Crystal structure and fluorescence of 1-[8-phenyl-9-(phenyl-ethyn-yl)-4 H -benzo[ def ]carbazol-4-yl]ethan-1-one.

The crystal of the title compound, C 60 H 38 N 2 O 2 , which crystallizes in the monoclinic space group P 2 1 / n , was obtained by thermal evaporation of a 1:1 di-chloro-methane and hexa-nes solution of the pure compound. The crystal structure is stabilized by π-π inter-actions between benzo[ def ]carbazole moieties and carbon-yl-carbonyl inter-actions between the two acetyl groups.