Highly efficient hydrolysis of phosphodiester by a copper(II)-chelated chitosan magnetic nanocarrier

Yang Chuang Chang, Dong Hwang Chen

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

A novel heterogeneous magnetic nanocatalyst was designed by conjugating copper(II) ions with chitosan-bound magnetic nanocarrier. Its hydrolytic activity for phosphodiesters was evaluated by investigating the hydrolysis of secondary ester bis-(nitrophenyl) phosphate (BNPP) in aqueous media. The maximum hydrolysis rate of BNPP was observed around the pKa of nanocatalyst which was found to be 12. The kinetic studies revealed that the binding affinity of BNPP to the copper(II)-chelated chitosan magnetic nanocarrier was low as compared to other catalyst systems. However, the rate constants (kcat) and maximum reaction rate (Vmax) were found to be higher with lower activation energy for the developed nanocatalyst. Moreover, the developed nanocatalyst was magnetically recoverable and also had good reusability.

原文English
頁(從 - 到)601-605
頁數5
期刊Reactive and Functional Polymers
69
發行號8
DOIs
出版狀態Published - 2009 8月

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 環境化學
  • 生物化學
  • 一般化學工程
  • 聚合物和塑料
  • 材料化學

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