| abstract |
The invention relates to a large-conjugation fluoreno pyrazine derivative and a preparation method of the large-conjugation fluoreno pyrazine derivative. For the fluoreno pyrazine derivative of large conjugated molecules, a condensation reaction is carried out directly on raw material 2, 3-diamino-9, 9'-dialkyl fluorene and the Suzuki reaction or the Sonagashira reaction is carried out on halogenated 2, 3-diamino-9, 9'-dialkyl fluorene to obtain a series of the large conjugated molecules containing fluoreno pyrazine structures. Alkyls at the molecule periphery help to overcome solubility reduction due to high plane rigid structures of the molecules and improve dissolution processing properties of material molecules. Meanwhile, conjugation of Pi electrons on skeletons of the molecules is further strengthened, so that an energy gap of the molecules is reduced, and certain effect on overcoming defects such as poor chemical stabilities of traditional organic molecule materials is realized, as a result, the large-conjugation fluoreno pyrazine derivative can be widely applied to fields of organic semiconductor materials, nonlinear optical materials, biological and chemical sensors, and solar cells and the like. |