Conjugation of graphene on Au surface by π–π interaction and click chemistry

Development of strategies for reproducible functionalization of inert graphene without adversely altering its structure and electronic properties is of key importance. Herein, we report a versatile approach for non-covalent functionalization of the basal plane of graphene, based on π–π interaction and click chemistry. The π system of alkyne-functionalized pyrene, as molecular “anchor”, adsorbs on graphene via π–π interaction; alkyne, as the terminal group, can be combined with azide on various substrate via click chemistry, copper (I)-catalyzed azide–alkyne cycloaddition reaction.

Graphical abstractOne hand of the bifunctional modular unit, alkyne-functionalized pyrene, anchors on graphene via π–π interaction; and the other hand, alkyne terminal group, can be combined with azide on various substrates via click chemistry.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Bifunctional modular unit of alkyne-functionalized pyrene is synthesized. ► Pyrene-anchored graphene is conjugated on the gold surface through click chemistry. ► This strategy may facilitate new ways to design graphene-based electrochemical devices.