Diamine monomer containing 4-dimethylamine-substituted tetraphenyl-p-phenylenediamine structure and preparation method and application of diamine monomer containing 4-dimethylamine-substituted tetraphenyl-p-phenylenediamine structure

The invention discloses a diamine monomer containing a 4-dimethylamine-substituted tetraphenyl-p-phenylenediamine structure and a preparation method and application of the diamine monomer containing the 4-dimethylamine-substituted tetraphenyl-p-phenylenediamine structure and belongs to the technical field of organic compound preparation. The preparation method includes firstly, subjecting N,N-dimethyl-1,4-phenylenediamine and p-fluoronitrobenzene to nucleophilic substitution under the action of catalysis of triethylamine so as to obtain 4-dimethylamine-4'-nitrodiphenylamine; secondly, enabling 1,4-diiodobenzene and the 4-dimethylamine-4'-nitrodiphenylamine to undergo Ullmann reaction so as to obtain N,N'-bis(4-nitrobenzene)-N,N'-bis(4-dimethylamine)-1,4- phenylenediamine; finally, subjecting a dinitro compound to stannous chloride reduction so as to obtain a N,N'-bis(4-aminobenzene)-N,N'-bis(4-dimethylamine)-1,4-phenylenediamine solid. The diamine monomer of the peculiar structure enables a prepared polymer to have excellent thermal performance and demonstrate optical change and multiple electrochromic properties in near infrared regions, thereby being huge in application potential in the fields of photoconductors, hole transport, electrochromism and the like.