Figure 8: 1H (bottom) and 13C (top) NMR spectra of thermally treated (210°C, 3h, air) oleic acid dissolved in CDCl3 expanded vertically to evidence signals from major (blue) oxidation product with CH-O (74 ppm, 13C and 4.0 ppm, 1H) signals and the minor (red) oxidation products. (insert, R = C17H34)
Untreated oleic acid, dissolved in CDCl3, diffuses with D = (1.7 ± 0.1) x 10-10 m2/s,Figure S 12 . After oxidation, two distinct components: D = 0.01 x 10-10 m2/s and D = 0.08 x 10-10 m2/s were observed,Figure 9 and S15. The slowest component, more than a hundred times slower than untreated oleic (table 2 ), reveals a dramatic increase in molecular size.