Control of the charge-transfer interaction between a flexible porous coordination host and aromatic guests by framework isomerism

Based on 2,5-thiophenedicarboxylate (thdc), two isomorphic frameworks, [Zn(thdc)(dpNDI)]n, are assembled from zinc ions and N,N′-di(4-pyridyl)-1,4,5,8-naphthalenediimide (dpNDI). Because of the significant difference in their porous structures, these isomers show different charge-transfer interactions with electron-donating aromatic molecules.