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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 3532-3536 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 3536-3540 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 515-520 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The interactions of 5-(4-carboxyphenyl)-10,15,20-tritolyl porphyrin (TTPa)Abbreviations: TTPa: 5-(4-carboxyphenyl)-10,15,20-tritolyl porphyrin; BQ: 1,4-benzoquinone; DQ: 2,3,5,6-tetramethyl 1,4-benzoquinone; CHLQ: 2,3,5,6-tetrachloro 1,4-benzoquinone; DMSO: dimethyl sulfoxide with benzoquinones have been studied by spectrophotometry and steady state and transient fluorescent methods. TTPa forms a 1:1 molecular complex with 1,4-benzoquinone, 2,3,5,6-tetramethyl 1,4-benzoquinone and 2,3,5,6-tetrachloro 1,4-benzoquinone in dimethyl sulfoxide at room temperature. The equilibrium constants for the interaction of TTPa with the different quinones were evaluated.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The oxidative degradation of 3-amino 5-methyl isoxazole initiated by the VUV photolysis of water at 172 nm has been studied. Mineralization of CO2, H2O, NO 3 − and NH 4 + is more efficient when reductive conditions (argon saturated solutions) are favoured. Formation of compounds which cannot be completely oxidised to CO2 is observed. Experiments performed under strictly oxidative conditions show higher yields of these inert compounds and, hence, incomplete mineralization. Cyanide was formed in concentrations lower than 5×10−5 mol/l. In alkaline aqueous solutions, cyanide is completely transformed into CO 3 2− , NH 4 + and NO 3 − during the irradiation time needed to mineralize the isoxazole. Therefore, cyanide does not present a potential risk for the use of the VUV photolysis for isoxazole degradation. Similarly, organic nitrogen is converted into both, NO 3 − and NH 4 + . The relative concentrations of the two ions depend on total irradiation time, oxygen saturation and reactor geometry. A sequence of reactions is proposed and discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 30 (1998), S. 491-496 
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photolysis of S2O8= in strong alkaline solutions (pH 〉 13) in the presence of molecular oxygen yields ozonide radical ions, \documentclass{article}\pagestyle{empty}\begin{document}$ \rm{O^{\textstyle{\cdot}-}_{3}} $\end{document}. These radicals show a complex decay rate sensitive to the peroxodisulfate concentration. A reaction mechanism, which includes the reaction of O•- and S2O8= with a rate constant k=(3-6)×106M-1s-1 and accounts for the experimental results is discussed. © 1998 John Wiley & Sons, Inc. Int J Chem Kinet: 30: 491-496, 1998
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 29 (1997), S. 589-597 
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The photolysis of strong alkaline (pH〉12.7) solutions of H2O2 yields O·-, which in the presence of molecular oxygen forms the ozonide radical ion, O3·-. A detailed kinetic study on the reaction mechanisms involved during formation and decay of O3·- radical ions in these solutions, in the presence and absence of added O·-/HO· scavengers is reported.In order to obtain a complete interpretation of the experimental data, kinetic computer simulations were done using a complete set of reactions. A very good agreement between experimental and computer simulated data is obtained. The following simplified mechanism accounts for the observed first-order decay of O3·- in alkaline hydrogen peroxide solutions:O·- + O2 → O3·-O3·- → O·- + O2O·- + S →OH· + S →HO· + HO2- → O2·- + H2OO·- + HO2- → O2·- + HO-With S: O·-/HO· scavengers. © 1997 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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