Pulse radiolysis study on tetra-alkylammonium hydroxides in alkaline solutions containing O2 and N2O

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI:10.1016/0020-7055(76)90018-8

K. Bobrowski, J.P. Suwalski, Z.P. Zagórski

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引用次数: 2

Abstract

The reactivity of the oxide radical ion, O⁻, and the decay kinetics of the ozonide ion, O₃⁻, have been investigated in aqueous solutions at pH 12·8, in the presence of tetramethyl-, tetraethyl-, tetrapropyl- and tetrabutylammonium ions, O₂ and N₂O. Using pulse radiolysis to follow the O₃⁻ kinetics gives information on the competition of O₂ and R₄N⁺ for O⁻. Absolute rate constants for these reactions are: 3·0 × 10⁸ dm³ mol⁻¹ s⁻¹ for O⁻ + (CH₃)₄N⁺, 1·0 × 10⁹ dm³ mol⁻¹ s⁻¹ for O⁻ + (C₂H₅)₄N⁺, 1·3 × 10⁹ dm³ mol⁻¹ s⁻¹ for O⁻ + (C₃H₇)₄N⁺ and 2·2 × 10⁹ dm³ mol⁻¹ s⁻¹ for O⁻ + (C₄H₉)₄N⁺.

The decay of O₃⁻ occurs through the thermal dissociation reaction, O₃ ⇌ O₂ + O⁻, for which the absolute rate constant at 22°C was found to be 6·2 ± 1·2 × 10³ s⁻¹.

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四烷基氢氧铵在含O2和N2O碱性溶液中的脉冲辐射分解研究

研究了在pH为12.8的水溶液中，四甲基、四乙基、四丙基和四丁基铵离子O2和N2O存在下氧化自由基离子O−的反应性和臭氧离子O3−的衰变动力学。利用脉冲辐射分解来跟踪O3−动力学，可以得到O2和R4N+对O−竞争的信息。这些反应的绝对速率常数为:O−+ (CH3)4N+的3·0 × 108 dm3 mol−1 s−1,O−+ (C2H5)4N+的1·0 × 109 dm3 mol−1 s−1,O−+ (C3H7)4N+的1·3 × 109 dm3 mol−1 s−1,O−+ (C4H9)4N+的2·2 × 109 dm3 mol−1 s−1。O3−的衰变是通过O3 + O2 + O−的热解离反应进行的，该反应在22℃时的绝对速率常数为6·2±1·2 × 103 s−1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal for Radiation Physics and Chemistry

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