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Recognition of critical pairs of polycyclic aromatics on crystalline, liquid-crystalline and isotropic regions of silica-supported polymer in HPLC

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Summary

The silica-supported comb-shaped polymer (Sil-ODA18) with a “crystalline-to-isotropic” phase transition showed the characteristic behaviors of both polymeric and monomeric ODS phases. This was examined using a SRM 869 test mixture. Furthermore, Sil-ODA18 exhibited a specific selectivity towards the critical pairs of polycyclic aromatic hydrocarbons (PAHs), such as acenaphthene and fluorene, or benz(a)anthracene and chrysene, or benzo(ghi)perylene, indeno(1,2,3-cd)pyrene and dibenz(a,h)anthracene. The separation of these solutes was controlled by selecting temperature and solvent systems. The selectivity on Sil-ODA18 was also compared with a conventional ODS (octadecylsilyl silica gel) column. The selectivity on a Sil-ODA18 matrix is attributable to an orientation change of the long-chain alkyl substituents on the surface of the silica base material on transition from crystalline to isotropic state.

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Authors and Affiliations

  1. Graduate School of Science & Technology, Kumamoto University, 2-39-1 Kurokami, 860-8555, Kumamoto, Japan

    M. A. Jamil Chowdhury & H. Ihara

  2. Department of Applied Chemistry & Biochemistry, College of Engineering, Kumamoto University, 2-39-1 Kurokami, 860-8555, Kumamoto, Japan

    T. Sagawa & C. Hirayama

Authors
  1. M. A. Jamil Chowdhury
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  2. H. Ihara
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  3. T. Sagawa
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  4. C. Hirayama
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Jamil Chowdhury, M.A., Ihara, H., Sagawa, T. et al. Recognition of critical pairs of polycyclic aromatics on crystalline, liquid-crystalline and isotropic regions of silica-supported polymer in HPLC. Chromatographia 52, 45–50 (2000). https://doi.org/10.1007/BF02490791

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  • DOI: https://doi.org/10.1007/BF02490791

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