Polymer Effect on Molecular Recognition. Enhancement of Molecular-Shape Selectivity for Polycyclic Aromatic Hydrocarbons by Poly(acrylonitrile).

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  • Takafuji Makoto
    Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
  • Dong Wei
    Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
  • Goto Yoshihiro
    Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
  • Sakurai Toshihiko
    Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
  • Nagaoka Shoji
    Kumamoto Industrial Research Institute
  • Ihara Hirotaka
    Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University

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Abstract

Poly(acrylonitrile) immobilized onto porous silica (Sil-ANn) was prepared to evaluate the effect of polymerization degree of poly(acrylonitrile) on selective interaction with polycyclic aromatic hydrocarbons. The HPLC using the packed column (Sil-ANn) and an aqueous solution as a mobile phase showed higher selectivity for structural isomers of polycyclic aromatic hydrocarbons compared with simply cyanopropylated silica (Sil-CN) and alkylated silica (Sil-C4). It was considered that silica-supported poly(acrylonitrile) recognized molecular aromaticity of π-electron containing compounds rather than molecular hydrophobicity. Furthermore, similar results were obtained in the selectivity towards geometrical isomers such as trans- and cis-stilbenes or triphenylene and o-terphenyl and structural isomers such as o-, m-, p-terphenyls. Also the separation factors increased with an increase in polymerization degree of ANn. This paper discusses that polymeric structures enhance the selectivity.

Journal

  • Polymer Journal

    Polymer Journal 34 (6), 437-442, 2002

    The Society of Polymer Science, Japan

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