Synthesis of photorefractive materials has become an active research area due to their potential use in the manufacturing of electro-optical devices. It is known that substances containing chromophores in general present NonLinear Optical (NLO) properties. We have investigated the NLO properties and self-interaction of laser beam in a medium (due to changes in optical properties of the medium induced by the incident radiation) of a molecule with terminal cyano group. Self-diffraction is produced in non-linear media when the beam power is high enough and has been reported in liquids crystals, organic dyes and polymers. In this work, we present the patterns obtained from 4-(4-pentenyloxy)benzonitrile as a function of the intensity of the incident beam. We studied the self-organization. This material also was characterized by Micro-Raman, DSC, fluorescence and optical techniques.