| abstract |
The invention discloses a spirobifluorenoindole derivative, a preparation method and an application thereof. The spirobifluorenoindole derivatives described in the present invention can be used as multifunctional organic luminescent materials. With spirobifluorene indole as the core, due to the steric hindrance effect of spirobifluorene to achieve intramolecular distortion, the electron clouds of the highest occupied orbital and the lowest empty orbital of the molecule can be relatively separated to obtain a small singlet triplet energy level difference, In this way, luminescent molecules with thermally induced delayed fluorescence properties are designed and prepared; the synthesis is relatively simple; the thermal properties, luminous efficiency and light color of the material can be adjusted, and even deep blue light color can be obtained; high fluorescence quantum efficiency can be achieved, and it can be used as a fluorescent object. Thermally activated delayed fluorescence properties can also be used as host materials for fluorescence and phosphorescence, so multifunctional organic light-emitting materials can be constructed by design. |