Optical properties and fluorescence quenching of carbazole containing (D–π–A) push–pull chromophores by silver nanoparticles: a detailed insight via an experimental and theoretical approach

(4<italic>Z</italic>)-4-[(9-Ethyl-9<italic>H</italic>-carbazol-3-yl)methylidene]-2-phenyl-1,3-oxazol-5(4<italic>H</italic>)-one (ECPO) was prepared by the one-pot multi-component reaction of 9-ethyl-9<italic>H</italic>-carbazole-3-carbaldehyde, hippuric acid, anhydrous sodium acetate and acetic anhydride under microwave irradiation.