Preparation And Properties Of Aryl Vinyl Based Photochromic Materials

Organic photochromic molecules are an important part of photoresponsive materials as a kind of intelligent materials with fast response speed,low consumption and reversible color change under specific electromagnetic radiation.In the long-term study,scholars found that diarylvinyl photochromic materials have good stability,obvious coloring and other advantages,so that this kind of materials in ion detection,information storage,anti-counterfeiting encryption and other fields are widely studied.However,the synthesis route of such materials is often complex,which greatly increases the cost of synthesis and greatly limits their application.Based on this,in this paper,on the basis of in-depth study of the characteristics of phenyl vinyl skeleton and the properties of diaryl vinyl materials,cleverly combined the two,to prepare a variety of organic photochromic molecules,their preparation process is simple and easy,the coloring effect is clear and obvious,can provide a means for the preparation of diaryl vinyl materials.The main research contents and conclusions include the following two aspects:(1)Two kinds of diarylvinyl molecules TS and TES were synthesized by using triphenylethylene as the molecular framework and two isomerized photoactive molecules as the connecting groups.First,the basic optical properties of the two were characterized by testing.In addition,the reasons for the differences between the two were explained by theoretical calculation.Besides,the solution is solved by solid substrate coating and photochromic hydrogels are prepared.(2)Two kinds of new photochromic materials DE2 S and PE2 S were successfully prepared by using photoactive molecules as the connecting groups.The optical properties and molecular configurations of the two materials were described through testing and Gauss theory calculation.In addition,based on the color-changing characteristics of the photochromic materials above,ultraviolet lamp irradiation is used as the control mode,template method is used as the control means,a variety of anti-counterfeiting performance tests are carried out,showing that they have potential application value in the field of anti-counterfeiting.