Berlin 2005 – wissenschaftliches Programm

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SYOO: Organic Optoelectronics and Photonics

SYOO 6: Poster

SYOO 6.46: Poster

Montag, 7. März 2005, 18:00–20:00, Poster TU A

CT interaction induced optical nonlinearities — •Mark Goebel¹, Mounaim Deghmouche¹, Boris Traber², Ahmed El-Khawaga³, Lisa Korst¹, and Rüdiger Wortmann¹ — ¹TU Kaiserslautern — ²Ruprecht-Karls-Universität Heidelberg — ³University of Assiut, Egypt

Second-order optical nonlinearities of organic materials are largely controlled by the charge-transfer properties of molecular chromophores. Charge-transfer may occur between a donor and an acceptor group in an intramolecular CT band, typically through a pi-conjugated system, or in an intermolecular (through-space) CT band. Quantitative relationships between molecular second-order polarizabilities and CT properties for both are established on the basis of consistent electric-field-induced second-harmonic generation (EFISHG), hyper-Rayleigh scattering (HRS) and electrooptical absorption measurements (EOAM). Results for a series of one and two-dimensional NLO chromophores including nondipolar structures with threefold symmetry, molecular CT complexes, supramolecular aggregates and phases with chemical reactions will be presented.

[1] R. Wortmann, K. Lukaszuk, Nonlinear Optical Responses of Molecules, Solides and Liquides: Methods and Applications, (2003) 179-193.

[2] B.Traber, J.J. Wolff, F. Rominger, T.Oeser, R.Gleiter, M.Goebel, R. Wortmann, Chemistry-A. European Journal, 10 (2004) 1227-1238.

[3] B. Traber, T. Oeser, R. Gleiter, M.Goebel, R. Wortmann, Eur. J. Org. Chem. (2004), 4387-4390.