Supramolecular Assembly-Induced Emission Enhancement Vesicles Regulated by Pincer-Like Hosts Containing Pillar[5]arenes,Advanced Optical Materials

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Supramolecular Assembly-Induced Emission Enhancement Vesicles Regulated by Pincer-Like Hosts Containing Pillar[5]arenes
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2022-08-22 , DOI: 10.1002/adom.202201496
Jia‐Lin Yu ₁ , Ming‐Xue Wu ₁ , Zhi‐Yuan Xue ₁ , Qing‐Qing Xia ₁ , Xiaomin Liu ₁ , Xing‐Huo Wang ₁

Affiliation

Supramolecular assembly-induced emission enhancement (SAIEE) systems have been proved to be a highly efficient approach for the fabrication of luminescent nanoparticles with uniform morphology. Herein, fluorescent supramolecular vesicles are constructed from tetraphenylethene-based cyano-alkane tetramer (TPE-(CN)₄) and pincer-like hosts containing two pillar[5]arene units (B-(TAP[5]A)₂) through a synergistic effect of host–guest interactions and hydrophobic interactions. Notably, the emission intensity of supramolecular vesicles can be remarkably enhanced with quantum yield determined to be 37.69%, whereas that of TPE-(CN)₄ is only 18.93% in mixture solvent. Furthermore, the supramolecular vesicles can retard the photocyclization reaction of TPE-(CN)₄ under UV light and exhibit considerable emission intensity at high temperature. Enthused by the above results, artificial light-harvesting systems with high antenna effect of 18.7 are facilely established by introducing cyano-vinyl derivatives (CV-CN) as donor, demonstrating the adjustable emission wavelength through Förster resonance energy transfer in the present SAIEE systems. Taking advantage of the tunable emission colors, fluorescent ink based on supramolecular vesicles is successfully prepared, setting the basis for potential application in security painting. As a proof-of-concept study, the pincer-like host facilitates the optical performance of chromophores with aggregation-induced emission feature, and unlocks more possibilities for the establishment of SAIEE systems in aqueous.

中文翻译：

含柱[5]芳烃的钳状主体调控的超分子组装诱导发射增强囊泡

超分子组装诱导发射增强 (SAIEE) 系统已被证明是制造具有均匀形态的发光纳米粒子的高效方法。在此，荧光超分子囊泡由基于四苯乙烯的氰基烷烃四聚体 (TPE-(CN) _{4 ) 和含有两个柱 [5] 芳烃单元 (B-(TAP[5]A)}₂ ) 的钳状主体通过主客体相互作用和疏水相互作用的协同效应。值得注意的是，超分子囊泡的发射强度可以显着提高，量子产率确定为 37.69%，而 TPE-(CN) ₄在混合溶剂中的发射强度仅为 18.93%。此外，超分子囊泡可以延缓 TPE-(CN) 的光环化反应₄在紫外光下，在高温下表现出相当大的发射强度。受上述结果的鼓舞，通过引入氰基乙烯基衍生物 (CV-CN) 作为供体，轻松建立了具有 18.7 高天线效应的人工光捕获系统，证明了在本 SAIEE 系统中通过 Förster 共振能量转移可调节发射波长。利用可调谐的发射颜色，成功制备了基于超分子囊泡的荧光油墨，为防伪涂料的潜在应用奠定了基础。作为一项概念验证研究，钳状宿主促进了具有聚集诱导发光特征的发色团的光学性能，并为在水相中建立 SAIEE 系统开启了更多可能性。

更新日期：2022-08-22

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