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Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (11): 1382-1384. Previous Articles    

β-环糊精与十四烷基硫酸钠和全氟辛酸钠等摩尔混合体系的相互作用

邢航1，林崇熙1，肖进新*,1,2   

  1. (1北京大学化学与分子工程学院北京分子科学国家实验室 北京 100871)
    (2北京氟乐邦表面活性剂技术研究所 北京 100080)
  • 投稿日期:2007-10-12 修回日期:2008-02-20 发布日期:2008-06-14
  • 通讯作者: 肖进新

Interactions between β-Cyclodextrin and the Equimolar Mixture of Sodium Tetradecyl Sulfate and Sodium Perfluorooctanoate

XING, Hang1; LIN, Shrong-Shi1; XIAO, Jin-Xin*,1,2   

  1. (1 Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871)
    (2 Beijing FLUOBON Surfactant Institute, Beijing 100080)
  • Received:2007-10-12 Revised:2008-02-20 Published:2008-06-14
  • Contact: XIAO, Jin-Xin

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The interactions between β-cyclodextrin (β-CD) and the equimolar mixture of sodium tetradecyl sulfate (STS) and sodium perfluorooctanoate (SPFO) were studied by 1H and 19F NMR. The results showed that β-CD selectively included SPFO to form 1∶1 complexes even though the cmc of STS was remarkably smaller than that of SPFO, i.e. STS was more hydrophobic than SPFO. With the further increase of β-CD concentration, the 1∶1 β-CD/STS complexes were then significantly formed until both 2∶1 complexes of β-CD/STS and β-CD/SPFO were formed simultaneously. As a complement of our previous work, it was noted that when the chain length of sodium alkyl sulfates (C8～C12) was further increased to C14, the extent of selectivity of β-CD to SPFO was further decreased. In other words, SPFO still showed advantage of competition for β-CD to form inclusion complexes due to its rigidity and the better fit to the cavity of β-CD, however, the hydrophobicity of STS showed stronger influence on such selectivity than that of C8～C12.

Key words: cyclodextrin, fluorinated surfactant, selectivity, complex, sodium tetradecyl sulfate