Unveiling the Inversion-Symmetry-Driven Excitation Switching in Aggregation-Induced Emission

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-04-17 DOI:10.1021/acsmaterialslett.4c0255010.1021/acsmaterialslett.4c02550

Charya J. Senanayake, Thalpage Don Dinithi Kavindi, D. H. Sanduni Deenalattha, Dinushika Kotudura Arachchige, Kaushanie Gunarathne, P. M. Anuradha Bandaranayake, U. Dulanjali Rodrigo, Nuwan de Silva and Neranga Abeyasinghe*,

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Abstract

Understanding the aggregation-induced emission (AIE) mechanism, where the fluorescence is enhanced upon aggregation, is a critical step in predictably designing AIE molecules for use in novel applications. Here, we report a π–π stacked AIE chromophore, A3MN, that demonstrates the switching of the excitation maximum when moving from monomers to aggregates, which has never been reported before. Also, we elucidate such switching by revealing a novel electronic origin for AIE via inversion-symmetry-driven fluorescence in A3MN. We observe this unique fluorescence phenomenon being affected by mechanical crushing and the rate of dissolution of crystals in the solvent. This inversion-symmetry-driven emission phenomenon plays a pivotal role in modulating the AIE of A3MN aggregates in solution, films, and crystals. The insights unveiled here allow the design and engineering of AIE systems that can be adopted in a multitude of applications including mechanical impact/damage memory storage (and reading) using luminescence, quantum computing, sensing, and super-resolution imaging.

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揭示聚集诱导发射中逆对称驱动的激励开关

了解聚集诱导发射（AIE）机制，其中荧光在聚集时增强，是可预测地设计AIE分子用于新应用的关键步骤。在这里，我们报道了一个π -π堆叠的AIE发色团A3MN，它展示了从单体到聚集体时激发最大值的切换，这在以前从未报道过。此外，我们通过在A3MN中通过反转对称驱动荧光揭示AIE的新电子起源来阐明这种开关。我们观察到这种独特的荧光现象受到机械破碎和溶剂中晶体溶解速度的影响。这种逆对称驱动的发射现象在调节溶液、薄膜和晶体中A3MN聚集体的AIE中起着关键作用。本文揭示的见解允许AIE系统的设计和工程，可用于多种应用，包括使用发光，量子计算，传感和超分辨率成像的机械冲击/损坏存储器存储（和读取）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.