Abstract
An exciplex forming polyurethane (I) (n≤17), its reference model polyurethane (III), and the monomer model (II) were prepared. The catalyst effects on the synthesis of polyurethane are discussed. From the results of absorption, emission and excitation spectra, the concentration and molecular weight effects on inter- and intramolecular interactions of I in 1,2-dichloroethane were compared with those of II and III. The ratio of exciplex emission intensity (Fe) to monomer emission intensity by pyrenyl groups (Fm) increased with concentration in an intermediate DP region, suggesting the interpolymer association of I in dilute solutions. No such tendency was observed for II and III. Clear differences in I and the analogous polyester IV were found. The maximum broadness of absorption spectra was observed in a medium DP region for I but not for IV. The maximum interpolymer association of I occurred in the lower DP region in contrast to IV. The poor solubility of the polyurethane brought about by hydrogen bonding and the resulting rigid main chain probably account for these differences. The weaker exciplex forming tendency of I than IV was attributed to the participation of DMA in the hydrogen bonding. This was supported by infrared and NMR spectroscopy.
Similar content being viewed by others
Article PDF
References
H. L. Yuan and S. Tazuke, Polym. J., 15, 111 (1983).
S. Tazuke and H. L. Yuan, J. Phys. Chem., 86, 1250 (1982).
S. Tazuke and N. Hayashi, J. Polym. Sci., Polym. Chem. Ed., 16, 2729 (1978).
S. Tazuke and T. Tanabe, Macromolecules, 12, 848 (1979).
N. Mataga and M. Ottolenghi, “Molecular Association,” R. Foster, Ed., Academic Press, New York, 1979, p 24.
S. Tazuke and H. L. Yuan, Chem. Phys. Lett., 92, 81 (1982).
M. Imoto and K. Uno, “Addition Polymerization and Addition Polycondensation,” Kagaku-Dojin, Kyoto, 1972, p 61.
S. Tazuke and H. L. Yuan, Polym. J., 14, 215 (1982).
S. Tazuke and H. L. Yuan, Polym. J., 14, 695 (1982).
H. L. Yuan and S. Tazuke, Preprints, Symposium on photochemistry, Japan, 1981, p 223.
Y. Iwaya and S. Tazuke, unpublished data.
S. Tazuke, H. L. Yuan, K. Sato, and Y. Iwaya, Macromolecules, 14, 267 (1981).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yuan, H., Tazuke, S. Inter- and Intramolecular Interactions of Polymer as Studied by Fluorescence Spectroscopy XVI. Synthesis and Exciplex Emission Properties of Poly[oxy-2,2-(1-pyrenylmethyl (4-N,N-dimethylaminobenzyl)propyleneoxycarbonyl-iminohexamethyleneiminocarbonyl]. Polym J 15, 125–133 (1983). https://doi.org/10.1295/polymj.15.125
Issue Date:
DOI: https://doi.org/10.1295/polymj.15.125