Characterization of Push-Pull-Type Benzo[X]quinoline Derivatives (X = or ): Environmentally Responsive Fluorescent Dyes with Multiple Functions.

Benzo[X]quinoline (X = or : ) derivatives bearing bis-trifluoromethyl and amine groups have been designed as push-pull-type fluorescent dyes. Through the synthesis of derivatives from 2,7-diaminonaphthalene, linear-type () and angular-type () structural isomers were obtained. X-ray structures of single crystals from six given derivatives revealed that the and series adopt planar- and bowl-shaped structures.