化学学报 ›› 1992, Vol. 50 ›› Issue (2): 157-162. 上一篇    下一篇

研究论文

无机盐对β-环糊精空腔微环境影响的荧光探针研究

江云宝;黄贤智;陈国珍   

  1. 厦门大学化学系
  • 发布日期:1992-02-15

A study of the effects of inorganic salts on the microenvironment of β -cyclodextrin with fluorescent probe

JIANG YUNBAO;HUANG XIANZHI;CHEN GUOZHEN   

  • Published:1992-02-15

基于芘的单体荧光光谱振动结构与其所处环境极性的相关性, 研究了碱金属氯化物对β-环糊精(β-CD)空腔微环境的影响。盐类的引入导致β-CD空腔极性减小, 芘/β-CD包络物形成常数增大。结果表明疏水相互作用是包络物形成动力之一; 盐类的引入除改变溶液的离子强度, 还与β-CD分子间存在着特殊的相互作用, 后者是导致环糊精空腔性质变化的根本原因。详细探讨了盐与β-CD分子间的作用本质。

关键词: 影响, 环糊精, 荧光分光光度法, 芘, 空腔, 无机盐, 包络, 碱金属氯化物

The relationship between the ratio of intensity of the third vibronic band to that of the first vibronic band in pyrene monomer fluorescence spectrum and its environmental polarity is used to probe the effects of alkali-metal chlorides MCl(M+ = Li+, Na+, K+) on the microenvironment of b-cyclodextrin (b-CD) cavity. Results reveal that the introduction of the salt decreases the polarity of b-CD cavity and increases the formation constant of pyrene-b-CD inclusion complex. It is indicated that hydrophobic interaction is one of binding forces of inclusion complex and that the salt, other than changing the ionic strength of the solution, interacts with b-CD mol., is the cause for the change in the microenvironment of b-CD cavity. The characteristics of the interaction between salt and b-CD are investigated in detail.

Key words: INFLUENCE, CYCLODEXTRIN, FLUOROSPECTROPHOTOMETRY, PYRENE, CAVITIES, INORGANIC SALT, ENVELOPMENT

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