Furan-based diketopyrrolopyrrole chromophores: Tuning the spectroscopic, electrochemical and aggregation-induced fluorescent properties with various intramolecular donor-acceptor spacers

A family of furan-based diketopyrrolopyrrole chromophores, which presents red fluorescent characteristic properties with the emission maximum at 709 nm, has effective π-conjugated systems and adjustable electronic properties.220