Orientation of functional groups in polyelectrolyte multilayers studied by second-harmonic generation (SHG)
(2002) Colloids and Surfaces A: Physicochemical and Engineering Aspects — Vol. 198, p. 275-280 (2002)
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- 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.
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Koetse, M., Laschewsky, A., Jonas, A., & Verbiest, T. (2002). Orientation of functional groups in polyelectrolyte multilayers studied by second-harmonic generation (SHG). Colloids and Surfaces A: Physicochemical and Engineering Aspects, 198, 275-280. https://hdl.handle.net/2078.5/270440 (Original work published 2002)