FIELD: chemistry. SUBSTANCE: invention relates to the field of luminescent compounds with a heterocyclic naphtho[1,8-ef]perimidine core. EFFECT: proposed diazaperylene fluorescent chemical sensor — 12-methoxynaphtho[1,8-ef]perimidine is a more sensitive "turn-off" chemical sensor for nitro-explosive substances (explosives) than perylene, and is potentially applicable as a working fluid of sensor materials and as a component of fluorescent explosive detectors in the army, navy, and in law enforcement bodies. 1 cl, 4 dwg, 2 tbl.