摘要
将具有电子传输性能的二苯砜基团(PS)和空穴传输性能的咔唑(Cz)基团共价连接到吡啶甲酸(pic)上,合成了具有双极传输特性的辅助配体pic-PSCz,并构筑了一种双极传输的供体-受体(D-A)型铱(Ⅲ)配合物(t BuTPA-BTzIq)2Ir(pic-PSCz)(t Bu为叔丁基,TPA为三苯胺,BTz为苯并三唑,Iq为异喹啉)近红外电致发光材料.通过紫外-可见吸收光谱和光致发光光谱研究发现,相比于配合物(Piq)2Ir(pic-PSCz),(t BuTPA-BTz-Iq)2Ir(pic-PSCz)由于分子内较强的D-A作用,其发射光谱红移约110 nm.与已报道的配合物(TPA-BTz-Iq)2Irpic相比,(t BuTPA-BTz-Iq)2Ir(pic-PSCz)分子内引入Cz和PS基团,可以有效提高其电致发光效率,其器件最大发射峰位于716 nm,最大外量子效率(EQE_(max))为0.87%,为(TPA-BTz-Iq)2Irpic器件效率的3倍(EQE_(max)为0.29%@712 nm).
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(t BuTPA-BTz-Iq)2Ir(pic-PSCz)(t Bu 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(t BuTPA-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(t BuTPA-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(EQE_(max))of 0.87%is achieved,which is three times as much as its parent complex(TPA-BTz-Iq)2Irpic(EQE_(max) is 0.29%@712 nm).
作者
曹丽琴
杨小琴
李茂秋
刘琳
于俊婷
谭华
Cao Liqin;Yang Xiaoqin;Li Maoqiu;Liu Lin;Yu Junting;Tan;Hua(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;Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications,School of Materials Science and Engineering,Changzhou University,Changzhou,Jiangsu 213164)
出处
《有机化学》
SCIE
CAS
CSCD
北大核心
2022年第6期1831-1838,共8页
Chinese Journal of Organic Chemistry
基金
湖湘高层次人才聚集工程-创新团队(No.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(No.GDRGCS2020001)资助项目.
