含咔唑次甲基生色团的MCRA超结构光折变分子的合成与表征-材料学专业论文.docxVIP

Abst Abstract 万方数据 万方数据 Abstract Photorefractive hyper-structured molecules (HSM) are molecules that combine different functional photorefractive components such as charge transporting group (CT) and nonlinear optical chromophore (NLO) together to form a complex molecule, and realize its photorefractive effect through the synergy among the components. In this paper, five small functional molecules were synthesized, then they were introduced into the MCRA core to prepare seven photorefractive HSM. This method can avoid the problems that the NLO chromophores is difficult to introduce and determine its contents. Firtly, the hydroxyl-containing functional molecules Cz-OH and CzCSN were synthesized, then four HSM CRA-CSNx-Cz(100-x) (where x = 100, 75, 50, 25 represents the molar ratio of CzCSN and carboxyl groups of MCRA) containing both NLO chromophore and CT were prepared via esterification reaction between carboxyl-containing MCRA core and hydroxyl group-containing functional molecules, respectively. Their chemical strutures were characterized by 1H(13C) NMR, FT-IR, EA, etc. GPC results show that the synthesized HSM have narrow PDI distribution. The element analysis results of CRA-CSN100-Cz0 show that the average introuduced number of CSN chromophores into MCRA core are about 4.6, and the esterification rate is about 57.5%. With the increase of CSN chromophores content, their thermal stability are increased . In the second part, in order to further investigate the effects of different choromophores on the PR properties of HSM, the other three hydroxyl-containing NLO functional molecules CzMN, CzSN and CzCMA were synthesized. Then, three CRA-Meth. (where Meth.= MN, SN, CMA represent choromophores with different structure) were synthesized using the same method as CRA-CSN100-Cz0. Their chemical structures were confirmed by 1H(13C) NMR, FT-IR, EA, etc. The average number of introduced chromophores calculated from EA results are about 4-5, and the esterification