Acta Chimica Sinica ›› 2001, Vol. 59 ›› Issue (5): 793-798. Previous Articles     Next Articles

Original Articles

查尔酮修饰β环糊精与过渡金属离子间相互作用

解宏智;孙照勇;张兴康;吴世康   

  1. 中国科学院感光化学研究所.北京(100101);中国科学院化学研究所.北京 (100080)
  • 出版日期:2001-05-15 发布日期:2001-05-15

Interaction between chalcone -modified β cyclodextrin and transitional metal ions

Xie Hongzhi;Sun Zhaoyong;Zhang Xingkang;Wu Shikang   

  1. Inst Photog Chem, Acad Sinica.Beijing(100101);Inst of Chem, CAS. Beijing(100080)
  • Online:2001-05-15 Published:2001-05-15

A new cyclodextrin deruvatiive (DMAC-CD) was prepared by linking a chalcone moiety to the 6--C position of β-cyclodextrin with an aza -- oxa---alkyl chain. The interaction between DMAC-CD and transitional metal ions were studied by steady state and time ---- resolved fluorescence spectroscopy. The experimental results showed that the complexes of DMAC-CD with metal ions were formed in the aqueous solution due to its self --inclusion conformation, which was in favor of binding metal ions. For this reson, the quenching curve of different metal ions for DMAC-CD all deviated from the stern -Volmer linear relationship owing to the steady state quenching mechanism. The stability constants and fluorescence quenching rate constants were bioth determined, indicating this chalcone ----modified cyclodextrin has a higher sensitivity and selectivity for transitional metal ions, especially for Cu^2+.

Key words: CHALCONE, CYCLODEXTRIN, PHOTOINDUCED, CHARGE TRANSFER, FLUOROSPECTROPHOTOMETRY

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