Carbon-13 NMR spectra of lignins. 9. Spin-lattice relaxation times (T1) and determination of interunit linkages in three hardwood lignins (Alnus glutinosa, Corylus avellanus and Acer pseudoplatanus)

Nimz, Horst H.Nemr, MichelSchmidt, PeterMargot, ChristianSchaub, BrunoSchlosser, Manfred2006-03-032006-03-032006-03-03198210.1080/02773818208085141https://infoscience.epfl.ch/handle/20.500.14299/226803The spin-lattice relaxation time (T1) for the aliph. C atoms in the C3 side chains of acetylated MWL from C. avellana was below 0.5 s, while C atoms of substituted arom. carbonyl and Me in methoxy and Ac groups lead to T1 values ranging between 1 and 3 s as detd. by the progressive satn. pulse Fourier transform technique. The 13C NMR spectroscopy off acetylated MWL from A. glutinosa, C. avellana and A. pseudoplatanus permitted tracing 5 interunite linkages in each lignin. [on SciFinder (R)]Nuclear magnetic resonance (carbon-13of acetylated MWLfrom Acer pseudoplatanusAlnus glutinosa and Corylus avellana)acetylated MWL interunit linkage detn; spin lattice relaxation time MWL; alderwood MWL spin lattice relaxation; hazelwood MWL spin lattice relaxation; maplewood MWL spin lattice relaxationCarbon-13 NMR spectra of lignins. 9. Spin-lattice relaxation times (T1) and determination of interunit linkages in three hardwood lignins (Alnus glutinosa, Corylus avellanus and Acer pseudoplatanus)text::journal::journal article::research article