Adsorption of pyridine on Nin‐clusters (with n = 2,3,4) is studied by quantum chemical calculations at B3LYP/LANL2DZ and B3LYP/6‐311G** levels. First, Nin‐clusters are investigated for accessible structure and electronic states. The lowest electronic state with four unpaired electrons is predicted for Ni4‐clu…
We report the synthesis of silver nanodecahedrons (Ag NDs) and their use as surface enhanced Raman scattering (SERS) nano-composites. The as-prepared Ag NDs possess strong localized surface plasmon resonance (LSPR) with widely tunable peaks between 420–660 nm, which was formerly not possible, thus greatly improving th…
Mass production of soluble graphene still remains a challenge, although several methodologies have been proposed. Here we report a rapid and efficient method for the synthesis of soluble graphene nanosheets (GNSs) with long-term dispersion stability in both aqueous and common organic solvents. Within only 12 min at 95…
We report a fast computational method for generating atomistic models of complex-shaped carbon graphitic nanostructures from their computer-aided design (CAD) representation. The novelty of the method is the adaptation of a fast finite element (FE) triangular surface mesh generation algorithm for complex geometric sur…
Nanoporous gold was formed by electrochemical alloying and dealloying of gold with Li in an organic electrolyte at room temperature. After the electrochemical dealloying, fine pores were formed on the gold electrode. However, the total anodic charge (charges consumed for delithiation) was less than half of the total c…
We study, by means of full-electrodynamic calculations using the layer-multiple-scattering method, the effect of diffractive coupling on the enhancement of the local electromagnetic field in periodic arrays of nanolenses consisting of three silver spheres with progressively decreasing sizes and separations. The intera…
One-dimensional, self-consistent Schrödinger–Poisson equations are solved for the wurtzite Mg x Zn1− x O/ZnO heterostructure (0.1 < x < 0.3). For the [] orientation, a polarization-induced two-dimensional electron gas (2DEG) is found to be populated at the pseudo-triangular quantum well (QW) that is formed at Mg x Zn1…