自体荧光
二芳基乙烯
荧光
光漂白
光电开关
荧光寿命成像显微镜
材料科学
生物成像
光致变色
可见光谱
光化学
活体细胞成像
近红外光谱
光电子学
纳米技术
光学
化学
生物化学
物理
细胞
作者
Hye‐youn Jung,Boram Kim,Min Ho Jeon,Yoonkyung Kim
出处
期刊:Small
[Wiley]
日期:2022-01-13
卷期号:18 (10)
被引量:10
标识
DOI:10.1002/smll.202103523
摘要
Fluorescence imaging is an indispensable tool in modern biological research, allowing simple and inexpensive color-coded visualizations of real-time events in living cells and animals, as well as of fixed states of ex vivo specimens. The accuracy of fluorescence imaging in living systems is, however, impeded by autofluorescence, light scattering, and limited penetration depth of light. Nevertheless, the clinical use of fluorescence imaging is expected to grow along with advances in imaging equipment, and will increasingly demand high-accuracy probes to avoid false-positive results in disease detection. To this end, a water-soluble and relatively safe diarylethene (DAE)-based reversible near-infrared (NIR) fluorescence photoswitch for living systems is prepared here. Furthermore, to facilitate excellent switching performance, the photoirradiation results obtained is compared using three different visible light sources to turn on NIR fluorescence through cycloreversion of DAE. While photoswitching using 589 nm light leads to slightly higher cell viability, fluorescence quenching efficiency and fatigue resistance are higher when 532 nm light with low photobleaching is used in both aqueous solution and living systems. The authors anticipate that their reversible NIR fluorescence photoswitch mediated by DAE can be beneficial for fluorescence imaging in aqueous media requiring accurate detection, such as in the autofluorescence-rich living environment.
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