Achieving deep red to near-infrared emission in dinuclear platinum (II) complexes with the donor-π-acceptor-type cyclometalated ligand

IF 2.1 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Organometallic Chemistry Pub Date : 2024-09-06 DOI:10.1016/j.jorganchem.2024.123372

Cheng Zhang , Yuanyuan Fang , Danfeng He , Keyue Xu , Yuzhu Bian , Yiru Li , Wei Sun , Mingsheng Peng , Wenjing Xiong

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Abstract

A novel deep red-emitting dinuclear platinum (II) complex, (TPA2niq)₂Pt₂(C₈OXT)₂, featuring a donor-π-acceptor (D-π-A) type ligand, was synthesized and characterized. Here, TPA2niq represents the 4-(tert-butyl)-N-(4-(tert-butyl)phenyl)-N-(4-(6-(isoquinolin-1-yl)naphthalen-2-yl)phenyl)aniline unit, while C₈OXT was the abbreviation for the bridging ligand 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol. Its photophysical, electrochemical, and electroluminescent characteristics were primarily studied. It was found that (TPA2niq)₂Pt₂(C₈OXT)₂ exhibited a saturated deep red emission with a peak at 686 nm in dichloromethane. Furthermore, the (TPA2niq)₂Pt₂(C₈OXT)₂-doped polymer electroluminescent devices (PLEDs), fabricated through a solution process, exhibited outstanding electroluminescence (EL) properties, with an emission peak at 684 nm, a maximum external quantum efficiency (EQE) of 3.78%, and a maximum radiant emittance of 4478 mW/Sr/m². By incorporating the D-π-A type ligand into the dinuclear platinum (II) complex, the PLEDs achieved efficient deep red emission.

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利用供体-π-受体型环甲基配体实现双核铂(II)配合物的深红至近红外发射

合成并表征了一种新型深红发光双核铂 (II) 配合物 (TPA2niq)2Pt2(C8OXT)2，该配合物具有供体-π-受体（D-π-A）型配体。在这里，TPA2niq 代表 4-(叔丁基)-N-(4-(叔丁基)苯基)-N-(4-(6-(异喹啉-1-基)萘-2-基)苯基)苯胺单元，而 C8OXT 是桥接配体 5-(4-辛氧基苯基)-1,3,4-噁二唑-2-硫醇的缩写。主要研究了它的光物理、电化学和电致发光特性。研究发现，(TPA2niq)2Pt2(C8OXT)2 在二氯甲烷中显示出饱和的深红色发射，峰值在 686 纳米处。此外，通过溶液工艺制作的(TPA2niq)2Pt2(C8OXT)2掺杂聚合物电致发光器件（PLED）具有出色的电致发光（EL）特性，其发射峰值为 684 nm，最大外部量子效率（EQE）为 3.78%，最大辐射发射率为 4478 mW/Sr/m2。通过在双核铂（II）配合物中加入 D-π-A 型配体，聚光发光二极管实现了高效的深红色发射。

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来源期刊

Journal of Organometallic Chemistry 化学-无机化学与核化学

CiteScore

4.40

自引率

8.70%

发文量

221

审稿时长

36 days

期刊介绍： The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds. Organometallic compounds are defined as compounds that contain metal - carbon bonds. The term metal includes all alkali and alkaline earth metals, all transition metals and the lanthanides and actinides in the Periodic Table. Metalloids including the elements in Group 13 and the heavier members of the Groups 14 - 16 are also included. The term chemistry includes syntheses, characterizations and reaction chemistry of all such compounds. Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome. The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences, and of heavier main group elements in organometallic chemistry. The journal also publishes review articles, short communications and notes.