自体荧光
发光
发光测量
分子成像
生物发光
化学发光
纳米技术
光学成像
持续发光
材料科学
分子信标
荧光
化学
生物物理学
光电子学
光学
生物化学
生物
寡核苷酸
物理
生物技术
有机化学
热释光
体内
DNA
作者
Xianbao Sun,Lingling Xu,Xiaoyang Liu,Haidong Xu,Wenjun Zhan,Gaofeng Liang
标识
DOI:10.1016/j.trac.2023.117326
摘要
Autofluorescence-free luminescence imaging, which captures optical output without using real-time light excitation, enables non-invasive visualization of biological events with extremely low backgrounds. It is endowed with high specificity and sensitivity at the molecular level by adjuvant stimulus-activatable probes, which turn their luminescent signals “on” exclusively at the stimulus-rich region of interest. Particularly, those activatable autofluorescence-free imaging probes with small molecular weights (i.e., activatable small molecular probes) also possess high molecular programmability, well-defined chemical structure, tunable optical properties, and relatively high biosafety. In this review, we provide an overview of the activatable small molecular probes with autofluorescence-free techniques (including chemiluminescence, bioluminescence, time-gated luminescence, and afterglow luminescence) for imaging of endogenous bioanalytes (i.e., enzymes and bioactive species), with the emphasis on the very recent breakthroughs in the past three years (from 2020 to early 2023). Finally, challenges and trends in this field are discussed.
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