Chinese Journal of Organic Chemistry ›› 2022, Vol. 42 ›› Issue (6): 1831-1838.DOI: 10.6023/cjoc202111017 Previous Articles     Next Articles

ARTICLES

双极传输供体-受体(D-A)型铱(III)配合物近红外发光材料的合成及其电致发光性能

曹丽琴a, 杨小琴a, 李茂秋a, 刘琳a, 于俊婷a,*(), 谭华b,*()   

  1. a 湖南科技大学化学化工学院 理论有机化学与功能分子教育部重点实验室 湖南湘潭 411201
    b 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
  • 收稿日期:2021-11-08 修回日期:2022-01-27 发布日期:2022-02-10
  • 通讯作者: 于俊婷, 谭华
  • 基金资助:
    湖湘高层次人才聚集工程-创新团队(2021RC5028); 常州大学材料科学与工程学院、江苏省光电热能量转换材料及应用工程实验室(GDRGCS2020001)

Synthesis and Electroluminescence Properties of Donor-Acceptor (D-A) Type Near-Infrared Iridium(III) Complex Luminescent Materials with Bipolar Transmission Features

Liqin Caoa, Xiaoqin Yanga, Maoqiu Lia, Lin Liua, Junting Yua(), Hua Tanb()   

  1. a Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201
    b Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164
  • Received:2021-11-08 Revised:2022-01-27 Published:2022-02-10
  • Contact: Junting Yu, Hua Tan
  • Supported by:
    Innovation Team of Huxiang High-Level Talent Gathering Engineering(2021RC5028); Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, and the School of Materials and Engineering, Changzhou University(GDRGCS2020001)

In this paper, an auxiliary ligand with bipolar transmission characteristics, namely pic-PSCz, was synthesized by covalently connecting electron transport diphenylsulfone (PS) unit and hole transport carbazole (Cz) unit to picolinic acid (pic), and a bipolar transmission donor-acceptor (D-A) type near-infrared iridium (III) complex (tBuTPA-BTz-Iq)2Ir(pic-PSCz) (tBu is tert-butyl, TPA is triphenylamine, BTZ is benzotriazole and Iq is isoquinoline) was designed and synthesized. Compared with (Piq)2Ir(pic-PSCz), there is about 110 nm red shifted of (tBuTPA-BTz-Iq)2Ir(pic-PSCz) in emission spectra due to the strong D-A effect. Compared with the reported complex (TPA-BTz-Iq)2Irpic, the photophysical and electroluminescent properties of (tBuTPA-BTz-Iq)2Ir(pic-PSCz) were improved by introducing Cz and PS units. Its maximum emission peak is located in the near-infrared region of 716 nm, and a maximum external quantum efficiency (EQEmax) of 0.87% is achieved, which is three times as much as its parent complex (TPA-BTz-Iq)2Irpic (EQEmax is 0.29% @712 nm).

Key words: bipolar transmission, donor-acceptor, near infrared, iridium (III) complex, organic light emitting device