Dual-mode photochromic luminescence of carbon dots induced by photoinduced electron transfer

IF 7.4 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-08-12 DOI:10.1007/s40843-025-3555-y

Jueran Cao (, ), Enlin Huang (, ), Ziting Zhong (, ), Tingjie Jiang (, ), Haoran Zhang (, ), Wei Li (, ), Xuejie Zhang (, ), Chaofan Hu (, ), Bingfu Lei (, )

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引用次数: 0

Abstract

The integration of photochromism and photoluminescence in functional materials presents significant challenges, particularly in achieving broad-spectrum color modulation and rapid response. In this work, we have developed sodium-doped and sodium/boron co-doped CDs that exhibit dual-mode photochromic luminescent behavior through a novel radical-mediated mechanism. The Na-CDs demonstrated a 180 nm red-shift in emission, transitioning from 450 to 630 nm. The Na, B-CDs achieved blue-shifted, multicolor emission, progressing from orange to yellow and green under 30-s UV irradiation. Notably, the photochromic states spontaneously reverted to their initial configurations without external stimuli. These phenomena arise from photoinduced electron transfer between pristine CDs and light-generated anionic radicals. Leveraging these unique photochromic properties, we implemented reversible anti-counter-feiting systems and information encryption platforms. Furthermore, the photochromic CDs exhibit daylight-responsive UV detection capabilities and are functional in plant cell imaging, significantly expanding their potential applications in optoelectronic devices.

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光致电子转移诱导碳点的双模光致变色发光

光致变色和光致发光在功能材料中的集成面临着重大挑战，特别是在实现广谱颜色调制和快速响应方面。在这项工作中，我们开发了钠掺杂和钠/硼共掺杂的CDs，它们通过一种新的自由基介导机制表现出双模光致变色发光行为。Na-CDs表现出180 nm的发射红移，从450 nm过渡到630 nm。Na， B-CDs在30 s紫外照射下实现了蓝移、多色发射，从橙色渐变到黄色和绿色。值得注意的是，在没有外界刺激的情况下，光致变色状态自发地恢复到它们的初始构型。这些现象是由原始CDs和光产生的阴离子自由基之间的光诱导电子转移引起的。利用这些独特的光致变色特性，我们实现了可逆的防伪系统和信息加密平台。此外，光致变色CDs表现出对日光响应的紫外线检测能力，并在植物细胞成像中发挥作用，大大扩展了它们在光电器件中的潜在应用。

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

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.