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B-11 3Q MAS NMR Study on Glucose-Responsive Micelles Self-assembled from PEG-b-P(AA-co-AAPBA)  
B-11 3Q MAS NMR Study on Glucose-Responsive Micelles Self-assembled from PEG-b-P(AA-co-AAPBA)
資料類型: PDF文件
關鍵詞: B-11  3Q  MAS  NMR  coordination  glucose-responsiveness  micelles  
self-assembly  
資料大小: 1268k
所屬學科: 高分子物理
來源: 來源網絡
簡介:
Phenylboronic acid (PBA) based glucose-responsive materials have attracted great interests in recent years for developing insulin delivery systems. It is desired to obtain PBA based materials that can response to glucose under physiological pH and understand the mechanism. By using B-11 triple-quantum magic-angle spinning nuclear magnetic resonance (B-11 3Q MAS NMR) measurements, the glucose-responsive mechanism of micelles self-assembled from poly(ethylene glycol)-b-ploy(acrylic acid-co-acrylamidophenylboronic acid) PEG-b-P(AA-co-AAPBA) is deeply investigated. Different configurations of phenylboronic acid during various steps of glucose-responsive behaviors are clearly analyzed in the B-11 3Q MAS NMR spectra and coordination between carboxyl and PBA is confirmed. By increasing the AA units in PEG-b-P(AA-co-AAPBA), the carboxyl can coordinate with PBA moieties and cause the glucose-responsiveness of micelles even in the weak acid environment.
上傳人: sunpingchuan
上傳時間: 2014-05-28 18:40:45
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