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  • allyl hydroperoxide  (1)
  • photooxidations  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Selective oxidation of propylene by O2 with visible light in a zeolite (1995)
    Springer
    Catalysis letters 35 (1995), S. 1-12 
    Details
    ISSN: 1572-879X
    Keywords: propylene-oxygen photochemistry ; selective propylene oxidation ; zeolite BaY ; propylene-to-acrolein conversion ; allyl hydroperoxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Propylene and O2 loaded into zeolite BaY were found to react upon irradiation with green or blue light in a single photon process. In situ monitoring by FT-infrared spectroscopy showed that allyl hydroperoxide is the predominant product at −100°C. At room temperature, acrolein, propylene oxide, and allyl hydroperoxide were observed in comparable amounts. The aldehyde and epoxide are shown to emerge from secondary thermal chemistry of the allyl hydroperoxide photoproduct. The selectivity in terms of the hydroperoxide photoproduct is very high (98% at room temperature) even at high propylene conversion. Diffuse reflectance spectra show that access to the mild oxidation path is made possible by a zeolite-induced shift of the propylene O2 charge-transfer absorption from the UV into the visible region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00806998
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  • 2
    Electronic Resource
    Electronic Resource
    Highly Selective Formation of tert-Butyl Hydroperoxide from the Reaction of Isobutane and O2 in a Zeolite under Visible Light (1996)
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 2 (1996), S. 385-389 
    Details
    ISSN: 0947-6539
    Keywords: hydroperoxides ; isobutane ; oxygen ; photooxidations ; zeolites ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Isobutane and oxygen gas loaded into zeolite BaY react upon irradiation with green or blue light to yield tert-butyl hydroperoxide in a single-photon process. This was discovered when monitoring the reaction at room temperature in situ by FT-infrared spectroscopy. Selectivity was 98%, even upon conversion of more than half of the reactants loaded into the zeolite. Diffuse reflectance spectra revealed a visible absorption tail which originates from an isobutane · O2 collision complex. It is attributed to the isobutane · O2 contact charge-transfer absorption, whose onset is shifted from the UV into the visible region by the high electrostatic field of the zeolite.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chem.19960020406
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    Paper (German National Licenses)
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