• A novel ruthenium(ii) complex for two-photon absorption-based optical power limiting in the near-IR range
    M. Four, D. Riehl, O. Mongin, M. Blanchard-Desce, L.M. Lawson Daku, J. Moreau, J. Chauvin, J.A. Delaire and G. Lemercier
    Physical Chemistry Chemical Physics, 13 (38) (2011), p17304-17312
    DOI:10.1039/c1cp21661a | unige:17238 | Abstract | Article HTML | Article PDF
In this article, the synthesis of a novel high-conjugated ligand and its corresponding Ru(II) complex PTFTF:Ru is reported, along with the linear and nonlinear optical characterizations. Two-photon absorption based optical power limiting properties (OPL), especially in the near infrared, are described and compared to those of the analogous complexes previously published. Combined with a preliminary theoretical approach, this allows us to highlight several key parameters for OPL optimization in such molecular systems and more particularly the spectral overlap between TPA and excited-state absorption.
  • 3MLCT excited states in Ru(II) complexes: Reactivity and related two-photon absorption applications in the near-infrared spectral range
    G. Lemercier, A. Bonne, M. Four and L.M. Lawson Daku
    Comptes Rendus Chimie, 11 (6-7) (2008), p709-715
    DOI:10.1016/j.crci.2007.11.012 | unige:3561 | Article PDF
The synthesis and characterization of new 1,10-phenanthroline-based chromophores LT1, LT2 and LD1 featuring fluorene unit(s) are reported. Their absorption and emission as well as their two-photon absorption properties in the 450–650 nm spectral range are discussed in comparison with the parent 1,10-phenanthroline and already described ligands L1 and L2.



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