“Click-and-click” – hybridised 1,2,3-triazoles supported Cu(i) coordination polymers for azide–alkyne cycloaddition

Abstract

Two novel pyridyl and thioether hybridised 1,2,3-triazole ligands 1-(2-picolyl)-4-(2-(methylthio)-pyridine)-1H-1,2,3-triazole (L1) and 1-(4-picolyl)-4-(2-(methylthio)-pyridine)-1H-1,2,3-triazole (L2) were prepared from CuAAC click reactions. Reactions of CuI with the ligands L1 and L2 yielded two one-dimensional coordination polymers [Cu₆I₆(L1)₂]_n (1) and [Cu₂I₂(L2)₂]_n (2). Single-crystal X-ray diffraction reveals that 1 and 2 are polymeric with [Cu₆I₆] and [Cu₂I₂] respectively as building blocks. Both ligands (L1 and L2) and complexes (1 and 2) are photoluminescence active. Complexes 1 and 2 are also catalytically active towards azide–alkyne cycloaddition reactions.