Preparation And Photochromism Or Thermochromism Of Azo Shiff's Compounds

This thesis includes four chapters:Chapter 1: The principle of photochromic azo compound and the application valuePhotochromic compounds have attracted much attention recently because of their have different optical property, such as photochromism;Nonlinear optics material;Liquid crystal material; Optical anisotropy and potential utility in various high-tech applications, such as optical information storage materials;nonlinear optical materials liquid crystal materials ; optoelectronic devices ; optical activity of biological molecules control;nano-materials;high-tech materials eatal. This chapter summarizes the development of photochromic process of photochromism as the working principle of information storage, organic photochromic compounds for optical information storage medium has the advantages of photochromic compounds in applications. Focusing on the mechanism of azobenzene discoloration, impact factors, as well as with the current optical activity of azo compounds benzene study, as well as the constraints of the internal factors of its development.Chapter 2: Linear Azo Schiff Base Synthesis and CharacterizationThis part is about the experiment. After diazotization of aniline and coupling. We got a series of amino azo compound, then condensation with salicylaldehyde. We got a series of azo schiff Base. All the compounds were characterized by element analysis, 1H NMR, IR.Chapter 3: Photochromism and Thermochromism Properties of linear Azo Shiff,sIn this section,we studied 19 azo compounds photochromic behavior in the solution. The results showed that these compounds have certain is photochromic, and in which there are two compounds have good at photochromic and thermochromic. Take reference for its practical. Chapter 4: Synthesis and Photochromic Properties of DisazoThis part of the experiment, 14 azo compounds condensation through the amino azo compounds and Azo Shiff,s. All the compounds were characterized by element analysis, 1H NMR, IR. Study photochromic behavior of these compounds in DMSO solution, results showed that these compounds have some of the photochromic. For further research to provide reference.