Photoreactive polymer brushes for high-density patterned surface derivatization using a Diels-Alder photoclick reaction |
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Authors: | Arumugam Selvanathan Orski Sara V Locklin Jason Popik Vladimir V |
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Institution: | Department of Chemistry and the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, USA. |
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Abstract: | Reactive polymer brushes grown on silicon oxide surfaces were derivatized with photoreactive 3-(hydroxymethyl)naphthalene-2-ol (NQMP) moieties. Upon 300 or 350 nm irradiation, NQMP efficiently produces o-naphthoquinone methide (oNQM), which in turn undergoes very rapid Diels-Alder addition to vinyl ether groups attached to a substrate, resulting in the covalent immobilization of the latter. Any unreacted oNQM groups rapidly add water to regenerate NQMP. High-resolution surface patterning is achieved by irradiating NQMP-derivatized surfaces using photolithographic methods. The Diels-Alder photoclick reaction is orthogonal to azide-alkyne click chemistry, enabling sequential photoclick/azide-click derivatizations to generate complex surface functionalities. |
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