Two Key Descriptors for Designing Second Near-Infrared Dyes and Experimental Validation
作者:Yi Zeng、Jiamin Qu、Guanghao Wu、Yeyun Zhao、Jiaman Hao、Yuping Dong、Zesheng Li、Jianbing Shi、Joseph S. Francisco、Xiaoyan Zheng
DOI:10.1021/jacs.3c14805
日期:2024.4.10
Second near-infrared (NIR-II) optical imaging technology has emerged as a powerful tool for diagnostic and image-guided surgery due to its higher imaging contrast. However, a general strategy for efficiently designing NIR-II organic molecules is still lacking, because NIR-II dyes are usually difficult to synthesize, which has impeded the rapid development of NIR-II bioprobes. Herein, based on the theoretical
第二近红外(NIR-II)光学成像技术因其更高的成像对比度而成为诊断和图像引导手术的强大工具。然而,由于NIR-II染料通常难以合成,目前仍然缺乏有效设计NIR-II有机分子的通用策略,这阻碍了NIR-II生物探针的快速发展。本文基于对 62 个光谱从可见光到 NIR-II 区的多芳基吡咯 (MAP) 体系的理论计算,通过调整类型和参数,可以实现光谱向 NIR-II 区的连续红移。 MAP 上的取代基位点。两个描述符(Δ E gs和 μ gs )被确定为与最大吸收/发射波长表现出强相关性,并且仅当 Δ E gs ≤ 2.5 eV 且以下情况下,描述符才可用于预测 NIR-II 区域中的发射光谱: μ gs ≤ 22.55 D。十个MAP的实验吸收和发射光谱充分证实了理论预测,新设计的MAP23-BBT的体内生物成像在深部组织血管造影的NIR-II区域显示出高空间分辨率。更重要的是,Δ E gs和