Synthesis and properties of fluorene based small molecule acceptors containing aromatic malononitrile functionalities
Four novel small molecule acceptors (SMA) with fluorene-based cores were synthesized with terminal phenyl, thienyl, and furyl malononitrile groups in good yields.The products were obtained from a two-step reaction of 2,2′-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) with m- or p-bromobenzaldehyde, 5-bromo-2-thiop