Narrow absorption bands through exciton coupling in supramolecularly engineered merocyanine π-stacks

Self-assembly of a bis-merocyanine tweezer affords a narrowband absorber that connects to a family of supramolecular aggregates derived from the same chromophore spanning 1 eV of the visible spectrum. Their narrow absorption bands are evaluated by width/symmetry/spectral cross-talk, highlighting their potential for highly selective organic photodiodes.