Regioisomers of self‐assembling molecules resulted in the evolution of distinct 0D and 1D nanostructures, namely nanorings and nanorods (see picture). J‐ and H‐type excitonic coupling of naphthalenechromophores was found in the nanostructures. The bulk liquid‐crystalline states contain hydrogen‐bonded rosettes, which explains how the observed regioisomers generate distinct nanostructures with characteristic