1H NMR SPECTRA OF LIGNIN MODEL COMPOUNDS

Paper i proceeding, 2009

1H NMR spectral data for lignin model compounds are of interest in connection with the interpretation of NMR spectra of lignins recorded by 1D (1H NMR) and certain 2D spectroscopic techniques. A database comprising such spectral data is being created. Derivatization influences the peak positions in the 1H NMR spectra of lignin models to a large extent. Similarly, an exchange of solvent often results in dramatic shifts of peak positions. Solvent and derivatization effects can be employed for the interpretation of lignin spectra in structural terms. Stereochemistry strongly influences the position of signals in 1H NMR spectra. This offers a possibility to elucidate the stereochemistry of the structural elements in lignins based on 1H NMR spectral data of model compounds.