Nitro-containing polysubstituted aromatic diamine monomer and preparation method thereof

The invention provides a nitro-containing polysubstituted aromatic diamine monomer and a preparation method thereof, the structural formula of the nitro-containing polysubstituted aromatic diamine monomer is shown in the specification, R1 and R2 are one of-H,-CF3,-OCH3 or alkyl, and Ar1 and Ar2 are aromatic rings or aromatic heterocyclic rings. The invention provides two preparation methods, one is a base catalysis synthesis method, and the other is an ionic liquid catalysis method. The diamine monomer can be applied to preparation of a high-performance polyimide film material with a nitro-containing structure, and can further improve potential application values of dissolution film-forming performance, optical transparency, tensile strength performance, dielectric loss and the like of the prepared polyimide film material. 本发明提供了一种含硝基多取代芳香二胺单体及其制备方法，所述含硝基多取代芳香二胺单体的结构式为其中，R1、R2为-H、-CF3、-OCH3或烷基中的一种，Ar1、Ar2为芳香环或芳香杂环。本发明提供了两种制备方法，一种是碱催化合成方法，另一种是离子液体催化方法。该二胺单体可应用于高性能含硝基结构的聚酰亚胺薄膜材料的制备，可进一步改善所制聚酰亚胺膜材料的溶解成膜性能、光学透明性、