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  • 1
    Electronic Resource
    Electronic Resource
    An electron spin resonance study of the radiation damage of polysulphone (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 157 (1972), S. 103-109 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: ESR-Untersuchungen an γ-bestrahltem Polysulfon (aus 2.2′-Bis(4-hydroxyphenyl)-propan und 4.4′-Dichlorodiphenylsulfon) und an niedermolekularen Modellsubstanzen (Diphenylsulfon, 2.2′-Diphenylpropan, Diphenyläther) zeigen, daß die meisten erzeugten Radikale im Polymeren durch Reaktion mit den aus den Methylgruppen frei gemachten Wasserstoffatomen erzeugt werden. In großer Menge entstehen cyclohexadienylartige Radikale sowie Phenoxy- und ArṠO2-Radikale. Für diesen Mechanismus der Radikalerzeugung sprechen ferner die Ergebnisse von Untersuchungen, in denen das Polymere freien Wasserstoffatomen aus einer H2-Gasentladung ausgesetzt wurde.
    Notes: ESR studies of γ-irradiated polysulphone (prepared from 2.2′-bis(4-hydroxyphenyl)-propane and 4.4′-dichlorodiphenyl sulphone) and its model compounds (diphenyl sulphone, 2.2′-diphenyl propane, diphenyl ether), suggest that the majority of radicals produced in the polymer are formed by the subsequent reactions of hydrogen atoms released from the pendant methyl groups by the action of the γ-radiation. Cyclohexadienyl-type radicals are produced in quantity together with phenoxy and ArṠO2 radicals. Supporting evidence for the mechanism is obtained from studies of the hydrogen atom bombardment of the polymer.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021570109
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  • 2
    Electronic Resource
    Electronic Resource
    Electron spin resonance studies of inorganic radicalsTaken from the lecture ‘Radicals I Have Loved: Electron Spin Resonance Studies of Inorganic Radicals’ presented at the L. H. Sutcliffe Symposium on Magnetic Resonance, University of Surrey, 24th March 1995. (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. S3 
    Details
    ISSN: 0749-1581
    Keywords: electron spin resonance ; inorganic radicals ; atoms ; matrix effects ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A brief review is given of the ways in which ESR spectroscopy has been used to shed light on the electronic structures of simple inorganic radicals. These include atoms (H·, N:·, O2·, Ag·); diatomic radicals (·OH, ·NO, O2-·), AB2 species(·CO2-, ·NO2, HĊO, O3-·, etc.), AB3 species (·NH3+, ·CH3, ·BH3-, ·NO32-, ·SO3-, NO3·, H2ĊN, etc.) and AB4 centres (PO42-·, ·PO44-, ·PF4, etc.). Matrix effects on these species are described and rationalized, and aspects of reaction mechanisms in which they participate are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260331304
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