The dehydrohalogenation of a silicon(IV)-substituted diphenyl hydrazone derivative leads to a dimer of a N-substituted hydrosila hydrazone, which consists of a four-membered Si 2 N 2 core and a hydrogen attached to each of the silicon atoms instead of giving a substituted hydrosilaneimine. The compound is obviously formed by dimerization of hydrosilaneimine. Moreover there are no straightforward synthetic methods known for the synthesis of silaaziridine. The preparation of such species would be of special importance for the development of a new field of silicon chemistry. The reaction of chlorosilylene, LSiCl, and PhCHdNPh resulted in a base-stabilized silaaziridine. All compounds were characterized by NMR spectroscopy, mass spectrometry, microanalysis, and X-ray structural analysis.Supporting Information Available: X-ray data for 2, 3, and 4 (CIF). This material is available free of charge via the Internet at http://pubs.acs.org.
Please cite this article as: C.E.A. Andrade, X. Ma, W. Meyer-Klaucke, C. Schulzke, The difference one ligand atom makes -an altered oxygen transfer reaction mechanism caused by an exchange of selenium for sulfur, Polyhedron (2009Polyhedron ( ), doi: 10.1016Polyhedron ( /j.poly.2009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPTThe difference one ligand atom makes -an altered oxygen transfer reaction mechanism caused by an exchange of selenium for sulfur Carlos Enrique Abad Andrade, [a] Xiaoli Ma, [b] Wolfram Meyer-Klaucke, [ AbstractThe influence of sulfur versus selenium coordination to molybdenum on the oxo transfer reaction mechanisms of functional models for oxidoreductases has been studied. The solution structure of the dimeric molybdenum compound with tridentate bis-anionic ligands containing a thioether function ( -O(CH 2 ) 3 S(CH 2 ) 3 O -) has been determined using EXAFS spectroscopy to be able to compare a feature of its solution structure to that of its selenoether analogue. A significant difference is found for the solution structures of the two compounds. The thioether group remains coordinated in solution, whereas the selenoether does not. The influence of this difference on the catalytic oxo transfer has been investigated in detail by following the catalytic transition of PPh 3 to OPPh 3 with DMSO as oxygen donor with variation of both substrate concentrations.
<p>Improvements in bioanalytical technologies are driven by evolving threats and challenges to the global community. These challenges include emerging diseases, the need for substance screening and increasing environmental pollution. Here, we present a new bioanalytical concept that employs nanosized Metal-Organic Framework (MOF) particles as labels for antibody-based analytical methods, including enzyme-linked immunosorbent assay (ELISA) and lateral flow immunoassay (LFIA). A strategy for covalently linking antibodies to form stable, colloidal Zeolitic Imidazolate Frameworks (ZIFs) conjugates is described. The proof of principle for their use in LFIA is presented. In particular, ZIF-antibody conjugates displayed excellent behaviour in dispersion and good mobility via lateral flow on a solid substrate while retaining full selectivity of the antibody. Moreover, protein aggregation of the antibodies was prevented, suggesting protection against degradation in an exoskeleton-like manner. Our study could inspire future work to address global bioanalytical and diagnostic challenges.</p>
<p>Improvements in bioanalytical technologies are driven by evolving threats and challenges to the global community. These challenges include emerging diseases, the need for substance screening and increasing environmental pollution. Here, we present a new bioanalytical concept that employs nanosized Metal-Organic Framework (MOF) particles as labels for antibody-based analytical methods, including enzyme-linked immunosorbent assay (ELISA) and lateral flow immunoassay (LFIA). A strategy for covalently linking antibodies to form stable, colloidal Zeolitic Imidazolate Frameworks (ZIFs) conjugates is described. The proof of principle for their use in LFIA is presented. In particular, ZIF-antibody conjugates displayed excellent behaviour in dispersion and good mobility via lateral flow on a solid substrate while retaining full selectivity of the antibody. Moreover, protein aggregation of the antibodies was prevented, suggesting protection against degradation in an exoskeleton-like manner. Our study could inspire future work to address global bioanalytical and diagnostic challenges.</p>
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