Synthesis, structure, and one- and two-photon absorption properties of N-substituted 3,5-bisarylidenepropenpiperidin-4-ones

► A series of 3,5-bisarylidenepropenpiperidin-4-one compounds was synthesized as possible sensitizers for photodynamic therapy. ► Their potential applicability as photosensitizers was proved by measurements of their one- and two-photon absorption spectra. ► For two compounds TPA cross sections is at least six times larger than for earlier synthesized 3,5-bis(arylidene)piperidin-4-ones. ► Spectral data are discussed in connection with structural characteristics of studied materials.