Preliminary investigation of the optoelectronic properties of 34 revealed a narrow-band emission at 437 nm with a full width at half maximum (FWHM) of 37 nm and a photoluminescence quantum yield 20 (PLQY) of 21.4% (Figure ). This narrowband emission can be ascribed to high symmetry of the rigid conjugation skeleton, resulting in similar molecular geometry between the ground (S0) and excited (S1) states that suppress vibronic couplings. As an interesting candidate for AAPE, quinacridone has been renowned as a pigment since the last century, its application has been extended to optoelectronic functional materials with applications found in OLEDs 9 , OSCs 10 , and OFETs 11 . AAPE strategy on quinacridone will result in an unprecedented conjugated skeleton with interesting donor-acceptor structures abbreviated as DNPA (Figure ). However, C-H activation methods have been rarely successful on quinacridone derivatives. DNPA (35) was obtained in 80% yield under our optimized Fe/Al conditions. DNPA (35) is luminescent in the solution and solid state. It exhibited an exceedingly sharp emission at a wavelength of 577 nm, with a 5 very narrow FWHM of 25 nm and a high PLQY value of 87.3% in toluene (Figure ). A small Stokes shift of 19 nm in chloroform reveals a weak geometrical distortion between the ground and the excited states. The sharp emission and small Stokes shift can be attributed to the enhanced local transition between the amine donor and imine acceptor, as well as to characteristics inherent to the rigid and symmetrical molecular structures 45 . 10 Theoretical calculation indicates the frontier molecular orbitals are fully delocalized across the fused skeleton, where HOMO and LUMO are largely overlapped (Figure ). The time-dependent density functional theory (TD-DFT) analysis revealed that the transition of electrons from the ground state (S0) to the first excited state (S1) primarily involves a HOMO to LUMO transfer. This transition is characterized by a notably high oscillator strength (f) of 0.5384 and a transition energy of 2.39 eV. The 15 significant value of f contributes to an increased fluorescence emission during the S1 to S0 transition, resulting in a high PLQY. The current design of donor-acceptor-based emissive materials embeds three coordinated boron atoms as electron-accepting units . The AAPE strategy to incorporate imine moiety as electron-accepting units can afford structure of enhanced stability toward moisture and nucleophiles to serve as a platform for the exploration of new types of emissive materials. Notably, a class of DNPAs can 20 be easily obtained in good yields by simply diluting with toluene and reprecipitating in methanol after the reaction (see supplementary information), accommodating various alkynes and N-alkyl substituents. This straightforward method provides a convenient route for further synthetic derivatization on DNPA core and for convenience in material optimization.