物理化学学报 >> 2002, Vol. 18 >> Issue (07): 604-608.doi: 10.3866/PKU.WHXB20020707

研究论文 上一篇    下一篇

萘磺酸盐与β-环糊精衍生物的包结行为

刘立华;龚竹青;郑雅杰;张钦发;关鲁雄   

  1. 中南大学冶金物理化学研究所;中南大学化学化工学院,长沙 410083
  • 收稿日期:2001-12-21 修回日期:2002-02-25 发布日期:2002-07-15
  • 通讯作者: 刘立华 E-mail:LiuLiHua@sina.com.cn

Inclusion Behaviors of Naphthalenesulfonate with β-Cyclodextrin Derivative

Liu Li-Hua;Gong Zhu-Qing;Zheng Ya-Jie;Zhang Qin-Fa;Guan Lu-Xiong   

  1. Metallurgical Physical Chemistry Institute, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083
  • Received:2001-12-21 Revised:2002-02-25 Published:2002-07-15
  • Contact: Liu Li-Hua E-mail:LiuLiHua@sina.com.cn

摘要: 以自组装方式在石英晶体谐振器的金电极表面修饰末端含巯基的β环糊精衍生物(βCDd),用石英晶体微天平(QCM)在线监测α、β萘磺酸盐与之发生包结反应的过程,探讨了温度、浓度、取代基位置对包结反应稳定常数Kin和速率常数ka的影响.从理论上推导并通过实验验证了Kin和ka所遵从的关系式.结果表明:所形成的包结配合物中βCDd与萘磺酸盐的化学计量均为1:1;包结配位反应过程符合Langmuir吸附模型;取代基在萘环上的位置对Kin和ka有很大影响,说明不同取代位置的萘磺酸盐与βCDd的包结行为存在明显差异.

关键词: 石英晶体微天平(QCM), β环糊精含硫衍生物, 萘磺酸盐, 包结行为

Abstract: The thiolterminated βcyclodextrin derivative(βCDd) was attached to the surface of gold electrode of quartz crystal resonator by selfassembly. The inclusion reactions of αnaphthalenesulfonate and βnaphthalenesulfonate with βCDd were monitored in situ by using quartz crystal microbalance (QCM). The influences of temperature, concentration, and the substituting position on naphthalene nucleus on the inclusion constant(Kin) and the rate constant(ka) were investigated. The relational expressions of Kin and ka were deduced theoretically and were testified by experimental results. The results obtained indicated that the stoichiometry of the inclusion complexes formed is 1:1 for the host βCDd with naphthalenesulfonate, that the inclusion reactions tallied the Langmuir adsorption model, that the substituting position on naphthalene nucleus has great effect on Kin and ka , and that the inclusion behaviors of the two derivatives with substituent at different positions with βCDd show obvious difference.

Key words: Quartz crystal microbalance (QCM), Thiolterminated cyclodextrin derivative (β-CDd), Naphthalenesulfonate, Inclusion behavior