Synthesis and characterisation of dextran and pullulan sulphate
2001; Elsevier BV; Volume: 331; Issue: 2 Linguagem: Inglês
10.1016/s0008-6215(00)00315-3
ISSN1873-426X
AutoresChristian Mähner, M. D. Lechner, E. H. Nordmeier,
Tópico(s)Polymer Nanocomposites and Properties
ResumoDextrans and pullulans of different molar masses in the range of 104–105 g/mol were sulphated via a SO3–pyridine complex. The degree of substitution achieved was DS=2.4 and DS=1.4 for dextran sulphate and DS=2.0 and DS=1.4 for pullulan sulphate, respectively. Confirmation of sulphation was given by FTIR spectroscopy. Asymmetrical SO and symmetrical COS stretching vibrations were detected at 1260 and 820 cm−1. Reactivity of the polysaccharide C-atoms was determined by 13C NMR spectroscopy: For dextran this was C-3>C-2>C-4, while for pullulan it was C-6>C-3>C-2>C-4.
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