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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 87 (1983), S. 1343-1349 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The complexation of Na+ and K+ cations by the polycyclic ligand tribenzo-15 crown-5 is studied in a methanol-dimethylformamide mixture. As opposed to the monomer benzo-15 crown-5, this trimer shows a marked selectivity for K+ with respect to Na+. This selectivity is due to the existence of associated farms of the K+ complexes in solution; at high concentration a salt precipitates, which presents a polymeric structure of stoichiometry 3 K+/ 2 trimers.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-193X
    Keywords: Conjugation ; Boron ; Sensors ; Cyclic voltammetry ; Polymers ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---New electropolymerizable aromatic compounds (i.e. pyrrole, thiophene, aniline) bearing boronic acid and ester substituents have been synthesized and their electrochemical behavior has been investigated. Functionalized polythiophene and polypyrrole films could be anodically generated in acetonitrile, whereas the polyaniline derivative was electroformed in an acidic aqueous solution. The electrochemical responses of some of these materials were changed when fluoride ions were added to the electrolytic solutions. The strongest modifications, caused by binding of fluoride by the immobilized boron, were observed for the polypyrrole derivative in hydroorganic media.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Elektrochemisch induzierte, homogene Elektronenübertragung auf aromatische DisulfideDie Geschwindigkeitskonstante der heterogenen Elektronenübertragung von einer Platinelektrode auf aromatische Disulfide ist klein, während die homogene Elektronenübertragung von geeigneten aromatischen Radikalanionen wesentlich rascher stattfindet. Derartige Radikalanionen von aromatischen Verbindungen können elektrochemisch bei Potentialen erhalten werden, die zwar negativer als das Standard-Reduktionspotential des Disulfids, aber nicht negativer als die beobachteten Reduktionspotentiale der Disulfide sind. Es wird der Versuch unternommen, E0-Werte von aromatischen Disulfiden aus den Geschwindigkeiten homogener Elektronenübertragungen durch einige Donoren und den reversiblen Redoxpotentialen dieser Donoren zu ermitteln.
    Notes: The rate constant of the heterogeneous electron transfer from a platinum electrode to aromatic disulfides is low, whereas the homogeneous electron transfer from suitable aromatic anion radicals is much faster. Anion radicals of such aromatic compounds can thus be generated electrochemically at potentials more negative than the normal standard reduction potential of the disulfide, but less negative than its observed reduction potential. An attempt is made to estimate E0 of the aromatic disulfides from the rates of the homogeneous electron transfer from a number of donors and the reversible redox potential of these donors.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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