[摘要]：The "green emission defect" (GED) produced by fluorenones has significantly retarded the com. scope of fluorene-based B-OLEDs. In this paper, for the first time, it is demonstrated that the "green light" emitting fluorenones 7 (I) can be converted to "blue light" emitting fluorenones 10 (II) by appropriate positioning of donor-acceptor and chromophoric groups onto the fluorene/fluorenone backbone. Addnl., we report an elegant highly rapid synthetic route for donor-acceptor fluorenes and fluorenones at room temp. with excellent yields.
