Cyclometalated binuclear platinum(II) complexes with an embedded D-A ligand as efficient phosphors for NIR-OLEDs

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED Dyes and Pigments Pub Date : 2025-02-26 DOI:10.1016/j.dyepig.2025.112731

Wengjing Xiong , Yuanyuan Fang , Fanyuan Meng , Cheng Zhang , Keyue Xu , Jialu Liu , Weiguo Zhu

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Abstract

Two novel binuclear platinum(II) complexes with different embedded units and the same donor (D)/acceptor (A) termini of triphenylamine (TPA) and isoquinoline (iq) in the main ligands, (TPAiq)₂Pt₂(μ-C₈OXT)₂ and (TPAniq)₂Pt₂(μ-C₈OXT)₂, were designed and synthesized, in which the embedded units are single bond and naphthylidene, respectively. Remarkable photoluminescent properties were observed with photoluminescent quantum yield of 10.5 % at emission peak of 670 nm for (TPAiq)₂Pt₂(μ-C₈OXT)₂, and 3.7 % at 732 nm for (TPAniq)₂Pt₂(μ-C₈OXT)₂ in the neat films. Their luminescence lifetimes were 840 and 1413 ns, respectively. Meanwhile, the (TPAiq)₂Pt₂(μ-C₈OXT)₂ and (TPAniq)₂Pt₂(μ-C₈OXT)₂ doped polymer light-emitting devices (PLEDs) further displayed deep-red to near-infrared electroluminescent properties at the emission peaks of 678 nm and 712 nm with the maximum external quantum efficiencies of 2.00 % and 0.26 %, respectively. This work demonstrated new insight for designing deep-red to near-infrared platinum complexes by the embedded strategy in the D-A-type ligands to regulate emission spectrum and efficiency for advanced PLED applications.

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嵌入D-A配体的环金属化双核铂（II）配合物作为nir - oled的高效荧光粉

设计并合成了三苯胺（TPA）和异喹啉（iq）的主配体（TPAiq）2Pt2(μ-C8OXT)2和（TPAniq）2Pt2(μ-C8OXT)2两种新型双核铂（II）配合物，其嵌套单元分别为单键和萘。结果表明，（TPAiq）2Pt2(μ-C8OXT)2在670 nm处的光致发光量子产率为10.5%,(TPAniq)2Pt2(μ-C8OXT)2在732 nm处的光致发光量子产率为3.7%。它们的发光寿命分别为840和1413 ns。同时，（TPAiq）2Pt2(μ-C8OXT)2和（TPAniq）2Pt2(μ-C8OXT)2掺杂聚合物发光器件在678 nm和712 nm发射峰处进一步显示出深红至近红外电致发光特性，最大外量子效率分别为2.00 %和0.26%。这项工作为设计深红色到近红外铂配合物提供了新的见解，通过嵌入d - a型配体的策略来调节先进PLED应用的发射光谱和效率。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.