文献类型：期刊文献

英文题名：Hybrid Planar-Twisted Chair-Shaped Indoline Donor Enabling Bright Molecular and Aggregated State Near-Infrared Emission

作者：Xu, Qiqi[1,2];Wang, Ying[1,2,3];Guan, Yiyan[4,5];Ma, Chenggong[1,2];Yi, Guofeng[1,2];Du, Xinyun[1,2];Bin, Haile[1,2];Shen, Wentao[1,2];Wang, Cheng-yun[1,2,3];Wu, Yongzhen[1,2,3];Ma, Huili[4,5];Tong, Fei[1,2,3];Zhu, Wei-hong[1,2,3];Zhao, Weijun[1,2,3]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Inst Fine Chem,Sch Chem & Mol Engn,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr,Shangh, Sch Chem & Mol Engn,Joint Int Res Lab Precis Chem, Inst Fine Chem,Frontiers Sci Ctr Materiobiol & Dyn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China;[4]Nanjing Tech Univ Nanjing Tech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China;[5]Nanjing Tech Univ Nanjing Tech, Inst Adv Mat IAM, Nanjing 211816, Peoples R China

年份：2026

卷号：65

期号：2

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20254619500261);WOS:【SCI-EXPANDED(收录号:WOS:001610187800001)】；

基金：The authors are grateful to financial support from the Basic Science Center of National Natural Science Foundation (T2488302), National Natural Science Foundation of China (9235630033, 22105069, 22275085, 62305276, 92356301, 22338006), China National Postdoctoral Program for Innovative Talents under Grant (BX20250111), Shanghai Natural Science Foundation (25ZR1402112), Innovation Program of Shanghai Municipal Education Commission (2023FGS01), Science and Technology Commission of Shanghai Municipality (24DX1400200), Natural Science Foundation of Jiangsu Province (BK20231225), and the China Postdoctoral Science Foundation (2024T170271).

语种：英文

外文关键词：Aggregation-induced emission; Bio-imaging; Donor engineering; Hybrid planar-twisted conformation; NIR fluorophores

摘要：Organic near-infrared (NIR) fluorophores with donor-acceptor (D-A) architectures have emerged as a preeminent paradigm in optoelectronic engineering and biomedical applications. However, conventional D-A NIR emitters often suffer from aggregation-induced quenching or weak absorption owing to the use of planar (e.g., carbazole) or highly twisted (e.g., triphenylamine) donor units, which impairs their versatile utility in molecular and aggregated states. Herein, we proposed a unique chair-shaped indoline donor (cID) with a hybrid planar-twisted conformation, which affords bright various states (solution, solid, microspheres, nanoparticles, and films) NIR emission spanning 650-1200 nm, with tails extending to 1600 nm. The cID donor promotes electron localization, imparting higher oscillator strength and a smaller HOMO-LUMO energy gap to the designed NIR fluorophores, which together enhance light-harvesting capacity and induce red-shifted emission. Meanwhile, the sterically hindered nonconjugated group in cID effectively restricts low frequency vibration-induced non-radiative decay, as evidenced by the reduced reorganization energy and Huang-Rhys factor in both isolated and crystalline phase. Through structurally pi-conjugation extension, these NIR fluorophores exhibit robust various-state NIR-I (photoluminescence quantum yields up to 67.8% and brightness up to 15668 M-1 cm-1) and NIR-II emission, which allows diverse advanced applications in porous ceramic damage detection, stimulated emission depletion (STED) microscopy, and NIR-II vascular imaging, thereby positioning cID as a versatile toolkit to create a novel NIR dye library for biomedical and optoelectronic field.