Achieving Tunable Organic Afterglow and UV-Irradiation-Responsive Ultralong Room-Temperature Phosphorescence from Pyridine-Substituted Triphenylamine Derivatives,Advanced Materials

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Achieving Tunable Organic Afterglow and UV-Irradiation-Responsive Ultralong Room-Temperature Phosphorescence from Pyridine-Substituted Triphenylamine Derivatives
Advanced Materials ( IF 27.4 ) Pub Date : 2023-04-07 , DOI: 10.1002/adma.202301874
Shengde Xiong ₁ , Yu Xiong _{1,

2} , Deliang Wang ₁ , Yiwen Pan ₁ , Keyao Chen ₁ , Zheng Zhao ₃ , Dong Wang ₁ , Ben Zhong Tang ₃

Affiliation

Amorphous polymers with ultralong room-temperature phosphorescence (RTP) are highly promising for various applications. Particularly, polymer-based RTP materials with multiple functions such as color-tunability or stimulus-response are highly desirable for multilevel anti-counterfeiting but are rarely reported. Herein, a facile strategy is presented to achieve a series of polymer-based RTP materials with ultralong lifetime, multicolor afterglow, and reversible response to UV irradiation by simply embedding pyridine-substituted triphenylamine derivatives into the polymer matrix poly(vinyl alcohol) (PVA) and poly(methyl methacrylate) (PMMA), respectively. Notably, the pyridine group with the capabilities of promoting intersystem crossing and forming hydrogen-bonding interactions is essential for triggering ultralong RTP from the doping PVA system, among which the doping film TPA-2Py@PVA exhibits excellent RTP property with an ultralong lifetime of 798.4 ms and a high quantum yield of 15.2%. By further co-doping with the commercially available fluorescent dye, multicolor afterglow is obtained via phosphorescence energy transfer. Meanwhile, the doped PMMA system exhibits reversible photoactivated ultralong RTP properties under continuous UV irradiation. Finally, potential applications of these doped PVA and PMMA systems with ultralong lifetime, multicolor afterglow, and photoactivated ultralong RTP in multidimensional anti-counterfeiting are demonstrated.

中文翻译：

利用吡啶取代的三苯胺衍生物实现可调谐有机余辉和紫外辐射响应超长室温磷光

具有超长室温磷光（RTP）的非晶聚合物在各种应用中都非常有前景。特别是具有颜色可调或刺激响应等多种功能的聚合物基RTP材料对于多级防伪非常理想，但很少有报道。在此，提出了一种简单的策略，通过简单地将吡啶取代的三苯胺衍生物嵌入聚合物基体聚乙烯醇（PVA）中，获得一系列具有超长寿命、多色余辉和对紫外线辐射可逆响应的聚合物基RTP材料。和聚甲基丙烯酸甲酯（PMMA）。值得注意的是，吡啶基团具有促进系间交叉和形成氢键相互作用的能力，对于触发掺杂PVA体系的超长RTP至关重要，其中掺杂薄膜TPA-2Py@PVA表现出优异的RTP性能，具有798.4 ms的超长寿命和15.2%的高量子产率。通过进一步与市售荧光染料共掺杂，通过磷光能量转移获得多色余辉。同时，掺杂的PMMA体系在连续紫外照射下表现出可逆的光活化超长RTP性能。最后，展示了这些具有超长寿命、多色余辉和光激活超长RTP的掺杂PVA和PMMA体系在多维防伪中的潜在应用。通过磷光能量转移获得多色余辉。同时，掺杂的PMMA体系在连续紫外照射下表现出可逆的光激活超长RTP性能。最后，展示了这些具有超长寿命、多色余辉和光激活超长RTP的掺杂PVA和PMMA体系在多维防伪中的潜在应用。通过磷光能量转移获得多色余辉。同时，掺杂的PMMA体系在连续紫外照射下表现出可逆的光激活超长RTP性能。最后，展示了这些具有超长寿命、多色余辉和光激活超长RTP的掺杂PVA和PMMA体系在多维防伪中的潜在应用。

更新日期：2023-04-07

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