Design And Synthesis Of New Photorefractive Materials Based Indole Groups

In recent years, the functional photorefractive materials have been paid much moreattention, especially in the field of organic device, bacuase these materials usuallyhave incomparable advantages and wide application space compared with inorganicmaterials. The property of the functional photorefractive materials can be improvedthrough changing its molecule structure. Recently, the research focused on the organicpolymer which has high property of nonlinear performance, good mechanical propertythat is easy to mold, and the electro-optical property is easy to maintain. In this paper,we designed and synthesized four photorefractive polymer materials, and the secondorder nonlinear optical properties of monomers and the thermal performance werecharacterized.(1) The polymer monomer contained indoles was synthesized usingindole-3-carbaldehyde,5-methoxyindole-3-carbaldehyde,2-chlorine ethanol,self-restraint methacryloyl chloride as raw materials, and characterized by FT-IR,1HNMR,13C NMR spectra. The synthesis process were optimized, the product yieldwere greatly improved.(2) Copolymers were prepared by taking appropriate mole ratios of themonomers and homopolymers were prepared from the monomer based indole groupby the free radical solution polymerization technique. Four functional photorefractivematerials were synthesized and the synthesis process were optimized. The polymerswere characterized by UV, FT-IR,1H NMR techniques.(3) The second order nonlinear performance of monomers were calculated byB3LYP/6-31G*. Two kinds of monomer of second order nonlinear coefficients wereobtained respectively. The thermal properties of polymers were determined by TG andDSC techniques, and the glass transition temperature of the polymers were measured,and the glass transition temperature and the relationship between the structure werediscussed.In this paper, two new indole polymers monomer were obtained through thenucleophilic substitution reaction. The homopolymers or copolymers which preparedby taking appropriate mole ratios of the monomers contained indole group and HEAwere prepared by the free radical solution polymerization technique. The second ordernonlinear performance of monomers were calculated, the relationship between thestructure and properties were analyzed.