Koetse, M
Laschewsky, A.
Jonas, Alain M.
[UCL]
Verbiest, T.
The orientation of polymer bound. NLO-active dye disperse red in alternating polyelectrolyte multilayers was investigated by second harmonic generation. Film growth was followed by UV/Vis spectroscopy, and films were probed for internal order and roughness by small angle X-ray reflectivity. The orientation of the dyes was followed in-situ using Second Harmonic Generation (SHG). Some chromophore orientation was observed for most systems, which however. typically passes over a maximum with ongoing film growth. The intensity of the SHG could not be correlated with the molecular structure of the polymers employed. Surprisingly, heating/drying of certain films increased the SHG activity substantially. Attempts were made to increase and to stabilize the orientation of the chromophores by inclusion complexation with a charged cyclodextrin. (C) 2002 Elsevier Science B.V. All rights reserved.
Bibliographic reference |
Koetse, M ; Laschewsky, A. ; Jonas, Alain M. ; Verbiest, T.. Orientation of functional groups in polyelectrolyte multilayers studied by second-harmonic generation (SHG).9th International Conference on Organized Molecular Films (LB9) (POTSDAM(Germany), Aug 27-sep 01, 2000). In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 198, p. 275-280 (2002) |
Permanent URL |
http://hdl.handle.net/2078.1/61801 |