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Kinetic analysis of bioorthogonal reaction mechanisms using Raman microscopy

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Original languageEnglish
JournalFaraday Discussions
Early online date18 Jun 2019
Publication statusE-pub ahead of print - 18 Jun 2019


Raman spectroscopy is well-suited for the study of bioorthogonal reaction processes because it is a non-destructive technique, which employs relatively low energy laser irradiation, and water is only very weakly scattered in the Raman spectrum enabling live cell imaging. In addition, Raman spectroscopy allows species-specific label-free visualisation; chemical contrast may be achieved when imaging a cell in its native environment without fixatives or stains. Combined with the rapid advances in the field of Raman imaging over the last decade, particularly in stimulated Raman spectroscopy (SRS), this technique has the potential to revolutionise our mechanistic understanding of biochemical and medicinal chemistry applications of bioorthogonal reactions. Current approaches to the kinetic analysis of bioorthogonal reactions (including heat flow calorimetry, uv-vis spectroscopy, fluorescence, IR, NMR and MS), have a number of practical shortcomings for intracellular applications. We highlight the advantages offered by Raman microscopy for reaction analysis in the context of both established and emerging bioorthogonal reactions, including the copper(I) catalysed azide alkyne cycloaddition (CuAAC) click reaction and Glaser-Hay coupling.

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