Dipolar Dye Aggregates: A Problem for Nonlinear Optics, but a Chance for Supramolecular Chemistry This work was supported by the Deutsche Forschungsgemeinschaft (Wu 317/1), the Fonds der Chemischen Industrie and BASF AG (travel grant for S.Y.). We thank Dr. Udo Werz for 2D NMR experiments and Prof. Peter Bäuerle for his support.
Abteilung Organische Chemie II Universität Ulm Albert-Einstein-Allee 11, 89081 Ulm (Germany).
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