کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1378423 982000 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient oxidative modification of polysaccharides in water using H2O2 activated by iron sulfophthalocyanine
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Efficient oxidative modification of polysaccharides in water using H2O2 activated by iron sulfophthalocyanine
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 78, Issue 4, 17 November 2009, Pages 938–944
نویسندگان
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