Journal article
Pulse Radiolysis of Adrenaline in Acid Aqueous Solutions
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−1s−1; k(OH + adr.) = (1·65±0·15) × 1010 dm3 mol−1s−1. The H-adduct of adrenaline has two λmax, 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.
Language: | English |
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Year: | 1976 |
Pages: | 533-538 |
ISSN: | 18781179 and 00207055 |
Types: | Journal article |
DOI: | 10.1016/0020-7055(76)90019-X |