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NMR structural studies on polysaccharide derivatives

A new NMR technique has been developed for structural study on versatile polysaccharide derivatives, including cellulose esters and ethers.　Thus a 13-C NMR technique has been applied for peracylated polysaccharide derivatives, in which the acyl carbonyl carbon signal is utilized as a remarkably sensitive structural probe, to provide such a structural information as the detaild substitutent pattern on the monomeric sugar unit.

　References

• Pullulan Nonaacetate; Assignment of Chemical Shifts of the Acetyl Protons and Acetyl Carbonyl Carbons by 2D-NMR Spectroscopy,
  Y. Tezuka, Carbohydr. Res., 305, 155 (1998) [PDF]
  
• 13-C NMR Structural Study on Cellulose Derivatives with Carbonyl Groups as a Sensitive Probe,
  Y. Tezuka, in“Cellulose Derivatives: Modification, Characterization and Nanostructures", Th. Heinze and W. Glasser eds., ACS Symp. Ser. 688, Washington, D.C., p. 163 (1998).
  
• 13-C NMR Determination of Substituent Distribution in Carboxymethylcellulose by Use of Its Peresterified Derivatives,
  Y. Tezuka, Y. Tsuchiya and T. Shiomi, Carbohydr. Res., 291, 99 (1996).