Color‐Tunable, Excitation‐Dependent, and Time‐Dependent Afterglows from Pure Organic Amorphous Polymers,Advanced Materials

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Color‐Tunable, Excitation‐Dependent, and Time‐Dependent Afterglows from Pure Organic Amorphous Polymers
Advanced Materials ( IF 27.4 ) Pub Date : 2020-10-21 , DOI: 10.1002/adma.202004768
Xueyu Dou _{1,

2} , Tianwen Zhu ₂ , Zhengshuo Wang _{1,

2} , Wei Sun ₃ , Yueying Lai ₂ , Kunyan Sui ₁ , Yeqiang Tan ₁ , Yongming Zhang ₂ , Wang Zhang Yuan ₂

Affiliation

Achieving persistent room‐temperature phosphorescence (p‐RTP), particularly those of tunable full‐colors, from pure organic amorphous polymers is attractive but challenging. Particularly, those with tunable multicolor p‐RTP in response to excitation wavelength and time are highly important but both fundamentally and technically underexplored. Here, a facile and general strategy toward color‐tunable p‐RTP from blue to orange‐red based on amidation grafting of luminophores onto sodium alginate (SA) chains, resulting in amorphous polymers with distinct p‐RTP and even impressively excitation‐dependent and time‐dependent afterglows is reported. p‐RTP is associated with the unique semi‐rigidified SA chains, effective hydrogen bonding network, and oxygen barrier properties of SA, whereas excitation‐dependent and time‐dependent afterglows should stem from the formation of diversified p‐RTP emissive species with comparable but different lifetimes. These results outline a rational strategy toward amorphous smart luminophores with colorful, excitation‐dependent, and time‐dependent p‐RTP, excellent solution processability, and film‐forming ability for versatile applications.

中文翻译：

纯有机非晶态聚合物的颜色可调，激发依赖性和时间依赖性余辉

从纯有机无定形聚合物中获得持久的室温磷光（p - RTP），尤其是可调谐全色磷光，是有吸引力的，但具有挑战性。特别是，对于激发波长和时间具有可调多色p- RTP的仪器非常重要，但从根本上和技术上都未得到充分开发。在此，基于将发光体酰胺化接枝到海藻酸钠（SA）链上的方法，从蓝到橙红色实现颜色可调的p -RTP的简便且通用的策略，从而得到具有明显p- RTP甚至与激发有关的显着性的无定形聚合物。报告了与时间有关的余辉。p‐RTP与独特的半刚性SA链，有效的氢键网络和SA的氧阻隔特性相关联，而依赖于激发和依赖于时间的余辉应源自形成具有可比性但不同的p‐ RTP发射物种一生。这些结果概述了针对具有彩色，依赖于激发和依赖于时间的p ‐ RTP，出色的溶液加工性和成膜能力的非晶智能发光体的合理策略。

更新日期：2020-11-25

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