Research Progress on Solution-state Nuclear Magnetic Resonance(NMR)Technique for Lignin Structure Characterization
Lignin is a renewable aromatic polymer abundant in nature,and understanding its structural features is of great importance for its valuable utilization.Solution-state nuclear magnetic resonance(NMR)techniques,including 1H,13C,31P,19F,have proven to be powerful analytical tools for characterizing lignin's structural features.This article provided an overview of the advantages of solution-state NMR tech-niques in characterizing various structural features of lignin,such as linkages,functional groups,and chemical composition.Sample prepara-tion methods and considerations for NMR analysis were described,and the research progress of NMR techniques in lignin structural character-ization was outlined,with a focus on their applicability to different lignin structures.This article will aid in the targeted selection of appropri-ate NMR techniques for accurate characterization and analysis of lignin structures,promoting the high-value utilization of lignin.
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