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

• Published in: Organometallics 2014-09, Vol.33 (18), p.4824-4835
• Main Authors: Norel, Lucie, Di Piazza, Emmanuel, Feng, Min, Vacher, Antoine, He, Xiaoyan, Roisnel, Thierry, Maury, Olivier, Rigaut, Stéphane
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Organic chemistry
• ISSN: 0276-7333; 1520-6041
• DOI: 10.1021/om500059d

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-κ2 N,N′–Ln(TTA)3], trans-[(dppe)2Ru(−CC–bipy-κ2 N,N′–Ln(TTA)3)2], and trans-[Ph–CC–(dppe)2Ru–CC–C6H4–CC–bipy-κ2 N,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.