<br>通过环翻转异构化实现多重光图案化的光活化发光基序,Journal of the American Chemical Society

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通过环翻转异构化实现多重光图案化的光活化发光基序
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2023-12-05 , DOI: 10.1021/jacs.3c07478
Xin Li ₁ , Wenlang Li ₁ , Xinyue Liu ₁ , Minjie Zhang ₁ , Eric Y Yu ₁ , Anthony W K Law ₁ , Xinwen Ou ₁ , Jianyu Zhang ₁ , Herman H Y Sung ₁ , Xuefeng Tan ₂ , Jianwei Sun , Jacky W Y Lam ₁ , Zhihong Guo ₁ , Ben Zhong Tang _{1,

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Affiliation

光活化发光材料在智能响应材料领域引起了极大的关注，但由于光活化图案的种类有限，其设计和应用仍然具有挑战性。在本文描述的工作中，我们发现了一种新的光激活发光基序，该基序在紫外线照射下经历了环翻转异构化。该基序的发射表现出从深黄色到亮绿色的快速转变，同时量子产率从 1.9% 显着提高到 34.2%。实验和理论研究表明，有效的分子内运动（EIM）对于两种异构体之间不同的发光性能至关重要。此外，含有该基序的聚合物是通过一锅炔聚合获得的，具有光致荧光变色和光交联特性。此外，还实现了多种类型的光图案化，包括发光加密、荧光灰度成像和高分辨率光刻图案。这项工作开发了一种新的光激活发光图案，并展示了其在小分子和大分子中的潜在应用，这将有助于未来光激活发光材料的设计。

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A Photoactivatable Luminescent Motif through Ring-Flipping Isomerization for Multiple Photopatterning

Photoactivatable luminescent materials have garnered enormous attention in the field of intelligent responsive materials, yet their design and applications remain challenging due to the limited variety of photoactivatable motifs. In the work described herein, we discovered a new photoactivatable luminescent motif that underwent ring-flipping isomerization under UV irradiation. The emission of this motif exhibited a rapid transformation from dark yellow to bright green, accompanied by a significant enhancement of quantum yield from 1.9% to 34.2%. Experimental and theoretical studies revealed that the effective intramolecular motion (EIM) was crucial to the distinct luminescence performance between two isomers. In addition, polymers containing this motif were achieved through a one-pot alkyne polymerization, exhibiting both photofluorochromic and photo-cross-linking properties. Furthermore, multiple types of photopatterning, including luminescent encryption, fluorescent grayscale imaging, and high-resolution photolithographic patterns, were realized. This work developed a new photoactivatable luminescent motif and demonstrated its potential applications in both small molecules and macromolecules, which will help in the future design of photoactivatable luminescent materials.

更新日期：2023-12-05

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