Poly oxygen uptake-reaction

Oxygen uptake measurements can give considerable mechanistic information. In normal peroxyl radical reactions the G(02-uptake) will range between 3 x 10 7 and 6 x 10 7 mol J1 (Table 8.2). The lower value will be found when half of the 02 is reformed (for example, the formate system), the higher value when all 02 is consumed during the decay of the peroxyl radicals. As soon as G(02-uptake) exceeds the upper limit of 6 x 10 7 mol J, a chain reaction must prevail [examples are some polymers including poly(U)]. However, there is also the interesting situation that G(02-uptake) is below 3 x 10 7 mol JThis means that some of the radicals do not react with 02. A case in point are the OH-induced reactions of purines (Chap. 10.3). 

Modification of aliphatic mono- and poly-amine sorbents by incorporation of hard oxygen donor ligands, through Schiff s base reaction with carbonyl containing compounds, was found to significantly improve the uptake of Fe(in), known to act as hard acid. ... 

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