Emission behavior of naphthalimide-coumarin cassette.

In this contribution, a dye (C8-alkyl substituted Naphthalimide-Coumarin, CNC) with naphthalimide and coumarin incorporated together with -NHN = bridge unit. The compound was fully characterized by NMR and HRMS spectroscopic techniques. Highly emissive character was investigated in detail in various polar environments. The emission maximum varied from 430 to 470 nm. In polycarbonate film, CNC is also highly emissive with 560 nm emission peak. While in sold, the emission maximum was further shifted to 580 nm due to the more tightly packing mode than that in film. The C8-alkyl substitution enhances the solubility of CNC and also contributes most to its solid emission. [ABSTRACT FROM AUTHOR]