American Chemical Society
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Multiphoton Activation of Photo-Strain-Promoted Azide Alkyne Cycloaddition “Click” Reagents Enables in Situ Labeling with Submicrometer Resolution

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journal contribution
posted on 2017-09-19, 00:00 authored by Christopher D. McNitt, Hazel Cheng, Susanne Ullrich, Vladimir V. Popik, Matthew Bjerknes
Irradiation of cyclopropenone-masked dibenzocyclooctynes with near-infrared pulses from a femtosecond laser triggers photodecarbonylation via nonresonant two- or three-photon excitation. Multiphoton-generated cyclooctynes undergo a SPAAC reaction with organic azides, yielding the expected triazoles. Multiphoton-triggered SPAAC (MP-SPAAC) enables high resolution 3-D photoclick derivatization of hydrogels and tissues.