Abstract:
The ‘Green Emission Defect’ (GED) produced by fluorenones has significantly retarded the commercial scope of fluorene-based B-OLEDs. In this communication, for the first time, it is demonstrated that the ‘green light’ emitting fluorenones 7 can be converted to ‘blue light’ emitting fluorenones 10 by appropriate positioning of donor-acceptor and chromophoric groups onto the fluorene/fluorenone backbone. Additionally, we report an elegant highly rapid synthetic route for donor-acceptor fluorenes and fluorenones at room temperature with excellent yields
