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Synthèse de complexes organométalliques de type Push-Pull et étude de leurs propriétés optiques et électroniques

Abstract : Organometallic molecular systems exhibiting interesting properties, such as non-linear optical (NLO) responses, luminescence and energy photoconversion, are of great interest in the preparation of novel materials with potential applications in opto-electronics, photonics and Dye-Sensitized Solar Cells (DSSC). This manuscript highlights the synthesis, characterization and the second-order NLO properties of new asymmetrical D–π–M–π–A push–pull dialkynyl ruthenium- and platinum-based as well as dialkenyl ferrocene-based complexes. All complexes incorporate pyranylidene ligands as pro-aromatic donor groups (D) and formaldehyde, indane-1,3-dione pyrazine, pyrimidine or pyrimidinium iodide as electron-withdrawing groups (A) separated by the metal fragment and various π-linkers. The second order nonlinear optical (NLO) properties of all complexes were measured by the electric-field-induced second harmonic generation (EFISH) technique and compared to those of their purely organic analogs. All complexes exhibited µβ values, which dramatically increased upon methylation of the pyrimidine group. With the same donor–acceptor group combination, the strongest NLO response was obtained with the ruthenium complexes, which exhibited a remarkably high µβ0 value of 6000.10-48 esu.
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https://tel.archives-ouvertes.fr/tel-02073181
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Submitted on : Tuesday, March 19, 2019 - 4:30:23 PM
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  • HAL Id : tel-02073181, version 1

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Raphaël Durand. Synthèse de complexes organométalliques de type Push-Pull et étude de leurs propriétés optiques et électroniques. Chimie organique. Université Rennes 1, 2018. Français. ⟨NNT : 2018REN1S065⟩. ⟨tel-02073181⟩

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