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Published on: March 9, 2021
Quantitative Characterization of Modified Lignin Using Solid-State 13C NMR Spectroscopy
Haruka Sotome-Yukisada1, Kentaro Hiratsuka1, Keiichi Noguchi2
1Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan.
Abstract:
Solid-state 13C nuclear magnetic resonance (NMR) spectroscopy with magic angle spinning (MAS) and direct polarization (DP) techniques is a valuable tool for quantitative and reliable characterization of lignin derivatives, specifically for determining these chemical structures and the degree of substitution upon chemical modification. In this study, the DPMAS 13C NMR spectroscopy was used in a quantitative study of the esterifying reaction in lignin derivatives, which allowed the whole lignin structure to be determined. This quantitative evaluation system using DPMAS 13C NMR spectroscopy can be widely utilized for lignin characterization without a specific chemical treatment or decomposition of lignin.
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