Pulse radiolysis of adrenaline in acid aqueous solutions

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI:10.1016/0020-7055(76)90019-X

M. Gohn, N. Getoff, E. Bjergbakke

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引用次数: 2

Abstract

Pulse radiolysis of adrenaline in acid aqueous solutions (pH 1–3) was carried out. The rate constants for the reactions of adrenaline with H and OH were determined: k(H + adr.) = (0·9±0·1) × 10⁹ dm³ mol⁻¹ s⁻¹; k(OH + adr.) = (1·65±0·15) × 10¹⁰ dm³ mol⁻¹ s⁻¹. The H-adduct of adrenaline has two λ_max, at 280 and 355 nm, with ϵ₂₈₀ = 420 m² mol⁻¹ and ϵ₃₅₅ = 390 m² mol⁻¹, which disappears according to a first order reaction, k₁ = 1·4 × 10³ s⁻¹. The spectra formed by OH attack was assigned to the corresponding benzoxy radical with absorption maxima at 285 and 365 nm and ϵ₂₈₅ = 620 m² mol⁻¹ and ϵ₃₆₅ = 105 m² mol⁻¹. Due to the overlapping of the intermediates, no decay kinetics could be obtained.

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肾上腺素在酸性水溶液中的脉冲放射溶解

肾上腺素在酸性水溶液(pH 1-3)中进行脉冲放射溶解。测定了肾上腺素与H、OH反应的速率常数:k(H + adr.) =(0.9±0.1)× 109 dm3 mol−1 s−1;k(OH + adr.) =(1·65±0.15)× 1010 dm3 mol−1 s−1。肾上腺素的h -加合物在280 nm和355nm处有两个λmax，分别为ϵ280 = 420 m2 mol−1和ϵ355 = 390 m2 mol−1，并根据一级反应k1 = 1·4 × 103 s−1消失。OH攻击形成的光谱归属于相应的苯氧基自由基，吸收最大值分别在285和365 nm处，ϵ285 = 620 m2 mol−1和ϵ365 = 105 m2 mol−1。由于中间体的重叠，没有得到衰变动力学。

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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