Preparation method for constructing two-dimensional organic layer based on cationic-pi interactions

The invention relates to a preparation method for constructing a two-dimensional organic layer based on cationic-pi interactions. Three required construction monomers are obtained by means of organicsynthesis: 1,1',1"-(2,4,6-trioxo-1,3,5-triazine-1,3,5-triguaiacyl tri(ethane-2,1-diyl)) tri(1-(2-(1H-indole-1-yl) ethyl)-1H-imidazole-3-onium) hexafluorophosphate, [1,1'-biphenyl]-4,4'-potassium disulfonate and [1,1'-biphenyl]-4,4'-sodium disulfonate. The three monomers all include different cationic primitives as well as different pi primitives, through a competitive self-classification functionin a solution, 1,1',1"-(2,4,6-trioxo-1,3,5-triazine-1,3,5-triguaiacyl tri(ethane-2,1-diyl)) tri(1-(2-(1H-indole-1-yl) ethyl)-1H-imidazole-3-onium) hexafluorophosphate, [1,1'-biphenyl]-4,4'-potassium disulfonate and [1,1'-biphenyl]-4,4'-sodium disulfonate are subjected to effective molecular self assembling, and by volatizing solvents, a supramolecular two-dimensional material 1 (or a supramolecular two-dimensional material