Homoleptic tris-cyclometalated platinum(iv) complexes: a new class of long-lived, highly efficient 3LC emittersElectronic supplementary information (ESI) available: Experimental procedures and characterization data. CCDC 953979 and CCDC 953980. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3sc53187b

• Main Authors: Juliá, Fabio, Bautista, Delia, Fernández-Hernández, Jesús M, González-Herrero, Pablo
• Format: Journal Article
• Language: English
• Published: 01.04.2014
• ISSN: 2041-6520; 2041-6539
• DOI: 10.1039/c3sc53187b

The synthesis of meridional and facial isomers of tris-cyclometalated Pt( iv ) complexes, [Pt(C^N) 3 ]OTf, where C^N is a C-deprotonated 2-phenylpyridine-based ligand or 1-phenylpyrazole, is reported for the first time. The facial isomers exhibit high-energy emissions from essentially 3 LC excited states, characterized by lifetimes of hundreds of microseconds and quantum yields up to 0.49 at room temperature in fluid solution, the highest ever found for Pt( iv ) complexes. Stern-Volmer studies demonstrate the high sensitivity of the facial isomers toward oxygen and their electrochemical characterization reveals large redox gaps and a strong oxidizing character in the excited state. Tris-cyclometalated Pt(IV) complexes are reported for the first time. The facial isomers exhibit long-lived 3 LC emissions with quantum yields up to 0.49, the highest ever found for Pt(IV) complexes, combined with a strong oxidizing character in the excited state.