High-planarity diamine monomer containing fluorene or fluorenone structure and synthesis method and application thereof

The invention discloses a high-planarity diamine monomer containing a fluorene or fluorenone structure and a synthesis method and application thereof.Halogen atoms of dihalogenation fluorene or fluorenone react with amidogen to form secondary amine; or dihalogenation fluorene or fluorenone is subjected to cyaniding, hydrolysis and chloroformylation reaction to obtain acyl chloride, and then an amido bond is formed by means of acyl chloride and amidogen; or binitro fluorene or fluorenone is used to obtain amidogen, and then a urea bond is formed by means of amidogen and isocyanate; or dihalogenation fluorene or fluorenone is subjected to Suzuki and reduction reaction to obtain amidogen, and secondary amine is formed by means of amidogen and halogen atoms; or dihalogenation fluorene or fluorenone reacts with hydroxyl to form an ether bond.Finally, binitro containing secondary amine, amido bond, urea bond and ether bond is reduced to be diamine.The lowest energy state 3D structure of the diamine monomer has high planarity, and by means of the diamine monomer, polymers such as polyamide, polyimide, polyamideimide and polyureas-imide with high inter-molecular-chain interaction force and small free volume can be prepared.