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Polydiacetylene-based ultrastrong bioorthogonal Raman probes for targeted live-cell Raman imaging
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Polydiacetylene-based ultrastrong bioorthogonal Raman probes for targeted live-cell Raman imaging
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Journal Article
Polydiacetylene-based ultrastrong bioorthogonal Raman probes for targeted live-cell Raman imaging
2020
Overview
Live-cell Raman imaging based on bioorthogonal Raman probes with distinct signals in the cellular Raman-silent region (1800–2800 cm
−1
) has attracted great interest in recent years. We report here a class of water-soluble and biocompatible polydiacetylenes with intrinsic ultrastrong alkyne Raman signals that locate in this region for organelle-targeting live-cell Raman imaging. Using a host-guest topochemical polymerization strategy, we have synthesized a water-soluble and functionalizable master polydiacetylene, namely poly(deca-4,6-diynedioic acid) (PDDA), which possesses significantly enhanced (up to ~10
4
fold) alkyne vibration compared to conventional alkyne Raman probes. In addition, PDDA can be used as a general platform for multi-functional ultrastrong Raman probes. We achieve high quality live-cell stimulated Raman scattering imaging on the basis of modified PDDA. The polydiacetylene-based Raman probes represent ultrastrong intrinsic Raman imaging agents in the Raman-silent region (without any Raman enhancer), and the flexible functionalization of this material holds great promise for its potential diverse applications.
Raman probes which operate in the cellular silent region are of interest for live cell imaging. Here, the authors report on the development of a water soluble polydiacetylene Raman probe with enhanced Raman signal in the silent region which can be functionalised for organelle targeting and demonstrate application.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 140/131
/ 140/133
/ 140/58
/ Acids
/ Alkynes
/ Humanities and Social Sciences
/ Humans
/ Hydrogen
/ Imaging
/ Molecular Imaging - instrumentation
/ Molecular Probes - chemical synthesis
/ Molecular Probes - chemistry
/ Polyacetylene Polymer - chemical synthesis
/ Polyacetylene Polymer - chemistry
/ Polymers
/ Probes
/ Science
/ Spectrum Analysis, Raman - instrumentation
