Efficient oxidative modification of polysaccharides in water using H2O2 activated by iron sulfophthalocyanine |
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| Authors: | Carmen Klein-Koerkamp, Robert Granet, Rachida Zerrouki, Nicolas Villandier, Fran ois J r me, Joë l Barrault,Pierre Krausz |
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| Affiliation: | aLaboratoire de Chimie des Substances Naturelles, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France;bLaboratoire de Catalyse en Chimie Organique, Université de Poitiers/CNRS, 40 avenue du Recteur Pineau, 86022 Poitiers, France |
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| Abstract: | ![]()
Selective and environmentally friendly oxidation of polysaccharides by hydrogen peroxide in the presence of iron tetrasulfophthalocyanine (FePcS) catalyst was studied in aqueous media. Oxidation under mild conditions led to the cleavage of the C–C bond of vicinal diols of glycoside units as a result of carbonyl and carboxyl formation. Optimized experimental conditions allowed oxidation of hydroxyethylcellulose (HEC), sodium carboxymethylcellulose (NaCMC), guar gum (GG), and inulin to the extent of 19, 30, 53, 23 carbonyl functions per 100 anhydroglucose units, respectively. Possible explanation for this relatively modest conversion is discussed. Over-oxidation phenomena appear to play an important role during the oxidation process. |
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| Keywords: | Iron sulfophthalocyanine Oxidation H2O2 Hydroxyethylcellulose Carboxymethylcellulose Guar gum Inulin |
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