Homologous size-extension of hybrid vanadate capsules - Solid state structures, solution stability and surface deposition

Abstract

The dimensions and cavity sizes of the molecular capsules with the general formula [V10O18L4]10- can be controlled modularly through the nature of the bifunctional, rigid organophosphonate ligands L1 and L2 (L1 = bis(4-phosphonatophenyl)ethyne and L2 = bis(4-phosphonatophenyl) butadiyne); the solution stability of the molecular entities as demonstrated by ESI-MS studies permits their assembly on the Au(111) surface on a sub-monolayer scale giving rise to a 2D supramolecular structure that is comparable to the packing arrangements of the capsules in the crystal structures.