Oligosaccharides relaxation rates

The first observations on the stereochemical dependence of spin-lattice relaxation-rates of carbohydrate molecules, beginning in " 1972, provided a general survey of the nonselective relaxation-rates of the anomeric protons of monosaccharide derivatives, oligosaccharides, and some polysaccharides. 

Nonselective Spin-Lattice Relaxation Rates (s )° for the Anomeric Protons of Disaccharides, Oligosaccharides, and Polysaccharides... 

Nonselective spin-lattice relaxation rates (s ) for the anomeric protons of selected oligosaccharides are listed in O Table 4. 

It is assumed that all of the relaxation processes with apparent time constants of 10 m.sec. to 2 sec. derive from water protons. In the case of samples containing large amounts of liquid fat, dissolved oligosaccharides or amino acids, this may not be the case, since C-H proton relaxation rates fall within this range. Some other measurement (e.g. integration of the high resolution spectrum) may be necessary to correct for this potentially major source of error. 

Reviews have been published on the use of spin-lattice relaxation rates in the structural analysis of carbohydrate molecules in solution" and on the application of 2D n.m.r. spectroscopy to the structural analysis of oligosaccharides and other complex carbohydrates. ... 

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