Synthesis of 5-substituted 1,3-[bis(2,2′:6′,2″- terpyridin-4′-ylethynyl)]benzene ligands and their coordination-driven self-assembly

Abstract

The preparation of discrete 5-substituted 1,3-[bis(2,2′:6′, 2″-terpyridin-4′-ylethynyl)] benzenes is described. A Pd-catalyzed cross-coupling procedure was employed to build these elongated, functionalized bis(terpyridine)-ligands, which readily self-assemble to afford the corresponding hexameric metallomacrocycle possessing an inner void diameter of 24 Å.