Fig. 3
2D-HSQC NMR spectra of the lignin oil obtained from 240 °C, 4 h (DMSO-d6). a Aromatic region. The signals for G and S were found at 112.2/6.71 (G2), 115.0/6.64 (G5), 120.0/6.55 (G6) and 105.4/6.41 (S2,6) ppm, respectively. b Side chain region. The signals for propanol moiety were found at 31.7/2.49, 34.5/1.68 and 60.1/3.40 ppm, respectively