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Issue 3, 2012
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Synthesis of multifunctional polymer brush surfaces via sequential and orthogonal thiol-click reactions

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Abstract

Fabrication of multifunctional surfaces with complexity approaching that found in nature requires the application of a modular approach to surface engineering. We describe a versatile post-polymerization modification strategy to synthesize multifunctional polymer brush surfaces via combination of surface-initiated photopolymerization (SIP) and orthogonal thiol-click reactions. Specifically, we demonstrate two routes to multifunctional brush surfaces: in the first approach, alkyne-functionalized homopolymer brushes are modified with multiple thiolsvia a statistical, radical-mediated thiol-yne co-click reaction; and in the second approach, statistical copolymer brushes carrying two distinctly-addressable reactive moieties are sequentially modified via orthogonal base-catalyzed thiol-X (where X represents an isocyanate, epoxy, or α-bromoester) and radical-mediated thiol-yne reactions. In both cases, we show that surface properties, in the form of wettability, can be easily tuned over a wide range by judicious choice of brush composition and thiol functionality.

Graphical abstract: Synthesis of multifunctional polymer brush surfaces via sequential and orthogonal thiol-click reactions

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Publication details

The article was received on 23 Sep 2011, accepted on 27 Oct 2011 and first published on 14 Nov 2011


Article type: Paper
DOI: 10.1039/C1JM14762E
Citation: J. Mater. Chem., 2012,22, 932-943
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    Synthesis of multifunctional polymer brush surfaces via sequential and orthogonal thiol-click reactions

    S. B. Rahane, R. M. Hensarling, B. J. Sparks, C. M. Stafford and D. L. Patton, J. Mater. Chem., 2012, 22, 932
    DOI: 10.1039/C1JM14762E

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