Acenaphthenequinone is an organic compound with the molecular formula C₁₂H₆O₂. It is a yellow crystalline solid derived from acenaphthene through oxidation. Structurally, it features a fused polycyclic aromatic system with two carbonyl groups, making it a versatile building block in organic synthesis. Its primary and most significant application is in the field of materials science, particularly as a key precursor for the synthesis of organic semiconductors and light-emitting materials. It serves as a fundamental starting material for constructing n-type organic semiconductors, perylene diimide (PDI) derivatives, and various heteroacene structures used in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic field-effect transistors (OFETs). The quinone moiety allows for further functionalization to create complex π-conjugated systems essential for charge transport. Beyond its role in advanced materials, acenaphthenequinone is also utilized as an intermediate in the synthesis of dyes, pigments, and pharmaceuticals. It acts as a model substrate in photochemical and electrochemical studies. Handling requires standard precautions for organic solids, including avoidance of inhalation and contact with skin and eyes.