Organic NIR afterglow with emission wavelengths beyond 800 nm

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

Science China Materials Pub Date : 2025-08-20 DOI:10.1007/s40843-025-3639-7

Likai Yuan (, ), Juqing Gu (, ), Wentao Yuan (, ), Ningyuan Zhao (, ), Changzun Jiang (, ), Jiaqiang Wang (, ), Qianqian Li (, ), Zhen Li (, )

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引用次数: 0

Abstract

Organic near-infrared (NIR) afterglow has considerable potential for bioimaging applications owing to its deep penetration depth and high signal-to-background ratio (SBR). However, achieving organic afterglow with emission wavelengths above 800 nm is still a significant academic challenge because of the limitations of the energy gap law. Herein, bright NIR afterglow with a wavelength of 820 nm was realized via an intelligent molecular design strategy: alternating electronic donor-acceptor (D-A) structures and multiple S⋯O intramolecular interactions were utilized to enhance the intramolecular charge transfer (ICT) effect and strengthen intramolecular interactions. Additionally, terminal groups and side chains optimize the intermolecular interactions among luminogens to suppress nonradiative transitions. This work provides a promising strategy to achieve efficient NIR afterglow, further promoting its potential applications in bioimaging with deep tissue penetration and high SBR.

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发射波长超过800纳米的有机近红外余辉

有机近红外（NIR）余辉由于其深穿透深度和高信号背景比（SBR），在生物成像领域具有相当大的应用潜力。然而，由于能隙定律的限制，实现发射波长在800 nm以上的有机余辉仍然是一个重大的学术挑战。在此，通过智能分子设计策略实现了波长为820 nm的明亮近红外余光：利用交替的电子供体-受体（D-A）结构和多个S⋯O分子内相互作用来增强分子内电荷转移（ICT）效应并加强分子内相互作用。此外，末端基团和侧链优化了发光原之间的分子间相互作用，抑制了非辐射跃迁。本研究为实现高效的近红外余辉提供了一种有前景的策略，进一步促进了其在具有深层组织穿透性和高SBR的生物成像中的潜在应用。

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.