Synthesis and Properties of Near Infrared-emitting Iridium（Ⅲ） Complexes with Auxiliary Ligand Functionalized

CHEN Jun; XU Ying; XU Chao; FAN Wei-xue; YU Jun-ting; TAN Hua

doi:10.37188/CJL.20220114

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Synthesis and Properties of Near Infrared-emitting Iridium（Ⅲ） Complexes with Auxiliary Ligand Functionalized

Synthesis and Properties of Materials | 更新时间：2022-10-19

- Synthesis and Properties of Near Infrared-emitting Iridium（Ⅲ） Complexes with Auxiliary Ligand Functionalized
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 8, Pages: 1217-1226(2022)
- 作者机构：
  
  1.常州大学材料科学与工程学院江苏省光电热能量转化材料与应用工程实验室，江苏常州　213164
  2.湘潭大学化学学院，湖南湘潭　411105
- 作者简介：
- 基金信息：
  
  The Open Project of Jiangsu Photoelectric Thermal Energy Conversion Materials and Application Engineering Laboratory(GDRGCS2020001);Postgraduate Research ＆ Practice Innovation Program of Jiangsu Province(SJCX21_1247)
- DOI：10.37188/CJL.20220114
  CLC： O614
- Published：05 August 2022，
  
  Received：29 March 2022，
  
  Revised：12 April 2022，
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陈俊,徐颖,徐超等.辅助配体功能化铱（Ⅲ）配合物近红外电致发光材料的合成及其性能[J].发光学报,2022,43(08):1217-1226.

CHEN Jun,XU Ying,XU Chao,et al.Synthesis and Properties of Near Infrared-emitting Iridium（Ⅲ） Complexes with Auxiliary Ligand Functionalized[J].Chinese Journal of Luminescence,2022,43(08):1217-1226.
陈俊,徐颖,徐超等.辅助配体功能化铱（Ⅲ）配合物近红外电致发光材料的合成及其性能[J].发光学报,2022,43(08):1217-1226. DOI： 10.37188/CJL.20220114.

CHEN Jun,XU Ying,XU Chao,et al.Synthesis and Properties of Near Infrared-emitting Iridium（Ⅲ） Complexes with Auxiliary Ligand Functionalized[J].Chinese Journal of Luminescence,2022,43(08):1217-1226. DOI： 10.37188/CJL.20220114.

摘要

将烷基芴（Fluorene，FL）基团通过柔性烷基链连接到吡啶甲酸（Picolinic acid，pic）上，合成了辅助配体功能化的供体‐受体（D‐A）型铱配合物近红外电致发光材料（CH

OTPA‐BTz‐Iq）

Ir（pic‐FL）（TPA：Triphenylamine为三苯胺，BTz：Benzotriazole为苯并三唑，Iq：Isoquinoline为异喹啉）。通过对其紫外‐可见吸收光谱和光致发光光谱研究发现，由于主配体中强D‐A作用的CH

OTPA‐BTz结构，配合物具有强分子内电荷转移跃迁（Charge transfer transition，ICT）吸收峰和720 nm左右的光致发光峰。与此同时，（CH

OTPA‐BTz‐Iq）

Ir（pic‐FL）分子中柔性烷基链和高荧光量子效率芴基团的引入，可以提高材料光致发光效率，改善材料的溶解性能和器件成膜性能，提高电致发光效率。以配合物为发光掺杂剂制备的有机电致发光器件其最大发射峰位于722 nm左右的近红外区域，最大外量子效率（EQE

max

）为0.92%，是其母体配合物（CH

OTPA‐BTz‐Iq）

‐Irpic器件效率的2.24倍（EQE

max

为0.41%@723 nm）。

Abstract

In this paper， a novel auxiliary ligand functionalized donor-acceptor（D-A） type near infrared-emitting iridium（Ⅲ） complex （CH

OTPA-BTz-Iq）

Ir（pic-FL） was synthesized by connecting alkylfluorene（FL） to picolinic acid（pic）. Through the study of UV-Vis absorption and photoluminescence spectrum， the complex has a strong intramolecular charge transfer transition （ICT） absorption peak and a photoluminescence peak about 720 nm due to the strong D-A effect of the CH

OTPA-BTz-Iq ligand. Furthermore， the photoluminescence and electroluminescent properties of （CH

OTPA-BTz-Iq）

Ir（pic-FL） were improved by introducing alkyl chains and FL group with high fluorescence quantum efficiency， good solubility and film forming performance. In （CH

OTPA-BTz-Iq）

Ir‐（pic-FL）-based OLEDs， a maximum external quantum efficiency （EQE

max

） of 0.92% at 722 nm was obtained， which is much superior than that of the （CH

OTPA-BTz-Iq）

Irpic-based OLEDs （0.41% at 723 nm）.

关键词

铱（Ⅲ）配合物芴供体-受体近红外电致发光

Keywords

iridium（Ⅲ） complexfluorenedonor-acceptornear infraredelectroluminescence

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