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) . In: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Vol. 198, p. 275-280 (2002) |
Permanent URL |
http://hdl.handle.net/2078.1/70770 |