AIE-active fluorescence emitters containing tetraphenylethylene and α-cyanostilbene with mechanochromism and photo-responsive behaviors

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-11-06 DOI:10.1016/j.jlumin.2024.120973

Haoyu Ma , Xiaoling Niu , Wenlong Qu , Yongliang Liu , Zhen Feng , Shengbo Zhu

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Abstract

Aggregation induced emission luminogens (AIEgens) as one of the optimal alternatives for designing stimuli-responsive fluorophores for real-life applications have sparked much current interest in smart materials design. Herein, the “Star molecules” in AIEgens of α-cyanostilbene and Tetraphenylethylene (TPE) derivatives were constructed into one molecular, namely DC-TPE-tBu and DC-TPE-CN. Both compounds exhibited significant AIE properties. Moreover, the two compounds could change their luminescent colors and intensities under the stimulation of external mechanical force and UV light, showing excellent mechanochromic luminescent (MCL) and remarkable photo-responsive behaviors, respectively. The stimuli responsive mechanisms were investigated by powder X-Ray diffractometer (PXRD) spectra and density functional theory calculations (DFT). The MLC behaviors were associated with the crystalline-to-amorphous transitions after mechanical grinding. These remarkable features make them suitable for the application of mechano/photo-sensors. The studies provide a useful strategy for developing AIE-active functional materials.

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含有四苯基乙烯和α-氰基二苯乙烯的 AIE 活性荧光发射器，具有机械变色和光响应行为

聚合诱导发射荧光团（AIEgens）作为设计刺激响应型荧光团的最佳替代品之一，在现实生活中的应用引发了当前智能材料设计领域的广泛关注。在本文中，α-氰基二苯乙烯和四苯基乙烯（TPE）衍生物 AIEgens 中的 "明星分子 "被构建成一个分子，即 DC-TPE-tBu 和 DC-TPE-CN。这两种化合物都具有明显的 AIE 特性。此外，这两种化合物在外部机械力和紫外光的刺激下可改变发光颜色和强度，分别表现出优异的机械变色发光（MCL）和显著的光响应行为。粉末 X 射线衍射仪（PXRD）光谱和密度泛函理论（DFT）计算研究了刺激响应机制。MLC 行为与机械研磨后晶体到非晶体的转变有关。这些显著特征使它们适合应用于机械/光电传感器。这些研究为开发 AIE 活性功能材料提供了有用的策略。

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

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.