Fast Emission Color Switching of Circularly Polarized Luminescence in Platinum(II) Liquid Crystalline Co-Assembly

IF 7.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chemical Science Pub Date : 2025-05-13 DOI:10.1039/d5sc02285a

Guo Zou, Qihuan Li, Zhenhao Jiang, Wentong Gao, Yixiang Cheng

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引用次数: 0

Abstract

Developing stimuli-responsive circularly polarized luminescence (CPL) materials that feature fast emission color switching for advanced information encryption presents a scientifically significant yet formidable challenge. Herein, we construct a supramolecular co-assembly system demonstrating transiently responsive CPL emission color switching, enabling mechanically-modulated information encryption. Combining a highly luminescent Pt(II) liquid crystal (Pt8) with the anchored binaphthyl inducers (R/S-M) form chiral co-assemblies (R/S-M)0.03-(Pt8)0.97, which assembles into twisted nanobelts (180 ºC) and helical nanofibers (260 ºC) exhibiting green (λem = 545 nm, gem = 0.038) and red CPL (λem = 640 nm, gem = 0.133), respectively. Notably, mechanical grinding transforms the 180 ºC-annealed (R/S-M)0.03-(Pt8)0.97 into nanoparticles, resulting in a fast dynamic switching of CPL emission color from green to orange-red (λem: 545 → 625 nm, gem: 0.038 → 0.058). Reheating the grinding films (R/S-M)0.03-(Pt8)0.97 to 180 ºC restores the initial green CPL of the nanobelts. Based on the fast CPL emission color switching, we demonstrate the applications of these supramolecular chiral co-assemblies for mechanically-modulated information encryption.

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铂（II）液晶共组装中圆偏振发光的快速发射色开关

开发具有快速发射颜色切换特性的刺激响应圆偏振发光（CPL）材料用于高级信息加密是一项具有重大科学意义但又艰巨的挑战。在此，我们构建了一个超分子共组装系统，演示瞬态响应CPL发射颜色切换，实现机械调制信息加密。将高发光Pt（II）液晶（Pt8）与锚定的二苯基诱导剂（R/S-M）结合形成手性共组装体（R/S-M）0.03-(Pt8)0.97，组装成扭曲纳米带（180℃）和螺旋纳米纤维（260℃），分别显示绿色（λem = 545 nm, gem = 0.038）和红色CPL （λem = 640 nm, gem = 0.133）。值得注意的是，机械磨削将180ºc退火（R/S-M）0.03-(Pt8)0.97转变为纳米颗粒，导致CPL发射颜色从绿色快速动态切换到橙红色（λem: 545→625 nm, gem: 0.038→0.058）。将研磨膜（R/S-M）0.03-(Pt8)0.97再加热至180℃，可恢复纳米带的初始绿色CPL。基于CPL发射色的快速切换，我们展示了这些超分子手性共组装体在机械调制信息加密中的应用。

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

Chemical Science CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

4.80%

发文量

1352

审稿时长

2.1 months

期刊介绍： Chemical Science is a journal that encompasses various disciplines within the chemical sciences. Its scope includes publishing ground-breaking research with significant implications for its respective field, as well as appealing to a wider audience in related areas. To be considered for publication, articles must showcase innovative and original advances in their field of study and be presented in a manner that is understandable to scientists from diverse backgrounds. However, the journal generally does not publish highly specialized research.