物理化学学报 >> 1986, Vol. 2 >> Issue (06): 493-498.doi: 10.3866/PKU.WHXB19860603

研究论文 上一篇    下一篇

香豆素衍生物和β环糊精分子络合过程的稳态和时间分辨荧光研究

张兴康; 陈建新; 万超志; 刘丽; 徐广智; 唐有祺   

  1. 中国科学院 化学研究所; 北京大学 化学系
  • 收稿日期:1985-07-26 修回日期:1985-12-26 发布日期:1986-12-15

FLUORESCENCE INVESTIGATION ON THE COMPLEXATION PROCESS OF COUMARIN-CYCLODEXTRIN SYSTEMS

Zhang Xingkang; Chen Jianxin; Wan Chaozhi; Liu Li; Xu Guangzhi; Tang Youqi   

  1. Institute of Chemistry, Academia Sinica, Beijing; Chemistry Department of Beijing University
  • Received:1985-07-26 Revised:1985-12-26 Published:1986-12-15

摘要: 用稳态和时间分辨荧光光谱法研究某些香豆素衍生物(C_311, C_47, C_102, C_120和C_4)同βCyD在水溶液中的络合过程。观察到这些分子在βCyD水溶液中的荧光峰值兰向位移、强度增加和荧光寿命增大。结果表明CND分子在水溶液中同βCyD分子发生络合作用。测得的CND一βCyD体系的络合常数按下列次序递减; K_311>K_47>K_102>K_120>K_4, 这些事实揭示了客体分子的憎水性及同βCyD分子腔体尺寸医配是影响络合作用的重要因素。

Abstract: The complexation of some Coumarin derivatives(C_(311), C_(47), C_(102), C_(120) and C_4) With β-CyD in aqueous solution has been examined by means of steady-state and time resolved fluorescence methods. It is observed that the fluorescence peaks, relative intensities and lifetimes of the guest molecules in aqueous solution of β- CyD reveal hypsoehromic shift, enhancement and increment respectively relative to those of guest molecules in aqueous solution. The results indicate that the CNDs complex with β-CyD to a certain extent. The measured complexation constants for CND—β-Cye systems decrease in the order of K_311 K_47 K_102 K_120 K_4. These facts reflect that the hydrophobic property of guest molecule and the matching size between the guest molecule and β-CyD are important factors affecting their complexation.