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Chemical Research in Chinese Universities ›› 2002, Vol. 18 ›› Issue (2): 206-210.

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Surface Activities of Calix[4] resorcinarenes Bearing Four Hydrophobic Chains and Its Sol ubilization for Organic Compounds

LI Bo1, Yoshifumi KOIDE1, Kunio ESUMI2   

  1. 1. Toyota Central R & D Labs., Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan;
    2. Departemnt of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjyuku-ku, Tokyo 162, Japan
  • Received:2001-01-06 Online:2002-04-24 Published:2011-08-04

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Abstract: Calix [4] resorcinarenes bearing four hydrophobic side chains (4] Ar-Rn, [4] Ar-Ph, and [4] Ar-N) orient stably on water oil interface and show high solubilization capacities for organic compounds, such as long-chain alcohols, benzene, toluene and dyes. The capacities are high even near the omc of polyalkylated calix [4] resorcinarenes, but the solubilities of organic compounds(solubilizates) decrease with the increase of the size of the solubilizates. [4] Ar-R6, with a chain-length of six carbons, is the most effective among [4] Ar-Rn,[4] Ar-Ph, and [4] Ar-N; 11-fold mol of hexanol is dissolved in 2×10-3 mol/I [4]Ar-R6. Moreover,[4] Ar-Rn bearing four alkyl side chains solubilizes the chain alcohols of the same chain length mostly. The solubilization capacities are presumably brought by inclusion in a large cavity of the polyalkylated calix[4] resorcinarcnes and by an efficient orientation of the solubilizates.

Key words: Calix [4] resorcinarene, Hydrophobic chain, Polyalkylate, Solubilizate