Mr. Ryan D. Roeder Profile

Ryan D. Roeder

at Clemson Univ

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Proceedings Article | 1 March 2010 Paper

Piecewise fabrication of click functionalized core-shell particles

Ryan Roeder, David Evanoff, Stephen Foulger

Proceedings Volume 7599, 75990A (2010) https://doi.org/10.1117/12.842680

KEYWORDS: Particles, Polymers, Molecules, Polymerization, Sodium, Polymethylmethacrylate, Magnesium, Potassium, Nitrogen, Chromophores

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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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