Fluorescent properties and resonance energy transfer of 3,4-bis(2,4-difluorophenyl)-maleimideElectronic supplementary information (ESI) available. CCDC XXXXXX. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c2ob25981h

A fluorescent compound 3,4-bis(2,4-difluorophenyl)-maleimide 1 from the 3,4-diaryl-substituted maleimides was synthesized and determined to have a Stokes shift of 140 nm ( λ abs 341 nm, λ em 481 nm), a high fluorescent quantum yield ( Φ fl 0.61) and an extinction coefficient (340) of 48 400 M −1 cm −1 in dichloromethane. For the first time we demonstrated the successful implementation of a 3,4-diaryl-substituted maleimide molecule as a donor component in FRET experiments. A fluorescent compound 3,4-bis(2,4-difluorophenyl)-maleimide 1 from the 3,4-diaryl-substituted maleimide was synthesized and determined to have a Stokes shift of 140 nm ( λ abs 341 nm, λ em 481 nm), a high fluorescent quantum yield ( Φ fl 0.61) and an extinction coefficient (340) of 48 400 M −1 cm −1 in dichloromethane.