Direct Observation of NH<sub>2</sub><sup>•</sup> Reactions with Oxygen, Amino Acids, and Melanins
作者:K. Clarke、R. Edge、V. Johnson、E. J. Land、S. Navaratnam、T. G. Truscott
DOI:10.1021/jp076395r
日期:2008.2.1
We report the directobservation of the quenching of the weakly absorbing transient due to the amino radical by oxygen and, hence determine, by a totally direct method, the corresponding rate constant (k = (1.1 +/- 0.1) x 10(9) dm3 mol(-1) s(-1)). We also report the rate constants for the reactions of the amino radical with several amino acids and models of black eumelanin and blond/red phaeomelanin