Azido push-pull fluorogens photoactivate to produce bright fluorescent labels.
Azido push-pull fluorogens photoactivate to produce bright fluorescent labels.
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DOI:
10.1021/jp907080r
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发表时间:
2010-11-18
期刊:
影响因子:
--
通讯作者:
Moerner WE
中科院分区:
文献类型:
--
作者:
Lord SJ;Lee HL;Samuel R;Weber R;Liu N;Conley NR;Thompson MA;Twieg RJ;Moerner WE
Dark azido push–pull chromophores have the ability to be photoactivated to produce bright fluorescent labels suitable for single-molecule imaging. Upon illumination, the aryl azide functionality in the fluorogens participates in a photochemical conversion to an aryl amine, thus restoring charge-transfer absorption and fluorescence. Previously, we reported that one compound, DCDHF-V-P-azide, was photoactivatable. Here, we demonstrate that the azide-to-amine photoactivation process is generally applicable to a variety of push–pull chromophores, and we characterize the photophysical parameters including photoconversion quantum yield, photostability, and turn-on ratio. Azido push–pull fluorogens provide a new class of photoactivatable single-molecule probes for fluorescent labeling and super-resolution microscopy. Lastly, we demonstrate that photoactivated push–pull dyes can insert into bonds of nearby biomolecules, simultaneously forming a covalent bond and becoming fluorescent (fluorogenic photoaffinity labeling).
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