AIE 和 ACQ 材料之间的分子间相互作用带来有趣的光学特性,Advanced Optical Materials

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AIE 和 ACQ 材料之间的分子间相互作用带来有趣的光学特性
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-04-25 , DOI: 10.1002/adom.202203075
Zhichao Gong ₁ , Xuejiao Rong ₁ , Guomin Sui ₁ , Xu Jiang ₁ , Mengya Xu ₁ , Chenyu Wang ₁ , Shuxian Meng ₁

Affiliation

为了利用聚集诱导发射（AIE）和聚集引起猝灭（ACQ）材料各自的优势，本文采用了一种独特的方法，即四苯乙烯和三苯胺（经典AIE）、硼二吡咯亚甲基和苯并噻二唑（经典ACQ））选择通过简单的复合方法构建AIE@ACQ双分子体系，重点研究其对荧光、光热治疗、磷光、光动力治疗等光学性质的影响。首先，初步找到了系统的运行机制和规律。首先，AIE和ACQ必须分别具有电子受体和电子供体，形成分子间推拉结构，以保证两个分子彼此靠近，并且分子间π - π堆积相互作用将最高占据分子轨道和最低未占据分子轨道分开，以减少 Δ E _st，从而产生有趣的光学特性。其次，AIE和ACQ之间的共轭结构的匹配程度也是一个重要因素。利用这些体系，发现不同的结构组成具有不同的光学协同性质，因此可以根据实际需要构建不同的AIE@ACQ双分子体系，具有高效、便捷的优点，为联合应用提供了新思路AIE 和 ACQ。

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Intriguing Optical Properties due to the Intermolecular Interaction between AIE and ACQ Materials

To take advantage of the respective strengths of aggregation-induced emission (AIE) and aggregation-caused quenching (ACQ) materials, in this paper a unique approach is taken which is that tetraphenylethene and triphenylamine (classical AIEs), borondipyrromethene and benzothiadiazole (classical ACQs) are selected to construct AIE@ACQ bimolecular systems by simple compounding method, focusing on the effects on optical properties such as fluorescence, photothermal therapy, phosphorescence, and photodynamic therapy. Above all, the mechanisms and laws of the system are preliminarily found. First, AIEs and ACQs must, respectively, have electron-acceptor and electron-donors to form an intermolecular push–pull structure to ensure that the two molecules are close to each other, and intermolecular π–π stacking interaction separates the highest occupied molecular orbitals and lowest unoccupied molecular orbitals to reduce ΔE_st, causing intriguing optical properties. Second, the matching degree of the conjugate structure between AIEs and ACQs is also an important factor. Utilizing these systems, it is found that different structural compositions possess different optical synergy properties, so different AIE@ACQ bimolecular systems can be constructed according to the actual needs, which have the advantages of efficiency and convenience, providing a new idea for the united application of AIEs and ACQs.

更新日期：2023-04-25

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