Materials Literature
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Transient state kinetics of the catalytic oxidation of CO with O(2) on Pd-surfaces has been measured under isothermal conditions by using a molecular beam approach. Systematic studies were carried out as a function of reaction temperature and CO+O(2) composition. With sufficient kinetic evidence, we have demonstrated…
Abstract The traditional principle of the mid‐twentieth century that ‘stronger chemical bonds imply a weaker thermal expansion' appeared to be valid for cubic crystals but failed to explain many cases of real high anisotropic thermal expansion of non‐cubic crystals. In particular, the discovery, a quarter of a century…
A fast and single-step method was successfully developed toward synthesizing well-ordered organic-inorganic hybrid layered manganese oxide (LMO) nanocomposites and Keggin/organic ions intercalated into layered manganese oxide at room temperature in 1 day. The ordering of layered structures is highly dependent on pH an…
Abstract Three new manganese compounds have been obtained by reaction of the 2,6‐diacetylpyridine dioxime (dapdoH 2 ) ligand with several Mn II salts. By using a variety of manganese(II) carboxylates, three Mn II derivatives with general formula [Mn 3 (RCOO) 6 (dapdoH 2 ) 2 ], where RCOO – = formate ( 1 ), acetate ( 2…
A trinuclear manganese complex, [Mn 3O(Me-salox) 3(2,4'-bpy) 3(ClO 4)].0.5MeCN ( 1.0.5MeCN; Me-H 2salox = 2-hydroxyphenylethanone oxime), has been synthesized and characterized structurally as a [Mn (III) 3(mu 3-O)] (7+) core. Structural distortion by the twisting of the oxime ligand dominates ferromagnetic interactio…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSeparation Promoted by Molecular Recognition of a Core Engineered Macromolecular NanocapsuleDecheng Wan*, Hongting Pu, and Xiangyu CaiView Author Information Institute of Functional Polymers, Key Laboratory of Advanced Civil Enginee…
In this manuscript, we report the first successful epitaxial growth of ZnO nanowires on ZnS nanobelts via the metal organic chemical vapor deposition (MOCVD) method. The compositional and structural analyses show that the product consists of wurtzite-structured ZnS/ZnO nanobelt/nanowire heterostructures, which have an…
We recently reported the synthesis and testing of a new class of unimolecular micelles based on hyperbranched polyglycerols as second generation synthetic plasma expanders and as general drug delivery vehicles. A detailed biodistribution study of two derivatized hyperbranched polyglycerols of different molecular weigh…
Abstract In the search for materials with negative thermal expansion, the HfMgMo 3 O 12 phase has been synthesized and characterized for the first time. It is established that this phase belongs to a new class of ceramics with the general formula A 4+ B 2+ M 6+ 3 O 12 that crystallizes in orthorhombic symmetry of spac…
Anders als die anderen: Ein molekularer Palladiumoxid-Cluster entstand unter milden Bedingungen aus Palladium(II)- und Arsen(V)-Reagentien. Die Titelverbindung hat eine verzerrt-kubische Form mit einer Kantenlänge von 1 nm und zeigt überraschende elektrochemische und katalytische Eigenschaften. Die dreizehn PdII-Ionen…
Eu 3+ -activated double perovskite-type nanosheet phosphor (K 1.5 Eu 0.5 )Ta 3 O 10 has been prepared by the soft chemical exfoliation reaction of K(K 1.5 Eu 0.5 )Ta 3 O 10 bulk precursor. The lateral size of the nanosheet product ranges from 0.1 to a few micrometers, and the thickness is uniformly 2.4(2) nm. The latt…
Was die Kontraktion verursacht: Das metall-organische Gerüst [Cu3(btc)2] weist über einen breiten Temperaturbereich eine negative thermische Ausdehnung (NTE) auf. Ursache sind zwei parallel ablaufende Mechanismen, von denen jeder einzigartig für NTE-Systeme ist: die konzertierte transversale Schwingung dreieckiger org…
The solubility of salicylic acid in water, methanol, ethanol, ethyl acetate, polyethylene glycol (PEG) 300, and 1,4-dioxane and in various binary solvent mixtures, methanol + water, ethanol + water, ethanol + ethyl acetate, PEG 300 + water, and 1,4-dioxane + water, were determined using high-performance liquid chromat…
Mesoporous silica film with oriented mesochannels in three dimensions was supposed to have significant potential in preparing a new kind of optical or microelectronic device. Here we reported a new approach to preparing an oriented mesostructured silica film by just employing rapid and hot air flow. Based on this appr…
Are you N-fused? Doubly N-fused porphyrin (see picture; Br red, F green, N blue) exhibits exceptionally long-wavelength absorption for an 18π aromatic system (in excess of 1600 nm). The HOMO–LUMO energy gap of doubly N-fused porphyrin is extremely small for an [18]annulenic compound and results from endocyclic extensi…
This work reports the stability and solubility of nesquehonite in several salts (NaCl, NH 4 Cl, MgCl 2, and KCl) over the temperature range of (15 to 35) °C. The needle-like nesquehonite used in this work was prepared by the reaction of analytical pure MgCl 2 with Na 2 CO 3 . The concentration investigated for all sal…
Nicht alles was glänzt …︁ Die Aktivität immobilisierter Gold-Nanopartikel hängt von der Herstellungsmethode ab. Goldcluster mit 2 nm Durchmesser wurden auf nichtreduzierbaren Metalloxiden und Kohlenstoffmaterialien abgeschieden, indem ein fester flüchtiger Goldkomplex in einer Kugelmühle zermahlen und anschließend kal…
Small atomic gold clusters in solution, Au n , stabilized by tetrabutyl ammonium bromide (TBABr), have been synthesized by a simple electrochemical technique, based on the anodic dissolution of a gold electrode in the presence of TBABr salt, and using acetronitrile as solvent. The presence of clusters in the range Au3…
Ubiquitous D-alanylation of lipoteichoic acids modulates the surface charge and ligand binding of the gram-positive cell wall. Disruption of the bacterial DltABCD gene involved in teichoic acid alanylation, as well as inhibition of the DltA protein, has been shown to increase a gram-positive bacterium's susceptibility…
Abstract In this study, fast‐scan cyclic voltammetry (FSCV) was used to compare responses to neurochemicals of various carbon fibers, with different conductivities and carbon precursors. Pitch‐based P‐25 and P‐55 fibers were compared to polyacrylonitrile‐based T‐650 and HM fibers. Highly conductive fibers such as P‐55…