Abstract
AbstractChitin is a natural polysaccharide by N‐acetyl‐D‐glucosamine units β(1‐4) linked. In the present work a chitosan with DA 56% and Mv 80.000 g/mol will be employed. Several techniques to obtain sulphate derivatives of chitin and to chitosan have been proposed due to the interesting biological and chemical properties of such as heparin compounds. Among others it could be mentioned their antibactericidal and metal chelating properties. In the present work a new sulfated derivatives of chitosan with potential growth regulator properties were obtained. The reaction was carried out in heterogeneous media using a commercial growth regulator ‐SO3H as sulfating agent. All derivatives were characterized by several spectroscopic techniques. In IR spectra the bands at 1240 cm−1, (S=O stretching) and 860 cm−1, corresponding to S‐O‐C symmetric stretching, are characteristic of sulphates groups. In 1H‐NMR spectra the appearance of functional group signal confirm its structure.
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