Dual fluorescence of tetraphenylethylene-substituted pyrenes with aggregation-induced emission characteristics for white-light emission†,Chemical Science

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Dual fluorescence of tetraphenylethylene-substituted pyrenes with aggregation-induced emission characteristics for white-light emission†
Chemical Science ( IF 7.6 ) Pub Date : 2018-05-31 00:00:00 , DOI: 10.1039/c8sc01709c
Xing Feng ₁ , Chunxuan Qi ₂ , Hai-Tao Feng ₁ , Zheng Zhao ₁ , Herman H Y Sung ₁ , Ian D Williams ₁ , Ryan T K Kwok ₁ , Jacky W Y Lam ₁ , Anjun Qin ₂ , Ben Zhong Tang _{1,

2,

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Affiliation

This article presents a new strategy to achieve white-light emission from single tetraphenylethylene-substituted pyrenes (TPE-Pys) with aggregation-induced emission (AIE) characteristics. TPE-Pys were synthesized by a Pd-catalyzed coupling reaction of a boronic acid or pinacol ester of pyrene and tetraphenylethylene (TPE) derivatives and showed multicolor emission by introducing different substituents on the phenyl rings of TPE. TPE-Pys with a TPE unit at the 1-position and asymmetric TPE units at 2,7-positions show dual fluorescence in THF/water mixtures to realize white-light emission with CIE coordinates of (x = 0.30 and y = 0.41) and (x = 0.21 and y = 0.16), respectively. The structure–property relationship of TPE-Pys were investigated to elucidate the origin of the white emission. The results showed that due to the weak electronic interaction of pyrene and its chromophoric units at the 2,7-positions and the constraint of the rotation of the TPE unit at the 1-position of pyrene, each component can exhibit its own emission color. The combination of appropriate colors gives rise to white-light emission. Such a principle of molecular design may open a new avenue for preparing advanced multicolor and multifunctional optical materials for organic electronics.

中文翻译：

四苯乙烯取代芘的双荧光，具有白光发射的聚集诱导发射特性†

本文提出了一种新策略，可实现具有聚集诱导发射（AIE）特性的单四苯乙烯取代芘（TPE-Pys）白光发射。 TPE-Pys是通过Pd催化芘的硼酸或频哪醇酯与四苯乙烯(TPE)衍生物的偶联反应合成的，并通过在TPE的苯环上引入不同的取代基而显示出多色发射。 1 位具有 TPE 单元且 2,7 位具有不对称 TPE 单元的 TPE-Pys 在 THF/水混合物中显示出双重荧光，可实现 CIE 坐标（ x = 0.30 和y = 0.41）的白光发射，（ x = 0.21 和y = 0.16）。研究了 TPE-Pys 的结构-性能关系，以阐明白色发射的来源。结果表明，由于芘与其2,7位发色单元的弱电子相互作用以及芘1位TPE单元旋转的限制，各组分可以表现出各自的发射颜色。适当颜色的组合会产生白光发射。这种分子设计原理可能为制备用于有机电子学的先进多色和多功能光学材料开辟一条新途径。

更新日期：2018-05-31

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