Trace Ir(Ⅲ) complex enhanced electrochemiluminescence of AIE-active Pdots in aqueous media

• 作者: Hang Gao Hong-Yuan Chen Jing-Juan Xu Nan Zhang Wei Zhao Yang Li Yiwu Quan Yixiang Cheng
• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 715-721
• 页数: 7页
• 语种: 英文

摘要

Trace Ir(Ⅲ) complex enhanced aggregation-induced electrochemiluminescence (AIECL) of poly-tetraphenylethene (pTPE) in aqueous media was investigated for the first time.The poly-TPE end-capped by Ir(Ⅲ) complex (Ir@pTPE) and its corresponding model polymer poly-TPE (Ph@pTPE) could be synthesized by Suzuki coupling polymerization reaction of 1,2-bis(4-bromophenyl)-l,2-diphenylethene (M-1) with 1,2-diphenyl-1,2-bis(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethene (M-2) and the continuous Suzuki coupling end-capped reaction of poly-TPE-pinacol boronate with (pq)2Ir(pico)Br and bromobenzene,respectively.Subsequently,the corresponding Ir@pTPE Pdots and Ph@pTPE Pdots encapsulated with poly(styrene-co-maleicanhydride) (PSMA) could be obtained by nanoprecipitation method.Compared with Ph@pTPE Pdots,the Ir@pTPE Pdots with a trace amount of Ir(Ⅲ) complex (1.34‰ of Ir(Ⅲ) content,wt) could exhibit 9.9-fold enhancement of the electrochemiluminescence (ECL) signal for visual emission.This work provided a novel strategy on designing highly efficient ECL materials based on trace Ir(Ⅲ)-end capping AIE-active polymer dots.