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

Abstract

The compound fac-Ir(ppy) 3 (fac, facial; ppy, 2-phenylpyridyl) end-functionalized poly(4-diphenylaminostyrene) (PDAS) was synthesized by adding fac-Ir(ppy) 2 (vppy) (vppy,2-(4-vinylphenyl)pyridyl) to poly(4- diphenylaminostyryl)lithium (PDASLi). In this reaction, fac-Ir(ppy) 2 (vppy) acts as a fac-Ir(ppy) 3 single-monomer addition reagent for PDASLi. The first fac-Ir(ppy) 2 (vppy) molecule readily binds to the carbanion of PDASLi, but the addition of a second fac-Ir(ppy) 2 (vppy) molecule to the carbanion on the vinyl group of fac-Ir(ppy) 2 (vppy) does not proceed. Thus, fac-Ir(ppy) 3 end-functionalized PDAS, which consists of one PDAS molecule and one fac-Ir(ppy) 3 molecule, was successfully obtained for the first time. © 2013 The Society of Polymer Science, Japan (SPSJ) All rights reserved.