Fig. 8: Optimized oligomer oxidation.
From: Catalytic carbon–carbon bond cleavage in lignin via manganese–zirconium-mediated autoxidation
a GC-FID quantification of total monomers in the pine oligomers substrate (blue) and oxidation mixture (red) in mmol/g substrate. Error bars indicate the standard deviation from the mean of three replicates. b Oxidation products identified and quantified in the pine oligomer oxidation (yields in mmol/g substrate). c GPC data comparing the molecular weight distribution of the pine oligomers substrate (blue) and pine oligomers oxidation (red). d GC-FID quantification of total monomers in the poplar oligomers substrate (green) and oxidation mixture (pink). Error bars indicate the standard deviation from the mean of two replicates. e Oxidation products identified and quantified in the poplar oligomer oxidation (yields in mmol/g substrate). f GPC data comparing the molecular weight distribution of the poplar oligomers substrate (green) and poplar oligomers oxidation (pink). Numerical data for this fig. are provided in Supplementary Tables 15 and 16. Conditions: substrate, 65 mg; catalyst, 8 wt% Mn(OAc)2•4H2O, 12 wt% Zr(acac)4; solvent, 15 mL acetic acid; O2 loading, 6 bar; time, 1.5 h; temperature, 150 °C.
