The functionalization of colloidal surfaces has been an area of scientific research for several decades.
With the emergence of click reactions, particularly the copper(I) catalyzed version of Huisgen 1,3-dipolar
cycloaddition between azides and alkynes, new pathways to functionalize the particle surface in aqueous
environments have opened for researchers to explore. In colloidal systems synthesized by free radical
polymerization with monomers containing azides or alkynes, networked polymers are produced due to
the bifunctionality of both monomers. The primary means of characterizing the success of these reactions
due to the rigidity of the crosslinked particle is the use of a chromophore as the "clicked' material or
titrations of a weak acid that has been "clicked'. Herein, the piecewise process of building a core-shell
particle is described that avoids the unwanted crosslinking of an alkyne containing monomer. Due to the
control of the piecewise fabrication, the polymer shell can removed with a favorable solvent pre- or post-functionalization
with an azide-functionalized anthracene molecule.
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