Photosensitizer for regulating and controlling intramolecular charge transfer effect characteristics as well as preparation method and application of photosensitizer

The invention discloses a photosensitizer for regulating and controlling intramolecular charge transfer effect characteristics and a preparation method and application thereof.The preparation method comprises the steps that phenothiazine and bromohexane are dissolved in DMF, and a compound 1 is prepared; dissolving the compound 1 in 1, 2-dichloroethane, and injecting POCl3 to prepare a compound 2; dissolving the compound 2 and NBS in DMF to prepare a compound 3; injecting THF and water into the compound 3, triphenylamine boric acid, tetrakis (triphenylphosphine) palladium and potassium carbonate in an N2 environment to prepare a compound 4; dissolving 1, 3-indandione, malononitrile and sodium acetate in ethanol to prepare a compound 5/a compound 6; and dissolving the compound 4 and 1, 3-indandione/compound 5/compound 6 in chloroform, adding pyridine, and carrying out a reflux reaction to prepare TP1/TP2/TP3. The method has the advantages that the product has low O2 dependence, has bright aggregation-induced f