Synthesis of fac-Ir(ppy) sub(3) end-functionalized poly(4-diphenylaminostyrene) using fac-Ir(ppy) sub(2)(vppy) as a single-monomer addition reagent

• Published in: Polymer journal Vol. 45; no. 6; pp. 601 - 605
• Main Authors: Natori, Itaru, Natori, Shizue, Kanasashi, Anna, Tsuchiya, Kosuke, Ogino, Kenji
• Format: Journal Article
• Language: English
• Published: 01.06.2013
• Subjects: Facial; Synthesis
• ISSN: 0032-3896
• DOI: 10.1038/pj.2012.175

The compound fac-Ir(ppy) sub(3) (fac, facial; ppy, 2-phenylpyridyl) end-functionalized poly(4-diphenylaminostyrene) (PDAS) was synthesized by adding fac-Ir(ppy) sub(2)(vppy) (vppy,2-(4-vinylphenyl)pyridyl) to poly(4-diphenylaminostyryl)lithium (PDASLi). In this reaction, fac-Ir(ppy) sub(2)(vppy) acts as a fac-Ir(ppy) sub(3) single-monomer addition reagent for PDASLi. The first fac-Ir(ppy) sub(2)(vppy) molecule readily binds to the carbanion of PDASLi, but the addition of a second fac-Ir(ppy) sub(2)(vppy) molecule to the carbanion on the vinyl group of fac-Ir(ppy) sub(2)(vppy) does not proceed. Thus, fac-Ir(ppy) sub(3) end-functionalized PDAS, which consists of one PDAS molecule and one fac-Ir(ppy) sub(3) molecule, was successfully obtained for the first time.