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首页> 外文期刊>Advanced Functional Materials >Antiphotobleaching: A Type of Structurally Rigid Chromophore Ready for Constructing Highly Luminescent and Highly Photostable Europium Complexes
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Antiphotobleaching: A Type of Structurally Rigid Chromophore Ready for Constructing Highly Luminescent and Highly Photostable Europium Complexes

机译：抗光漂白：一种结构刚性发色团，可用于构建高度发光和高度光稳定的Euro络合物

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摘要

Antiphotobleaching is a critical challenge in the field of luminescent lanthanide complexes (LLCs) as well as in many disciplines concerning organic luminescent processes. In this work, a type of structurally rigid organic ligand, 4-hydroxy-1,5-naphthyridine (ND), is developed, which can not only efficiently sensitize the europium emission but also demonstrate unique photostability. A series of ND derivatives with different substituent groups are synthesized and their singlet and triplet excited state energy levels are systematically investigated. Photophysical characterizations of the corresponding europium complexes reveal that the sensitization efficiencies ((sens)) are close to 100% and the total photoluminescence quantum yields can reach up to 84%. Most importantly, these structurally rigid luminescent europium complexes exhibit outstanding photostability and thermostability. Unlike the widely used -diketone complexes that are easily photodegraded, ND-based chelates show no obvious degradation during the UV aging test (10 W m(-2) 340 nm Ultraviolet A irradiation) within 200 h. Such superior UV resistance is even better than that of the famous compound tris(8-hydroxyquinolate)aluminum (Alq(3)). Possible reasons are discussed and a general rule for designing photostable LLCs is proposed. Such a chromophore is very promising for introducing luminescent materials with good photostability in potential application in many disciplines.
机译：在发光镧系元素络合物（LLC）领域以及有关有机发光过程的许多学科中，抗光漂白是一个关键的挑战。在这项工作中，开发了一种结构上刚性的有机配体4-羟基-1,5-萘啶（ND），它不仅可以有效地敏化emission的发射，而且还表现出独特的光稳定性。合成了一系列具有不同取代基的ND衍生物，并系统地研究了它们的单重态和三重态激发态能级。相应的complex配合物的光物理特征表明，敏化效率（（感））接近100％，总的光致发光量子产率可达到84％。最重要的是，这些结构刚性的发光euro络合物表现出出色的光稳定性和热稳定性。与容易被光降解的广泛使用的-二酮配合物不同，基于ND的螯合物在200小时内的UV老化测试（10 W m（-2）340 nm紫外线A照射）过程中没有显示出明显的降解。如此优异的抗紫外线性甚至优于著名的化合物三（8-羟基喹啉）铝（Alq（3））。讨论了可能的原因，并提出了设计光稳定LLC的一般规则。这种生色团对于在许多领域的潜在应用中引入具有良好光稳定性的发光材料非常有前途。

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  • 来源
    《Advanced Functional Materials》 |2016年第13期|2085-2096|共12页
  • 作者

    Wei Huibo; Zhao Zifeng; Wei Chen; Yu Gang; Liu Zhiwei; Zhang Bin; Bian Jiang; Bian Zuqiang; Huang Chunhui;

  • 作者单位

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

    Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;

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  • 关键词

    luminescent lanthanide complexes; photobleaching; photostability; naphthydrines; sensitizations;

    机译：发光镧系配合物;光漂白;光稳定性;萘酚;敏化;

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