Lanthanide Sensitization with Ruthenium Carbon-Rich Complexes and Redox Commutation of Near-IR Luminescence

Lucie Norel (1) , Emmanuel Di Piazza (1) , Min Feng (1) , Antoine Vacher (1) , Xiaoyan He (1) , Thierry Roisnel (1) , Olivier Maury (2) , Stéphane Rigaut (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 LC - Laboratoire de Chimie - UMR5182

With the help of associations between Eu3+, Yb3+, and Nd3+ ions and low-potential redox-active ruthenium carbon-rich complexes bearing bipyridine chelating unit(s) of the type trans-[Ph–C≡C–(dppe)2Ru–C≡C–bipy-κ2N,N′–Ln(TTA)3], trans-[(dppe)2Ru(−C≡C–bipy-κ2N,N′–Ln(TTA)3)2], and trans-[Ph–C≡C–(dppe)2Ru–C≡C–C6H4–C≡C–bipy-κ2N,N′–Yb(TTA)3], we built new original d–f heterometallic complexes. Efficient sensitization in the visible range of the Nd3+ and Yb3+ near-infrared (NIR) emitters was achieved with the metal–acetylide antenna, while sensitization of the Eu3+ ion was not efficient owing to the low energy level of the antenna excited state. The redox properties of these groups also allow for low-potential redox modulation of NIR luminescence of the Yb3+ ion and, for the first time, of the Nd3+ ion.

Domaines: Chimie organique

Lucie Norel, Emmanuel Di Piazza, Min Feng, Antoine Vacher, Xiaoyan He, et al.. Lanthanide Sensitization with Ruthenium Carbon-Rich Complexes and Redox Commutation of Near-IR Luminescence. Organometallics, 2014, 33 (18), pp.4824-4835. ⟨10.1021/om500059d⟩. ⟨hal-01151676⟩