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  • 1
    Electronic Resource
    Electronic Resource
    Voltammetry and LCEC of isoflavones (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 796-799 
    Details
    ISSN: 1040-0397
    Keywords: Isoflavones ; Cyclic voltammetry ; High-performance liquid chromatography ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This study provides electrochemical and LCEC determination for three of the most abundant and most important isoflavones, Biochanin A, formononetin, and genistein. Cyclic voltammetry and pH-potential diagrams show that the isoflavones undergo pH-dependent irreversible oxidations. The LCEC determination of the isoflavones has been optimized for mobile phase composition and detection potential. Sub-nanogram detection limits have been achieved.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091013
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electrochemistry of hexacoordinate silicon(IV) porphyrin complexes (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 1273-1277 
    Details
    ISSN: 1040-0397
    Keywords: Cyclic voltammetry ; Porphyrins ; Silicon ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cyclic voltammetry was used to characterize the oxidation-reduction behavior of a series of novel hexacoordinate silicon(IV) porphyrin complexes. Each (Por)SiX2 [Por = the dianions of the porphyrins: tetrakis(p-tolyl)porphyrin (TTP), tetraphenylporphyrin (TPP), tetrakis(p-trifluoromethylphenyl)porphyrin (TTFP), octaethylporphyrin (OEP), × = F, Cl, O3SCF3] complex undergoes one to two oxidations and one to two reductions, all occurring at the porphyrin ring. No silicon(IV) reduction is observed for any of the porphyrin complexes. The effects of solvent, supporting electrolyte, substituents on the porphyrin ring, axial ligands, certral metal, and ruffling of the porphyrin ring are described.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091611
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    Paper (German National Licenses)
    Fulltext
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