1814
Balcar, Holler, Sedlacek, Blechta:
Copolymers of 3-DEAPPE with 4-NPPE soluble in common solvents such as CHCl3
and THF were prepared with PdCl2 in DMF. The copolymer containing 50% of 4-NPPE
monomeric units has bimodal molecular-weight distribution with major fraction of Mn =
3 000 and minor fraction of molecular weight about 1 . 106; the copolymer containing
30% of 4-NPPE monomeric units has Mn of 3 500. To our knowledge, they are the first
examples of soluble acetylene-type copolymers bearing both nitro and dialkylamino
substituents on pendant groups (the copolymer of 4-nitrophenylacetylene with 4-di-
methylaminophenylacetylene was only partly soluble7). The good solubility of the co-
polymers prepared makes possible a subsequent study of their physical properties (e.g.,
in thin layers).
The authors are indebted to Dr L. Petrusova (J. Heyrovsky Institute of Physical Chemistry, Academy
of Sciences of the Czech Republic, Prague) for IR spectra measurements. Financial support from the
Grant Agency of the Czech Republic (grant No. 203/98/1165) and from the Ministry of Education, Youth
and Physical Training of the Czech Republic (grant No. VS 97103) is gratefully acknowledged.
REFERENCES
1. Bredas J. L., Silbey R. (Eds): Conjugated Polymers. Kluwer Academic Publishers, Dordrecht
1991.
2. Long N. J.: Angew. Chem., Int. Ed. Engl. 1995, 34, 1.
3. Ivin K. J., Mol J. C.: Olefin Metathesis and Metathesis Polymerization. Academic Press, London
1997.
4. Vohlidal J., Sedlacek J., Pacovska M., Lavastre O., Dixneuf P. H., Balcar H., Pfleger J.: Polymer
1997, 38, 3359; and references therein.
5. Russo M. V., Furlani A., D’Amato R.: J. Polym. Sci., Part A: Polym. Chem. 1998, 36, 93.
6. Sedlacek J., Vohlidal J., Cabioch S., Lavastre O., Dixneuf P., Balcar H., Sticha M., Pfleger J.,
Blechta V.: Macromol. Chem. Phys. 1998, 199, 155.
7. Lingren M., Lee H. S., Yang W., Tabata M., Yokota K.: Polymer 1991, 32, 1531.
8. Balcar H., Kalisz T., Sedlacek J., Blechta V., Matejka P.: Polymer 1998, 39, 4443.
9. Choi S. J., Jin S. H., Park J. W., Cho H. N., Choi S. K.: Macromolecules 1994, 27, 309.
10. Kang K. L., Kim S. H., Cho H. N., Choi K. J., Choi S. K.: Macromolecules 1993, 26, 4539.
11. Gal Y. S., Lee W. C., Choi S. K., Kim Y. C., Jung B.: Polym. J. (Tokyo) 1996, 32, 579.
12. Lee W. C., Gal Y. S., Choi S. K.: J. Macromol. Sci., Pure Appl. Chem. 1997, A34, 99.
13. Kminek I., Cimrova V., Nespurek S., Vohlidal J.: Makromol. Chem. 1989, 190, 1025.
14. Balcar H., Dosedlova A., Hanus V., Petrusova L., Matyska B.: Collect. Czech. Chem. Commun.
1984, 49, 1737.
15. Bendall M. T., Pegg D. T.: J. Magn. Reson. 1983, 53, 272.
16. Safir A. L., Novak B. M.: Macromolecules 1995, 28, 5396.
17. Lee W. C., Gal Y. S., Jin S. H., Choi S. J., Lee H. J., Choi S. K.: J. Macromol. Sci., Pure Appl.
Chem. 1994, A31, 737.
Collect. Czech. Chem. Commun. (Vol. 63) (1998)