Fig. 5: 2D-HSQC-NMR spectra of poplar lignin and oily products in 4:1 (vol/vol) d6-DMSO/d5-pyridine.
From: Catalytic refining lignin into toluene over atomically dispersed Cu/Ni dual sites
a Lignin side-chain region. b Lignin oil side-chain region. c Lignin aromatic region. d Lignin oil aromatic region.
