Abstract
Nanographenes(NGs)with twisted backbones are emerging as new candidates for chiroptical materials.In this work,we describe a new strategy for synthesizing a[10]twistacene-embedded NG which exhibits a rare flag-hinge-like geometry.By neatly creating steric crowding on the[6]helicene breaches of the NG skeleton,the synthesis only provided homochiral isomers without generating the"meso-"isomer.The formed NGs showed high luminescence with quantum yield up to 52％,and promising circularly polarized luminescence(CPL)performance with|glum|up to 5.0×10-3.Besides,these NGs also showed outstanding CPL brightness(BCPL)up to 305 L mol-1 cm-1among chiral NGs.
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