Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Rb2[AuII2][AuIIII4], dirubidium diiodoaurate(I) tetraiodoaurate(III), has a tilted and distorted perovskite-type structure which is isotypic with its bromide analogue Rb2[AuIBr2][AuIIIBr4]. The structure contains compressed and elongated [AuI6] octahedra tilted away from each other and stacked alternately along th…
Abstract For the first time we studied Raman, exciton and EPR spectra of PbI 2 layered crystals of 2H polytype doped with high concentration of Mn impurity. A novel type of Fermi resonance was found. The anomalous temperature shift of the exciton band n = 1 was registered. It was shown that this shift can be explained…
Abstract Near‐spherical dendrimers can be used as templates for bottom‐up syntheses of semiconductor clusters. Starting from methanolic solutions of Cd 2+ , sulfide, and poly(amidoamine) dendrimers, CdS clusters precipitate at the dendrimers. A preparation inside the dendrimers is only possible when the protonation of…
Crystals of CsGd(PO3)4 have been grown by the flux technique from a mixture of CsH2PO4, Gd2O3 and H3PO4. CsGd(PO3)4 crystallizes in structure type IV of the MIMIII(PO3)4 (MI = alkali metal, MIII = rare earth or Bi) family of compounds. The structure consists of a three-dimensional framework made up of spiral (PO3)n ch…
Direct 1N-amination of the triazole-fused zinc phthalocyanine 2 and oxidation of the formed amino derivative 3 resulted in the generation of the very reactive intermediate, the dehydrometallophthalocyanine 4, which was not known previously. The latter was trapped in situ with different dienes, for example, furan, tetr…
The Sparkle/AM1 model is extended to ytterbium (III) complexes. Thus, a set of 15 complexes, with various representative ligands, chosen to be representative of all complexes of high crystallographic quality (R-factor <0.05 A) in the Cambridge Crystallographic Database, and which possess oxygen and/or nitrogen as coor…
Die selektive Keimbildung von Aragonit lässt sich mit Blockcopolymer-Mikrogelen sehr niedriger Konzentration (0.1 ppm) bei Umgebungsbedingungen in Wasser erreichen. Ein Polymertemplatpartikel genügt, um die Bildung eines Rings aus Aragonit-Einkristallen zu steuern, die sich zu einer Garbenstruktur weiterentwickeln (si…
Von linear zu dendritisch: Glycin ist Teil der in Kollagenproteinen vorherrschenden Sequenz, und Aspartat ähnelt der Wiederholungseinheit von Poly(benzylglutamaten) (PBGs). Kollagen und PBGs sind lineare Peptide, die sich zu Fasern selbst organisieren, flüssigkristalline Phasen bilden und Lösungsmittel gelieren können…
The phase behavior of a two-dimensional colloidal system subject to a commensurate triangular potential is investigated. We consider the integer number of colloids in each potential minimum as rigid composite objects with effective discrete degrees of freedom. It is shown that there is a rich variety of phases includi…
A porphyrin molecule containing four meso-appended 2,2'-bipyridyl ligands has been prepared. Each bipyridine is attached to the porphyrin core at the 4-position (pseudo-para to one of the pyridine nitrogens). Subsequently, each of the four bipyridines was complexed with a RuL2(2+) moiety and iron coordinated in the po…
Recently synthesized zinc helicenocyanine (ZnHc), where four helicene groups are fused with a phthalocyanine (Pc) core through all-carbon linkages, exhibits an unusually strong tendency of forming soluble molecular aggregates in organic solvents. The aggregation results in a strong optical absorption across most of th…
The cobalt(II) and iron(II) siloxane compounds were prepared by the reaction of lipophilic N-bonded silanetriol 1 with metal silylamides M[N(SiMe3)2]2 (M = Co (2), Fe (3)) in a 1:1 and 3:4 molar ratio, respectively. A plot of 1/chi versus temperature in the range of 2-300 K indicates the paramagnetic behavior of 2 and…
Both the intermolecular interaction energies and the geometries for $M\ensuremath{\cdots}$ thiophene, $M\ensuremath{\cdots}$ pyrrole, ${M}^{n+}\ensuremath{\cdots}$ thiophene, and ${M}^{n+}\ensuremath{\cdots}$ pyrrole (with $M=\mathrm{Li}$, Na, K, Ca, and Mg; and ${M}^{n+}={\mathrm{Li}}^{+},\phantom{\rule{0.3em}{0ex}}{…
Wankelmütig: In einem einfachen elektrochemischen Prozess werden superhydrophobe leitende Polypyrrol(PPy)-Filme hergestellt. Diese Filme sind durch eine ausgedehnte poröse Struktur mit Rauigkeit auf der Grob- wie der Feinskala gekennzeichnet (siehe Bild). Über die Wahl des elektrischen Potentials können die PPy-Filme…
The influence of the supracrystalline organization of nanocrystals on the low-frequency Raman scattering by the metallic nanocrystal vibrations is theoretically studied. Two effects are considered: on the one hand, the effect of the Lorentz electric field, and, on the other hand, the effect of the coherence due to the…
In this study, atomic force microscopy (AFM) is used to image freshly cleaved MgO(100) and CaCO3(104) as these surfaces undergo reaction with water and nitric acid under ambient conditions of temperature, pressure, and relative humidity. The reaction of water and nitric acid results in the formation of hydroxylated an…
Aristotle said, “In all things of nature there is something of the marvelous.” Nitric oxide is one such marvel. Few could have predicted that one atom of nitrogen and one of oxygen would together be a fundamental regulator of the human body. Among the endogenous defenses against vascular injury, inflammation, thrombos…
Abstract The grafting of styrene on soy protein isolate (SPI) in an 8 moL/L urea aqueous solution initiated by ammonium cerous nitrate and potassium persulfate was studied. The grafted copolymers were characterized by IR spectroscopy and DSC. The results indicated that styrene was grafted on the SPI. The influence of…
The behavior of endothelial cells (HUVECs) in contact with thin collagen films presenting different supramolecular organizations was investigated. Collagen was adsorbed on polystyrene (PS) and plasma-oxidized PS (PSox) in conditions ensuring the formation of continuous layers presenting an increasing density of fibril…
Abstract In this study, the effects of the elastomer type—ethylene–propylene–diene monomer (EPDM), three kinds of ethylene vinyl acetate (EVA 9, EVA 18, and EVA 28, where the number is the vinyl acetate concentration), and styrene–butadiene–styrene—and content on the microstructure and mechanical and thermal propertie…