Silicon functionalization expands the repertoire of Si-rhodamine fluorescent probes.
Silicon functionalization expands the repertoire of Si-rhodamine fluorescent probes.
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硅功能化扩展了硅-罗丹明荧光探针的库。
DOI:
10.1039/d2sc01821g
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发表时间:
2022-05-25
期刊:
影响因子:
8.4
通讯作者:
Miller, Stephen C.
中科院分区:
文献类型:
--
作者:
Rao, Desaboini Nageswara;Ji, Xincai;Miller, Stephen C.
Fluorescent dyes such as rhodamines are widely used to assay the activity and image the location of otherwise invisible molecules. Si-rhodamines, in which the bridging oxygen of rhodamines is replaced with a dimethyl silyl group, are increasingly the dye scaffold of choice for biological applications, as fluorescence is shifted into the near-infrared while maintaining high brightness. Despite intense interest in Si-rhodamines, there has been no exploration of the scope of silicon functionalization in these dyes, a potential site of modification that does not exist in conventional rhodamines. Here we report a broad range of silyl modifications that enable brighter dyes, further red-shifting, new ways to modulate fluorescence, and the introduction of handles for dye attachment, including fluorogenic labeling agents for nuclear DNA, SNAP-tag and HaloTag labeling. Modifications to the bridging silicon are therefore of broad utility to improve and expand the applications of all Si-dyes. Functionalization of the bridging silicon atom of Si-rhodamine dyes allows tuning of dye performance, the attachment of sensors, and the addition of biomolecular targeting ligands useful for the construction of live cell imaging probes.
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