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Tenkovtsev, A.V. ; Yakimansky, A.V. ; Dudkina, M.M. ; Lukoshkin, V.A. ; Komber, H. ; Häußler, L. ; Böhme, F.
Ionic Complexes of Bis(hydroxyarylidene)alkanones with Strong Polymeric Bases as a New Class of Third-Order Nonlinear Optical Chromophores

Complex formation of various mono- and bis(hydroxyarylidene)alkanones with poly(1,10-decamethyleneacetamidine) in solution and in the solid phase was investigated by UV/vis and NMRspectroscopy. It could be shown that due to the strong basicity of the polyamidine a deprotonation of thechromophores occurred. This resulted in a significant shift of the longest wavelength absorption band ofthe chromophores to higher wavelengths. Additionally, third-order nonlinear optical activity was evidencedon solution cast films. Besides the optical properties, the thermal behavior of the mixtures was alsoinfluenced by the interactions between the polymer and chromophore. An increase of the glass transitiontemperature of the polymer of about 60 K was attributed to an ionic network formation. The complexesshowed good film-forming properties and sufficiently high thermal stability.

Quelle
Macromolecules 34

Seiten
7100-7107

DOI
http://dx.doi.org/10.1021/ma0020234

Erschienen am
October 2001
 
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