Synthesis And Research On The Properties Of AZOPA

Photorefractive materials hold great promise for optical device applications in the areas of reversible optical holography, noise-free optical signal image amplification, phase conjugate mirrors, and other optical signal processing techniques. The photorefractive effect is a light-induced change in the refractive index of a nonlinear optical material. It results from creation of an electric field induced by directional charge transport over macroscopic distances. So PR polymers attracted great interest of scientists.Density Functional Theory is based on the self-consistent charging density. It is often the quantum mechanical method of choice because the same accuracy as high-level traditioal ab initio techniques may be attained but with a fraction of the computational time. Larger molecules can be studied with DFT.In this article, we synthesis a new compound which can be chosen to be the electro-optic chromophore, AZOPA, and investigate its molecular structure and photorefractive properties as well when it is compounded with PVK, PBA and TNF with a certain ratio. We observe the PR effect in the absence of an applied external electric field.These results indicate that this composition have highly PR performance and makes great progress in practical applications of the PR polymer, and is promising to accelerate research on the optical device applications. Wo also introduce the Density Functional Theory and applied its major method-B3LYP to calculate the properties of AZOPA and explain the tautomerism of AZOPA.