5种新型聚酰亚胺的合成及光谱学性能研究

Research on Synthesis and Spectroscopic Properties of Five Novel Polyimides

为探讨芳基基团对聚酰亚胺光谱学性能的影响,采用Suzuki偶联反应对分子结构进行修饰,制备具有不同电荷特性芳基取代基的5种聚酰亚胺分子,并对制备的化合物进行核磁表征.结果表明,引入的基团影响了分子中的各向异性,导致制备的聚酰亚胺的特征峰核磁氢谱化学位移存在差异.对制备的聚酰亚胺进行紫外-可见光谱测试结果显示,引入的基团影响了分子的共轭效应,致使最大吸收峰波长发生红移或蓝移.

In order to study the effect of aryl groups on the spectral properties of polyimide,Suzuki coupling reaction was used to modify the molecular structure,and five polyimide molecules with different charge characteristic aryl substituents were prepared.The prepared compounds were characterized by nuclear magnetic characterization.The results showed that the anisotropy in the molecules was affected by the introduced groups,resulting in the difference of the chemical shifts of the characteristic peaks of polyimides.Then the prepared polyimides were tested by Ultraviolet-visible spectrum,and the results showed that the molecular conjugation effect was affected by the introduced groups,resulting in the bathochromic-shift or blue-shift of the maximum absorption peak wavelength.