التفاصيل البيبلوغرافية
| العنوان: |
Preparation and Physical Properties of Chitosan Benzoic Acid Derivatives Using a Phosphoryl Mixed Anhydride System. |
| المؤلفون: |
Duckhee Lee, Zhe Shan Quan, Chichong Lu, Jin Ah Jeong, Changhyun Song, Mi-Sun Song, Kyu Yun Chai |
| المصدر: |
Molecules; Feb2012, Vol. 17 Issue 2, p2231-2239, 9p, 1 Black and White Photograph, 1 Diagram, 2 Charts, 1 Graph |
| مصطلحات موضوعية: |
PHOSPHORIC acid, ACYLATION, BENZOIC acid, CHITOSAN, HYDROXYL group, ANHYDRIDES, DIMETHYL sulfoxide |
| مستخلص: |
Direct benzoylation of the two hydroxyl groups on chitosan was achieved using a phosphoryl mixed anhydride system, derived from trifluoroacetic anhydride (TFAA), benzoic acids (BAs), and phosphoric acid (PA). The reaction is operated as a one pot process under mild conditions that does not require neither an inert atmosphere nor dry solvents. The structures of the synthesized compounds were confirmed by NMR and IR spectroscopy. Solubility tests on the products revealed that they were soluble in organic solvents such as N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and acetone. In the meantime, a morphological study by scanning electron microscopy (SEM) evidently indicated that the chitosan benzoates underwent significant structural changes after the benzoylation. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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