Ulrich Behrens  Jan Petersen  Enno Lork  Paul G. Watson  Rüdiger Mews 《Angewandte Chemie (International ed. in English)》1997,36(17):1878-1879

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Silke Courtenay  Joshua Y. Mutus  Robert W. Schurko  Douglas W. Stephan 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2002,114(3):516-519

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Knob  Radim  Gerstmann  Silke  &#;abala  Radom&#;r  Frank  Hartmut 《Chromatographia》2009,69(11):1431-1435

Fused-silica capillaries covalently coated with polypyrrole offer some interesting properties for capillary electrophoresis. The polymeric, surface-bonded coating is chemically stable and reduces the adsorptive properties of the silica surface. At the same time, the weak positive surface charges offer the possibility of creating a strongly anionic surface when poly-sulfates are used as counter-ions. This affords an electroosmotic flow which is largely independent of pH. With sodium dodecyl sulfate in the background electrolyte, this effect is further enhanced. The potential of the approach is demonstrated with the separation of herbicides by micellar electrokinetic chromatography. Repeatability of electroosmotic mobility of less than 1% RSD is achieved.

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Bernd Giese  Barbara Carl  Thomas Carl  Thomas Carell  Christoph Behrens  Ulrich Hennecke  Olav Schiemann  Emiliano Feresin 《Angewandte Chemie (International ed. in English)》2004,43(14):1747-1747

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Wenzel SC  Meiser P  Binz TM  Mahmud T  Müller R 《Angewandte Chemie (International ed. in English)》2006,45(14):2296-2301

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Kai Fichtel  Ulrich Behrens 《无机化学与普通化学杂志》2005,631(12):2508-2516

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Bernd Giese  Barbara Carl  Thomas Carl  Thomas Carell  Christoph Behrens  Ulrich Hennecke  Olav Schiemann  Emiliano Feresin 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2004,116(14):1884-1887

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Thomas Panther  Ulrich Behrens 《无机化学与普通化学杂志》2000,626(9):1934-1941

Complexes with Macrocyclic Ligands. IV. Heterodinuclear Cobalt(II), Nickel(II), Copper(II), Zinc(II) and Palladium(II) Complexes with a Macrocyclic Ligand of Schiff‐Base Type: Syntheses and Structures The synthesis and properties of nickel(II), copper(II), and palladium(II) complexes, [ML^Ph] ( 3 ; L^Ph = N,N′‐phenylene‐bis(3‐formyl‐5‐tert.‐butyl‐salicylaldimine)), are described. These neutral mononuclear complexes react with metal(II) perchlorate and 1,3‐propylenediamine to form heterodinuclear, macrocyclic, cationic complexes of the type [MM′(L^Ph,3)]²⁺ ( 4 ; M = Ni, Cu, Pd; M′ = Co, Cu, Zn). The structures of the five new compounds [NiCo(L^Ph,3)](ClO₄)₂, [NiCu(L^Ph,3)](ClO₄)₂, [CuCu(L^Ph,3)](ClO₄)₂, [CuZn(L^Ph,3)](ClO₄)₂, and [PdCu(L^Ph,3)](ClO₄)₂ were determined by X‐ray diffraction.  相似文献   

    

Silke Julia Birgit Kurz  Udo Welzel  Ewald Bischoff  Eric Jan Mittemeijer 《Journal of Applied Crystallography》2014,47(1):291-302

The presence of planar faults complicates the diffraction stress analysis enormously owing to fault‐induced displacement, broadening and asymmetry of the Bragg reflections. A dedicated stress‐analysis method has been developed for highly planar‐faulted, fibre‐textured thin films of cubic crystal symmetry, using only specific reflections for diffraction stress analysis. The effect of unjustified use of other reflections has been demonstrated in the course of application of the method to Ni and Ni(W) thin films exhibiting excessive faulting and subjected to (1) a planar, rotationally symmetric stress state and (2) a planar biaxial stress state. In case 1 the crystallite‐group method has been used, whereas in case 2 the stress‐analysis method based on X‐ray stress factors had to be applied. The successful separation of stress‐ and fault‐induced reflection displacements has enabled the investigation of the mechanical behaviour of Ni and Ni(W) thin films by in situ stress measurements during tensile loading, thereby exposing pronounced stiffness and increased strength by alloying with W.  相似文献   

    

ZHAO Jing-Tai  SCHNELLE Walter  PASCHEN Silke  GRIN Yuri 《高等学校化学学报》2000,21(Z1):205

Intermetallic compounds constitute a very large fraction of inorganic compounds. Understanding these compounds with respect to their structures, chemical bonding, and physical properties is very important to fundamental materials science. The so-called Zintl phase (valence compound) subset of these has been of interest to many investigators for many years, and some understanding of this class of compounds has greatly broadened our views of chemical bonding^[1-3].Some progress has been achieved for compounds between alkali metals and the triels Ga, In, Tl^[4] Besides some structural reports^[5-9], ternary systems of rare earth-trels-tetrels are especially lack of broad and further exploration. Here we report more than ten new compounds characterized in these systems. The as cast samples were synthesized by High Frequency melting method inside Ar-glovebox followed by annealing in silica tubes. Lattice parameter refinements were done from powder data using Si as an internal standard. The structures were determined either from single crystal or from powder XRD full profile refinements. The physical properties of the compounds will be discussed together with their structures and bonding features. The compounds show, depending on compositions, metallic Zintl phase, magnetic ordering, heavy Fermion behaviour or other phase transitions. The compounds have both rich structural chemistry and physical properties.  相似文献