应用化学 ›› 2023, Vol. 40 ›› Issue (2): 236-244.DOI: 10.19894/j.issn.1000-0518.220230

• 研究论文 • 上一篇    下一篇

单、双核含双硫配体金属有机铂磷光材料合成及其OLED应用

陈栎岩1, 赵梓茗1, 陶金琪1, 张玉贞1(), 程刚2, 沈云军1()   

  1. 1.广西民族大学林产化学与工程国家民委重点实验室,南宁 530000
    2.香港大学化学系,香港 999077
  • 收稿日期:2022-07-02 接受日期:2022-11-07 出版日期:2023-02-01 发布日期:2023-02-27
  • 通讯作者: 张玉贞,沈云军
  • 基金资助:
    国家自然科学基金(22165002);广西自然科学基金(AD20238043);广西高校引进海外高层次人才“百人计划”和广西民族大学相思湖青年团队(2020RSCXSHQN01)

Synthesis of Mono- and Binuclear Disulfur-Chelated Organoplatinum(Ⅱ) Complexes and Its OLEDs Application

Li-Yan CHEN1, Zi-Ming ZHAO1, Jin-Qi TAO1, Yu-Zhen ZHANG1(), Gang CHENG2, Yun-Jun SHEN1()   

  1. 1.Key Laboratory of Chemistry and Engineering of Forest Products,State Ethnic Affairs Commission,Guangxi Minzu University,Nanning 530000,China
    2.Department of Chemistry,the University of Hong Kong,Hong Kong 999077,China
  • Received:2022-07-02 Accepted:2022-11-07 Published:2023-02-01 Online:2023-02-27
  • Contact: Yu-Zhen ZHANG,Yun-Jun SHEN
  • About author:yunjunshen@gxmzu.edu.cn
    zhangyuzhen@gxmzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22165002);Guangxi Natural Science Foundation(AD20238043);Guangxi University 100 Talents Plan on Overseas High-Level Talents Introduction and Xiangsihu Young Scholars Innovative Research Team of Guangxi Minzu University(2020RSCXSHQN01)

摘要:

以丙酮为溶剂,无水碳酸钾为缚酸剂,将氯桥二聚体和StpipH配体加热回流,一步合成了双核铂金属化合物Pt2(Stpip)2L(StpipH: 双(二苯基膦硫基)酰胺;LH2:4,6-二苯基嘧啶)及其相应的单核配合物Pt(Stpip)LH。利用核磁共振(1H,31P谱)、高分辨质谱和X射线单晶衍射等对化合物进行表征和结构确认。并通过紫外-可见光吸收光谱和荧光发射光谱研究了化合物的光物理性质。结果表明,双核化合物Pt2(Stpip)2L的低能跃迁吸收带位于400~510 nm的可见光区域,在纯固体状态下,发射峰位于593和559 nm处,其质量分数为2%的PMMA薄膜在560 nm处表现出强烈的磷光发射且在PMMA薄膜中的量子产率达到22.2%。单核化合物Pt(Stpip)LH在纯固体和质量分数为2%的聚甲基丙烯酸甲酯(PMMA)薄膜中,发射峰分别位于524和526 nm处,其中在PMMA薄膜中的量子产率达38.7%。这两种化合物在不同状态下的发光寿命在0.99~2.80 μs之间。将双核化合物Pt2(Stpip)2L应用于发光层,利用溶液法制备了有机发光二极管器件,该器件最大电流效率约为25.50 cd/A,最大功率效率为15.41 lm/W,最大外量子效率为8.19%,色度坐标(CIE)在(0.48,0.50)附近。

关键词: 铂, 磷光化合物, 双核化合物, 有机发光二极管

Abstract:

The binuclear complex of Pt2(Stpip)2L and its corresponding mononuclear complex Pt(Stpip)LH are synthesized in one step by heating the mixture of chloro-bridged Pt(Ⅱ) dimer and StpipH ligand in acetone in the presence of potassium carbonate under reflux condition. The complexes are separated and characterized by 1H and 31P NMR spectroscpy, high resolution mass spectrometry (HRMS) and X-ray single crystal diffraction. The luminescent properties of the complexes are studied by UV-Vis absorption spectrometer and fluorescent emission spectrometer. Among them, a binuclear complex exhibits strong phosphorescence at 593 and 560 nm in neat solid state and 2% PMMA film, respectively, and the quantum yield in PMMA film reaches 22.2%. A mononuclear complex exhibits phosphorescence at 524 and 526 nm in neat solid state and 2% (mass percent) PMMA film, respectively, and the quantum yield in PMMA films reaches 38.7%. The phosphorescence lifetime for both of complexes in two different states are between 0.99~2.80 μs. Organic light-emitting diodes (OLEDs) are fabricated by using the complex Pt2(Stpip)2L as the light-emitting layer. The results show that the maximum current efficiency of the OLEDs is 25.50 cd/A, the maximum power efficiency is 15.41 lm/W, the maximum external quantum efficiency is 8.19%, and the CIE color coordinates are (0.48,0.50)

Key words: Platinum, Phosphorescent complexes, Binuclear complex, Organic light-emitting diodes

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