Characterization of aromatic polymers (benzenoid and heterocyclic) by cross-polarization, magic-angle 13C-NMR spectroscopy

1982 ◽  
Vol 20 (7) ◽  
pp. 1697-1707 ◽  
Author(s):  
Charles Eric Brown ◽  
Issam Khoury ◽  
Massimo D. Bezoari ◽  
Peter Kovacic
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Magic Angle ◽  
Cross Polarization ◽  
Aromatic Polymers

Cross-polarization 13C-NMR spectroscopy with ‘magic angle’ spinning characterizes organic matter in whole soils

Nature ◽  
1981 ◽  
Vol 294 (5842) ◽  
pp. 648-650 ◽  
Author(s):  
Michael A. Wilson ◽  
Ronald J. Pugmire ◽  
Kurt W. Zilm ◽  
Kuan M. Goh ◽  
Sammy Heng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Nmr Spectroscopy ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Angle Spinning

scholarly journals CARBOXYMETHYLATION OF POLYSACCHARIDES – A COMPARATIVE STUDY

2020 ◽  
Vol 54 (9-10) ◽  
pp. 835-844
Author(s):  
GABRIEL LARS ◽  
ANTJE TIED ◽  
THOMAS HEINZE
Keyword(s):  
Nmr Spectroscopy ◽  
Caustic Soda ◽  
Comparative Study ◽  
13C Nmr ◽  
Reaction Medium ◽  
13C Nmr Spectroscopy ◽  
Water Soluble

The present study describes the heterogeneous carboxymethylation of xylan,α-1,3-glucan, glucomannan, pullulan, curdlan, galactoglucomannan, and agarose with sodium monochloracetate (SMCA) using iso-propanol as slurry medium in the presence of caustic soda. Using heteropolysaccharides for the carboxymethylation, higher DS values are obtained compared to the DS of homopolysaccharides. The influence of the amount caustic soda in the reaction medium is studied. The characterization of the products obtained is performed by means of 13C-NMR spectroscopy. Carboxymethylation transforms the investigated polysaccharides into water-soluble products.

Characterization of cellulose and cellulose derivatives in solution by high resolution 13C-NMR spectroscopy

1994 ◽  
Vol 19 (1) ◽  
pp. 29-78 ◽  
Author(s):  
Irene Nehls ◽  
Wolfgang Wagenknecht ◽  
Burkart Philipp ◽  
Dorothea Stscherbina
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Cellulose Derivatives
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