Subject area	Chemistry
More specific subject area	Polysaccharides modification
Type of data	Table, text file, graph, figure
How data was acquired	High-resolution liquid NMR 600 MHz spectrometer of Bruker Avance III (Sweden) with a 5 mm TCI CryoProbe equipped with Z-gradients up to 53 G/cm, and NMR 400 MHz spectrometer of Varian (USA)
Data format	Analyzed
Experimental factors	Sample solutions (20 mg/ml) were prepared with deuterated trifluoroacetic acid (TFA-D) as solvent. TFA-D was also employed as reference: δ 11.50 ppm for proton and δ 164.1 ppm for carbon
Experimental features	Detection temperature was set at 25 °C. Samples were scanned 64 times for 1H NMR spectra measurement, and scanned 1 h for 13C NMR measurement
Data source location	Qingdao, PR China; Wuhan, PR China
Data accessibility	Data is provided in this article