Functionalized resorcin[4]arene-based coordination polymers as heterogeneous catalysts for click reactions

Abstract

Three distinctive coordination polymers [Cu₂L₂]·0.5CH₃OH·1.5H₂O·2CN (1), [CdCl₂L]·5DMF·2CH₃OH·2H₂O (2) and [Cd₂L(bdc)₂(DMF)]·2DMF·3CH₃OH·H₂O (3) were solvothermally synthesized using a resorcin[4]arene ligand (H₂bdc = p-phthalic acid and L = tetrakis(4-mercaptopyridine-ylmethyl)resorcin[4]arene). Among them, 1 exhibits a 3D structure, but 2 and 3 are both charming layers. 1 exhibits efficient and selective catalytic performance for azide–alkyne cycloaddition reactions owing to its rich Lewis acid sites. Remarkably, as a heterogeneous catalyst, 1 could be recycled with preservation of the catalytic capability and structural integrity.