Synthesis and Optical Properties of Cinnamylidene Derivatives of Malononitrile Trimer

Abstract

Potassium salts of cinnamylidene derivatives of malononitrile trimer were obtained by the reactions of malononitrile trimer with cinnamaldehyde derivatives. The optical properties of the synthesized salts were studied to show that they absorb, depending on the substituent, in the range of 358–460 nm. The solid-state fluorescence with an emission maximum at 458–460 nm is practically independent of the nature of the substituent and is due to the tetracyanopropene fragment.