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Electro-Optic Study of the Conformational Changes Induced in Partially Charged Poly-4-Vinylpyridine by Ions of Heavy Metals

  • M. Tricot

Abstract

We first studied, in aqueous solution, the effect of the degree of charge on the electro-optical parameters and on the conformation of poly-4-vinylpyridine partially quaternized by ethylbromide. We then investigated the influence of CaBr2 and CuBr2, showing that the former salt only acts through the increased ionic strength. On the contrary, the coordination of Cu++ ions on the uncharged pyridine units produces, with increasing ion concentration, an increase of the electric polarizability and a much more pronounced decrease of the optical anisotropy. Birefringence relaxation time and reduced viscosity data display for Ca++ and Cu++ ions a sharp decrease of the extension of the polyelectrolyte. The influence of the degree of charge and of the Cu++ ions attached to the uncharged pyridine units on the electric and optical parameters is tentatively explained on the basis of a segmental chain model and of the polarization of the counterionic atmosphere along rigid subunits.

Keywords

Infinite Dilution Electric Polarizability Optical Anisotropy Induce Dipole Moment Polymeric Ligand 
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References

  1. 1.
    Kirsh Yu E, Kovner V Ya, Kokorin A I, Zamaraev K I, Chernyak V Ya and Kabanov V A, Eur. Polymer J., 10 (1974) 671.CrossRefGoogle Scholar
  2. 2.
    Kokorin A I, Zamaraev K I, Kovner V Ya, Kirsh Yu E and Kabanov V A, Eur. Polymer J. 11 (1975) 719.CrossRefGoogle Scholar
  3. 3.
    Nishikawa H and Tsuchida E, J. Phys. Chem. 79 (1975) 2072.Google Scholar
  4. 4.
    Nishide H and Tsuchida E, Makrom. Chem. 177 (1976) 2295.Google Scholar
  5. 5.
    Nishide H, Deguchi J and Tsuchida E, J. Polymer Sci., Polymer Chem. 15 (1977) 3023.CrossRefGoogle Scholar
  6. 6.
    Tricot M, Houssier C and Desreux V, Eur. Polymer J. 12 (1976) 575.CrossRefGoogle Scholar
  7. 7.
    Fredericq E and Houssier C, “Electric Dichroism and Electric Birefringence”, Oxford University Press, London (1973).Google Scholar
  8. 8.
    Tricot M and Houssier C, in “Polyelectrolytes”, 43–90, Technomic Publ., Westport (1976).Google Scholar
  9. 9.
    Tricot M, Houssier C, Desreux V and Van der Touw F, Biophys. Chem. 8 (1978) in press.Google Scholar
  10. 10.
    Tricot M, Houssier C and Desreux V, Eur. Polymer J. 14 (1978) 307.CrossRefGoogle Scholar
  11. 11.
    Van der Touw F and Mandel M, Biophys. Chem. 2 (1974) 218.CrossRefGoogle Scholar
  12. 12.
    Mandel M, Mol. Phys. 4 (1961) 489.CrossRefGoogle Scholar
  13. 13.
    Van der Touw F and Mandel M, Biophys. Chem. 2 (1974) 231.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • M. Tricot
    • 1
  1. 1.Laboratoire de Chimie-PhysiqueUniversité de LiègeLiegeBelgium

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