Photoluminescence of Self‐organized Perylene Bisimide Polymers

Summary: Three polymers consisting of alternating perylene bisimide chromophores and flexible polytetrahydrofuran segments of different length have been studied using absorption and (time‐resolved) photoluminescence spectroscopy. In o ‐dichlorobenzene, the chromophores self organize to form H‐like aggregates. The photoluminescence spectra of the self‐organized polymers consist of vibronically resolved monomeric perylene bisimde fluorescence ( λ max = 538 nm, τ = 3.9 ns) and unstructured excimer‐type emission ( λ max = 635 nm, τ = 17 ns). An additional short‐lived ( τ ≈ 2 ns) luminescence component is observed and ascribed to the dynamic deactivation of the monomeric photoexcited state via excimer formation or energy transfer. Structure of alternating perylene bisimide – polyTHF copolymers. image Structure of alternating perylene bisimide – polyTHF copolymers.