title: On-surface azide-alkyne cycloaddition on Au(111).
abstract: We present [3 + 2] cycloaddition reactions between azides and alkynes on a Au(111) surface at room temperature and under ultrahigh vacuum conditions. High-resolution scanning tunneling microscopy images reveal that these on-surface cycloadditions occur highly regioselectively to form the corresponding 1,4-triazoles. Density functional theory simulations confirm that the reactions can occur at room temperature, where the Au(111) surface does not participate as a catalytic agent in alkyne C-H activation but acts solely as a two-dimensional constraint for the positioning of the two reaction partners. The on-surface azide-alkyne cycloaddition offers great potential toward the development and fabrication of functional organic nanomaterials on surfaces.
authors.affiliation: Physikalisches Institut, Westfälische Wilhelms-Universität Münster , Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany.
authors.forename: Oscar
authors.initials: O
authors.lastname: Díaz Arado
authors.forename: Harry
authors.initials: H
authors.lastname: Mönig
authors.forename: Hendrik
authors.initials: H
authors.lastname: Wagner
authors.forename: Jörn-Holger
authors.initials: JH
authors.lastname: Franke
authors.forename: Gernot
authors.initials: G
authors.lastname: Langewisch
authors.forename: Philipp Alexander
authors.initials: PA
authors.lastname: Held
authors.forename: Armido
authors.initials: A
authors.lastname: Studer
authors.forename: Harald
authors.initials: H
authors.lastname: Fuchs