reactions. All the target chromophores show strong one-photon and two-photon excited emission. The maximum two-photonabsorption (TPA) cross sections δTPA of the prepared derivatives bearing diphenylamino functionalities occur at wavelengths ranging from 760 to 800 nm and are as large as ∼900−1100 GM. One- and two-photonabsorption characteristics of the title dyes have also been investigated by using