Long-lived charge separation in a rigid pentiptycene bis(crown ether)–Li⁺C₆₀ host–guest complex

We report long-lived charge separation in a highly rigid host–guest complex of pentiptycene bis(crown ether) and Li⁺@C₆₀, in which the pentiptycene framework is actively involved as an electron donor in a photoinduced electron-transfer process to the excited states of Li⁺@C₆₀ through a rigid distance in the complex.