The double AAPE reaction also facilitated the construction of a helical-bischromenoisoquinoline (Heli-BCIQ, 33) from chromeno[3,2-a]xanthene-13,14-dione 32 (Figure ). An initial examination of the optoelectronic characteristics of 33 showed a green emission, with a photoluminescence quantum yield (PLQY) of 23.0% (See Figure ). The structure of Heli-BCIQ was demonstrated by single crystal 15 X-ray analysis, displayed as mirror-image plots for the (M) and (P) enantiomers (Figure ). Further investigations were intended on the properties of Heli-BCIQ, especially applied on devices as potential candidates for circularly polarized luminescence (CPL) materials. The packing structure of Heli-BCIQ showed homochiral stacking along [110] direction (Figure ) and along [1-10] (Figure ), forming twodimensional homochiral assembly. The nearby heterochiral layers form characteristic zipper-like p-20 stacking with a distance of 3.27 Å.