کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1388024 982753 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of chitin cycloalkyl ester derivatives and their physical properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis of chitin cycloalkyl ester derivatives and their physical properties
چکیده انگلیسی

A series of acylated chitin derivatives was prepared by reacting chitin in a solution of trifluoroacetic anhydride and each of the cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl carboxylic acids. The degree of O-acyl substitution was in a range of 1.1–1.4 depending upon the nature of the cyclic acid added, as determined by FT-IR analysis. The solubility of the products in the organic solvents of DMF and THF increased with an increase in the cyclic chain length of the carboxylic acid. Thermal gravimetric analysis indicated that the products were stable up to 220 °C for chitin cyclopropanoate and cyclobutanoate, and 250 °C for chitin cyclopentanoate and cyclohexanoate. The surface morphology of the products by scanning electron microscopic analysis revealed porous and globular surface for chitin cyclobutanoate, cyclopentanoate, and cyclohexanoate, contrast to the dense and smooth organization for the cyclopropanoate.

R = Cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 345, Issue 14, 23 September 2010, Pages 2102–2106
نویسندگان
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